"use strict";
var BigInt2 = (function (undefined) {

    var BASE = 1e7,
        LOG_BASE = 7,
        MAX_INT = 9007199254740992,
        MAX_INT_ARR = smallToArray(MAX_INT),
        DEFAULT_ALPHABET = "0123456789abcdefghijklmnopqrstuvwxyz";

    var supportsNativeBigInt = typeof BigInt === "function";

    function Integer(v, radix, alphabet, caseSensitive) {
        if (typeof v === "undefined") return Integer[0];
        if (typeof radix !== "undefined") return +radix === 10 && !alphabet ? parseValue(v) : parseBase(v, radix, alphabet, caseSensitive);
        return parseValue(v);
    }

    function BigInteger(value, sign) {
        this.value = value;
        this.sign = sign;
        this.isSmall = false;
    }
    BigInteger.prototype = Object.create(Integer.prototype);

    function SmallInteger(value) {
        this.value = value;
        this.sign = value < 0;
        this.isSmall = true;
    }
    SmallInteger.prototype = Object.create(Integer.prototype);

    function NativeBigInt(value) {
        this.value = value;
    }
    NativeBigInt.prototype = Object.create(Integer.prototype);

    function isPrecise(n) {
        return -MAX_INT < n && n < MAX_INT;
    }

    function smallToArray(n) { // For performance reasons doesn't reference BASE, need to change this function if BASE changes
        if (n < 1e7)
            return [n];
        if (n < 1e14)
            return [n % 1e7, Math.floor(n / 1e7)];
        return [n % 1e7, Math.floor(n / 1e7) % 1e7, Math.floor(n / 1e14)];
    }

    function arrayToSmall(arr) { // If BASE changes this function may need to change
        trim(arr);
        var length = arr.length;
        if (length < 4 && compareAbs(arr, MAX_INT_ARR) < 0) {
            switch (length) {
                case 0: return 0;
                case 1: return arr[0];
                case 2: return arr[0] + arr[1] * BASE;
                default: return arr[0] + (arr[1] + arr[2] * BASE) * BASE;
            }
        }
        return arr;
    }

    function trim(v) {
        var i = v.length;
        while (v[--i] === 0);
        v.length = i + 1;
    }

    function createArray(length) { // function shamelessly stolen from Yaffle's library https://github.com/Yaffle/BigInteger
        var x = new Array(length);
        var i = -1;
        while (++i < length) {
            x[i] = 0;
        }
        return x;
    }

    function truncate(n) {
        if (n > 0) return Math.floor(n);
        return Math.ceil(n);
    }

    function add(a, b) { // assumes a and b are arrays with a.length >= b.length
        var l_a = a.length,
            l_b = b.length,
            r = new Array(l_a),
            carry = 0,
            base = BASE,
            sum, i;
        for (i = 0; i < l_b; i++) {
            sum = a[i] + b[i] + carry;
            carry = sum >= base ? 1 : 0;
            r[i] = sum - carry * base;
        }
        while (i < l_a) {
            sum = a[i] + carry;
            carry = sum === base ? 1 : 0;
            r[i++] = sum - carry * base;
        }
        if (carry > 0) r.push(carry);
        return r;
    }

    function addAny(a, b) {
        if (a.length >= b.length) return add(a, b);
        return add(b, a);
    }

    function addSmall(a, carry) { // assumes a is array, carry is number with 0 <= carry < MAX_INT
        var l = a.length,
            r = new Array(l),
            base = BASE,
            sum, i;
        for (i = 0; i < l; i++) {
            sum = a[i] - base + carry;
            carry = Math.floor(sum / base);
            r[i] = sum - carry * base;
            carry += 1;
        }
        while (carry > 0) {
            r[i++] = carry % base;
            carry = Math.floor(carry / base);
        }
        return r;
    }

    BigInteger.prototype.add = function (v) {
        var n = parseValue(v);
        if (this.sign !== n.sign) {
            return this.subtract(n.negate());
        }
        var a = this.value, b = n.value;
        if (n.isSmall) {
            return new BigInteger(addSmall(a, Math.abs(b)), this.sign);
        }
        return new BigInteger(addAny(a, b), this.sign);
    };
    BigInteger.prototype.plus = BigInteger.prototype.add;

    SmallInteger.prototype.add = function (v) {
        var n = parseValue(v);
        var a = this.value;
        if (a < 0 !== n.sign) {
            return this.subtract(n.negate());
        }
        var b = n.value;
        if (n.isSmall) {
            if (isPrecise(a + b)) return new SmallInteger(a + b);
            b = smallToArray(Math.abs(b));
        }
        return new BigInteger(addSmall(b, Math.abs(a)), a < 0);
    };
    SmallInteger.prototype.plus = SmallInteger.prototype.add;

    NativeBigInt.prototype.add = function (v) {
        return new NativeBigInt(this.value + parseValue(v).value);
    }
    NativeBigInt.prototype.plus = NativeBigInt.prototype.add;

    function subtract(a, b) { // assumes a and b are arrays with a >= b
        var a_l = a.length,
            b_l = b.length,
            r = new Array(a_l),
            borrow = 0,
            base = BASE,
            i, difference;
        for (i = 0; i < b_l; i++) {
            difference = a[i] - borrow - b[i];
            if (difference < 0) {
                difference += base;
                borrow = 1;
            } else borrow = 0;
            r[i] = difference;
        }
        for (i = b_l; i < a_l; i++) {
            difference = a[i] - borrow;
            if (difference < 0) difference += base;
            else {
                r[i++] = difference;
                break;
            }
            r[i] = difference;
        }
        for (; i < a_l; i++) {
            r[i] = a[i];
        }
        trim(r);
        return r;
    }

    function subtractAny(a, b, sign) {
        var value;
        if (compareAbs(a, b) >= 0) {
            value = subtract(a, b);
        } else {
            value = subtract(b, a);
            sign = !sign;
        }
        value = arrayToSmall(value);
        if (typeof value === "number") {
            if (sign) value = -value;
            return new SmallInteger(value);
        }
        return new BigInteger(value, sign);
    }

    function subtractSmall(a, b, sign) { // assumes a is array, b is number with 0 <= b < MAX_INT
        var l = a.length,
            r = new Array(l),
            carry = -b,
            base = BASE,
            i, difference;
        for (i = 0; i < l; i++) {
            difference = a[i] + carry;
            carry = Math.floor(difference / base);
            difference %= base;
            r[i] = difference < 0 ? difference + base : difference;
        }
        r = arrayToSmall(r);
        if (typeof r === "number") {
            if (sign) r = -r;
            return new SmallInteger(r);
        } return new BigInteger(r, sign);
    }

    BigInteger.prototype.subtract = function (v) {
        var n = parseValue(v);
        if (this.sign !== n.sign) {
            return this.add(n.negate());
        }
        var a = this.value, b = n.value;
        if (n.isSmall)
            return subtractSmall(a, Math.abs(b), this.sign);
        return subtractAny(a, b, this.sign);
    };
    BigInteger.prototype.minus = BigInteger.prototype.subtract;

    SmallInteger.prototype.subtract = function (v) {
        var n = parseValue(v);
        var a = this.value;
        if (a < 0 !== n.sign) {
            return this.add(n.negate());
        }
        var b = n.value;
        if (n.isSmall) {
            return new SmallInteger(a - b);
        }
        return subtractSmall(b, Math.abs(a), a >= 0);
    };
    SmallInteger.prototype.minus = SmallInteger.prototype.subtract;

    NativeBigInt.prototype.subtract = function (v) {
        return new NativeBigInt(this.value - parseValue(v).value);
    }
    NativeBigInt.prototype.minus = NativeBigInt.prototype.subtract;

    BigInteger.prototype.negate = function () {
        return new BigInteger(this.value, !this.sign);
    };
    SmallInteger.prototype.negate = function () {
        var sign = this.sign;
        var small = new SmallInteger(-this.value);
        small.sign = !sign;
        return small;
    };
    NativeBigInt.prototype.negate = function () {
        return new NativeBigInt(-this.value);
    }

    BigInteger.prototype.abs = function () {
        return new BigInteger(this.value, false);
    };
    SmallInteger.prototype.abs = function () {
        return new SmallInteger(Math.abs(this.value));
    };
    NativeBigInt.prototype.abs = function () {
        return new NativeBigInt(this.value >= 0 ? this.value : -this.value);
    }

    function multiplyLong(a, b) {
        var a_l = a.length,
            b_l = b.length,
            l = a_l + b_l,
            r = createArray(l),
            base = BASE,
            product, carry, i, a_i, b_j;
        for (i = 0; i < a_l; ++i) {
            a_i = a[i];
            for (var j = 0; j < b_l; ++j) {
                b_j = b[j];
                product = a_i * b_j + r[i + j];
                carry = Math.floor(product / base);
                r[i + j] = product - carry * base;
                r[i + j + 1] += carry;
            }
        }
        trim(r);
        return r;
    }

    function multiplySmall(a, b) { // assumes a is array, b is number with |b| < BASE
        var l = a.length,
            r = new Array(l),
            base = BASE,
            carry = 0,
            product, i;
        for (i = 0; i < l; i++) {
            product = a[i] * b + carry;
            carry = Math.floor(product / base);
            r[i] = product - carry * base;
        }
        while (carry > 0) {
            r[i++] = carry % base;
            carry = Math.floor(carry / base);
        }
        return r;
    }

    function shiftLeft(x, n) {
        var r = [];
        while (n-- > 0) r.push(0);
        return r.concat(x);
    }

    function multiplyKaratsuba(x, y) {
        var n = Math.max(x.length, y.length);

        if (n <= 30) return multiplyLong(x, y);
        n = Math.ceil(n / 2);

        var b = x.slice(n),
            a = x.slice(0, n),
            d = y.slice(n),
            c = y.slice(0, n);

        var ac = multiplyKaratsuba(a, c),
            bd = multiplyKaratsuba(b, d),
            abcd = multiplyKaratsuba(addAny(a, b), addAny(c, d));

        var product = addAny(addAny(ac, shiftLeft(subtract(subtract(abcd, ac), bd), n)), shiftLeft(bd, 2 * n));
        trim(product);
        return product;
    }

    // The following function is derived from a surface fit of a graph plotting the performance difference
    // between long multiplication and karatsuba multiplication versus the lengths of the two arrays.
    function useKaratsuba(l1, l2) {
        return -0.012 * l1 - 0.012 * l2 + 0.000015 * l1 * l2 > 0;
    }

    BigInteger.prototype.multiply = function (v) {
        var n = parseValue(v),
            a = this.value, b = n.value,
            sign = this.sign !== n.sign,
            abs;
        if (n.isSmall) {
            if (b === 0) return Integer[0];
            if (b === 1) return this;
            if (b === -1) return this.negate();
            abs = Math.abs(b);
            if (abs < BASE) {
                return new BigInteger(multiplySmall(a, abs), sign);
            }
            b = smallToArray(abs);
        }
        if (useKaratsuba(a.length, b.length)) // Karatsuba is only faster for certain array sizes
            return new BigInteger(multiplyKaratsuba(a, b), sign);
        return new BigInteger(multiplyLong(a, b), sign);
    };

    BigInteger.prototype.times = BigInteger.prototype.multiply;

    function multiplySmallAndArray(a, b, sign) { // a >= 0
        if (a < BASE) {
            return new BigInteger(multiplySmall(b, a), sign);
        }
        return new BigInteger(multiplyLong(b, smallToArray(a)), sign);
    }
    SmallInteger.prototype._multiplyBySmall = function (a) {
        if (isPrecise(a.value * this.value)) {
            return new SmallInteger(a.value * this.value);
        }
        return multiplySmallAndArray(Math.abs(a.value), smallToArray(Math.abs(this.value)), this.sign !== a.sign);
    };
    BigInteger.prototype._multiplyBySmall = function (a) {
        if (a.value === 0) return Integer[0];
        if (a.value === 1) return this;
        if (a.value === -1) return this.negate();
        return multiplySmallAndArray(Math.abs(a.value), this.value, this.sign !== a.sign);
    };
    SmallInteger.prototype.multiply = function (v) {
        return parseValue(v)._multiplyBySmall(this);
    };
    SmallInteger.prototype.times = SmallInteger.prototype.multiply;

    NativeBigInt.prototype.multiply = function (v) {
        return new NativeBigInt(this.value * parseValue(v).value);
    }
    NativeBigInt.prototype.times = NativeBigInt.prototype.multiply;

    function square(a) {
        //console.assert(2 * BASE * BASE < MAX_INT);
        var l = a.length,
            r = createArray(l + l),
            base = BASE,
            product, carry, i, a_i, a_j;
        for (i = 0; i < l; i++) {
            a_i = a[i];
            carry = 0 - a_i * a_i;
            for (var j = i; j < l; j++) {
                a_j = a[j];
                product = 2 * (a_i * a_j) + r[i + j] + carry;
                carry = Math.floor(product / base);
                r[i + j] = product - carry * base;
            }
            r[i + l] = carry;
        }
        trim(r);
        return r;
    }

    BigInteger.prototype.square = function () {
        return new BigInteger(square(this.value), false);
    };

    SmallInteger.prototype.square = function () {
        var value = this.value * this.value;
        if (isPrecise(value)) return new SmallInteger(value);
        return new BigInteger(square(smallToArray(Math.abs(this.value))), false);
    };

    NativeBigInt.prototype.square = function (v) {
        return new NativeBigInt(this.value * this.value);
    }

    function divMod1(a, b) { // Left over from previous version. Performs faster than divMod2 on smaller input sizes.
        var a_l = a.length,
            b_l = b.length,
            base = BASE,
            result = createArray(b.length),
            divisorMostSignificantDigit = b[b_l - 1],
            // normalization
            lambda = Math.ceil(base / (2 * divisorMostSignificantDigit)),
            remainder = multiplySmall(a, lambda),
            divisor = multiplySmall(b, lambda),
            quotientDigit, shift, carry, borrow, i, l, q;
        if (remainder.length <= a_l) remainder.push(0);
        divisor.push(0);
        divisorMostSignificantDigit = divisor[b_l - 1];
        for (shift = a_l - b_l; shift >= 0; shift--) {
            quotientDigit = base - 1;
            if (remainder[shift + b_l] !== divisorMostSignificantDigit) {
                quotientDigit = Math.floor((remainder[shift + b_l] * base + remainder[shift + b_l - 1]) / divisorMostSignificantDigit);
            }
            // quotientDigit <= base - 1
            carry = 0;
            borrow = 0;
            l = divisor.length;
            for (i = 0; i < l; i++) {
                carry += quotientDigit * divisor[i];
                q = Math.floor(carry / base);
                borrow += remainder[shift + i] - (carry - q * base);
                carry = q;
                if (borrow < 0) {
                    remainder[shift + i] = borrow + base;
                    borrow = -1;
                } else {
                    remainder[shift + i] = borrow;
                    borrow = 0;
                }
            }
            while (borrow !== 0) {
                quotientDigit -= 1;
                carry = 0;
                for (i = 0; i < l; i++) {
                    carry += remainder[shift + i] - base + divisor[i];
                    if (carry < 0) {
                        remainder[shift + i] = carry + base;
                        carry = 0;
                    } else {
                        remainder[shift + i] = carry;
                        carry = 1;
                    }
                }
                borrow += carry;
            }
            result[shift] = quotientDigit;
        }
        // denormalization
        remainder = divModSmall(remainder, lambda)[0];
        return [arrayToSmall(result), arrayToSmall(remainder)];
    }

    function divMod2(a, b) { // Implementation idea shamelessly stolen from Silent Matt's library http://silentmatt.com/biginteger/
        // Performs faster than divMod1 on larger input sizes.
        var a_l = a.length,
            b_l = b.length,
            result = [],
            part = [],
            base = BASE,
            guess, xlen, highx, highy, check;
        while (a_l) {
            part.unshift(a[--a_l]);
            trim(part);
            if (compareAbs(part, b) < 0) {
                result.push(0);
                continue;
            }
            xlen = part.length;
            highx = part[xlen - 1] * base + part[xlen - 2];
            highy = b[b_l - 1] * base + b[b_l - 2];
            if (xlen > b_l) {
                highx = (highx + 1) * base;
            }
            guess = Math.ceil(highx / highy);
            do {
                check = multiplySmall(b, guess);
                if (compareAbs(check, part) <= 0) break;
                guess--;
            } while (guess);
            result.push(guess);
            part = subtract(part, check);
        }
        result.reverse();
        return [arrayToSmall(result), arrayToSmall(part)];
    }

    function divModSmall(value, lambda) {
        var length = value.length,
            quotient = createArray(length),
            base = BASE,
            i, q, remainder, divisor;
        remainder = 0;
        for (i = length - 1; i >= 0; --i) {
            divisor = remainder * base + value[i];
            q = truncate(divisor / lambda);
            remainder = divisor - q * lambda;
            quotient[i] = q | 0;
        }
        return [quotient, remainder | 0];
    }

    function divModAny(self, v) {
        var value, n = parseValue(v);
        if (supportsNativeBigInt) {
            return [new NativeBigInt(self.value / n.value), new NativeBigInt(self.value % n.value)];
        }
        var a = self.value, b = n.value;
        var quotient;
        if (b === 0) throw new Error("Cannot divide by zero");
        if (self.isSmall) {
            if (n.isSmall) {
                return [new SmallInteger(truncate(a / b)), new SmallInteger(a % b)];
            }
            return [Integer[0], self];
        }
        if (n.isSmall) {
            if (b === 1) return [self, Integer[0]];
            if (b == -1) return [self.negate(), Integer[0]];
            var abs = Math.abs(b);
            if (abs < BASE) {
                value = divModSmall(a, abs);
                quotient = arrayToSmall(value[0]);
                var remainder = value[1];
                if (self.sign) remainder = -remainder;
                if (typeof quotient === "number") {
                    if (self.sign !== n.sign) quotient = -quotient;
                    return [new SmallInteger(quotient), new SmallInteger(remainder)];
                }
                return [new BigInteger(quotient, self.sign !== n.sign), new SmallInteger(remainder)];
            }
            b = smallToArray(abs);
        }
        var comparison = compareAbs(a, b);
        if (comparison === -1) return [Integer[0], self];
        if (comparison === 0) return [Integer[self.sign === n.sign ? 1 : -1], Integer[0]];

        // divMod1 is faster on smaller input sizes
        if (a.length + b.length <= 200)
            value = divMod1(a, b);
        else value = divMod2(a, b);

        quotient = value[0];
        var qSign = self.sign !== n.sign,
            mod = value[1],
            mSign = self.sign;
        if (typeof quotient === "number") {
            if (qSign) quotient = -quotient;
            quotient = new SmallInteger(quotient);
        } else quotient = new BigInteger(quotient, qSign);
        if (typeof mod === "number") {
            if (mSign) mod = -mod;
            mod = new SmallInteger(mod);
        } else mod = new BigInteger(mod, mSign);
        return [quotient, mod];
    }

    BigInteger.prototype.divmod = function (v) {
        var result = divModAny(this, v);
        return {
            quotient: result[0],
            remainder: result[1]
        };
    };
    NativeBigInt.prototype.divmod = SmallInteger.prototype.divmod = BigInteger.prototype.divmod;

    BigInteger.prototype.divide = function (v) {
        return divModAny(this, v)[0];
    };
    NativeBigInt.prototype.over = NativeBigInt.prototype.divide = function (v) {
        return new NativeBigInt(this.value / parseValue(v).value);
    };
    SmallInteger.prototype.over = SmallInteger.prototype.divide = BigInteger.prototype.over = BigInteger.prototype.divide;

    BigInteger.prototype.mod = function (v) {
        return divModAny(this, v)[1];
    };
    NativeBigInt.prototype.mod = NativeBigInt.prototype.remainder = function (v) {
        return new NativeBigInt(this.value % parseValue(v).value);
    };
    SmallInteger.prototype.remainder = SmallInteger.prototype.mod = BigInteger.prototype.remainder = BigInteger.prototype.mod;

    BigInteger.prototype.pow = function (v) {
        var n = parseValue(v),
            a = this.value,
            b = n.value,
            value, x, y;
        if (b === 0) return Integer[1];
        if (a === 0) return Integer[0];
        if (a === 1) return Integer[1];
        if (a === -1) return n.isEven() ? Integer[1] : Integer[-1];
        if (n.sign) {
            return Integer[0];
        }
        if (!n.isSmall) throw new Error("The exponent " + n.toString() + " is too large.");
        if (this.isSmall) {
            if (isPrecise(value = Math.pow(a, b)))
                return new SmallInteger(truncate(value));
        }
        x = this;
        y = Integer[1];
        while (true) {
            if (b & 1 === 1) {
                y = y.times(x);
                --b;
            }
            if (b === 0) break;
            b /= 2;
            x = x.square();
        }
        return y;
    };
    SmallInteger.prototype.pow = BigInteger.prototype.pow;

    NativeBigInt.prototype.pow = function (v) {
        var n = parseValue(v);
        var a = this.value, b = n.value;
        var _0 = BigInt(0), _1 = BigInt(1), _2 = BigInt(2);
        if (b === _0) return Integer[1];
        if (a === _0) return Integer[0];
        if (a === _1) return Integer[1];
        if (a === BigInt(-1)) return n.isEven() ? Integer[1] : Integer[-1];
        if (n.isNegative()) return new NativeBigInt(_0);
        var x = this;
        var y = Integer[1];
        while (true) {
            if ((b & _1) === _1) {
                y = y.times(x);
                --b;
            }
            if (b === _0) break;
            b /= _2;
            x = x.square();
        }
        return y;
    }

    BigInteger.prototype.modPow = function (exp, mod) {
        exp = parseValue(exp);
        mod = parseValue(mod);
        if (mod.isZero()) throw new Error("Cannot take modPow with modulus 0");
        var r = Integer[1],
            base = this.mod(mod);
        if (exp.isNegative()) {
            exp = exp.multiply(Integer[-1]);
            base = base.modInv(mod);
        }
        while (exp.isPositive()) {
            if (base.isZero()) return Integer[0];
            if (exp.isOdd()) r = r.multiply(base).mod(mod);
            exp = exp.divide(2);
            base = base.square().mod(mod);
        }
        return r;
    };
    NativeBigInt.prototype.modPow = SmallInteger.prototype.modPow = BigInteger.prototype.modPow;

    function compareAbs(a, b) {
        if (a.length !== b.length) {
            return a.length > b.length ? 1 : -1;
        }
        for (var i = a.length - 1; i >= 0; i--) {
            if (a[i] !== b[i]) return a[i] > b[i] ? 1 : -1;
        }
        return 0;
    }

    BigInteger.prototype.compareAbs = function (v) {
        var n = parseValue(v),
            a = this.value,
            b = n.value;
        if (n.isSmall) return 1;
        return compareAbs(a, b);
    };
    SmallInteger.prototype.compareAbs = function (v) {
        var n = parseValue(v),
            a = Math.abs(this.value),
            b = n.value;
        if (n.isSmall) {
            b = Math.abs(b);
            return a === b ? 0 : a > b ? 1 : -1;
        }
        return -1;
    };
    NativeBigInt.prototype.compareAbs = function (v) {
        var a = this.value;
        var b = parseValue(v).value;
        a = a >= 0 ? a : -a;
        b = b >= 0 ? b : -b;
        return a === b ? 0 : a > b ? 1 : -1;
    }

    BigInteger.prototype.compare = function (v) {
        // See discussion about comparison with Infinity:
        // https://github.com/peterolson/BigInteger.js/issues/61
        if (v === Infinity) {
            return -1;
        }
        if (v === -Infinity) {
            return 1;
        }

        var n = parseValue(v),
            a = this.value,
            b = n.value;
        if (this.sign !== n.sign) {
            return n.sign ? 1 : -1;
        }
        if (n.isSmall) {
            return this.sign ? -1 : 1;
        }
        return compareAbs(a, b) * (this.sign ? -1 : 1);
    };
    BigInteger.prototype.compareTo = BigInteger.prototype.compare;

    SmallInteger.prototype.compare = function (v) {
        if (v === Infinity) {
            return -1;
        }
        if (v === -Infinity) {
            return 1;
        }

        var n = parseValue(v),
            a = this.value,
            b = n.value;
        if (n.isSmall) {
            return a == b ? 0 : a > b ? 1 : -1;
        }
        if (a < 0 !== n.sign) {
            return a < 0 ? -1 : 1;
        }
        return a < 0 ? 1 : -1;
    };
    SmallInteger.prototype.compareTo = SmallInteger.prototype.compare;

    NativeBigInt.prototype.compare = function (v) {
        if (v === Infinity) {
            return -1;
        }
        if (v === -Infinity) {
            return 1;
        }
        var a = this.value;
        var b = parseValue(v).value;
        return a === b ? 0 : a > b ? 1 : -1;
    }
    NativeBigInt.prototype.compareTo = NativeBigInt.prototype.compare;

    BigInteger.prototype.equals = function (v) {
        return this.compare(v) === 0;
    };
    NativeBigInt.prototype.eq = NativeBigInt.prototype.equals = SmallInteger.prototype.eq = SmallInteger.prototype.equals = BigInteger.prototype.eq = BigInteger.prototype.equals;

    BigInteger.prototype.notEquals = function (v) {
        return this.compare(v) !== 0;
    };
    NativeBigInt.prototype.neq = NativeBigInt.prototype.notEquals = SmallInteger.prototype.neq = SmallInteger.prototype.notEquals = BigInteger.prototype.neq = BigInteger.prototype.notEquals;

    BigInteger.prototype.greater = function (v) {
        return this.compare(v) > 0;
    };
    NativeBigInt.prototype.gt = NativeBigInt.prototype.greater = SmallInteger.prototype.gt = SmallInteger.prototype.greater = BigInteger.prototype.gt = BigInteger.prototype.greater;

    BigInteger.prototype.lesser = function (v) {
        return this.compare(v) < 0;
    };
    NativeBigInt.prototype.lt = NativeBigInt.prototype.lesser = SmallInteger.prototype.lt = SmallInteger.prototype.lesser = BigInteger.prototype.lt = BigInteger.prototype.lesser;

    BigInteger.prototype.greaterOrEquals = function (v) {
        return this.compare(v) >= 0;
    };
    NativeBigInt.prototype.geq = NativeBigInt.prototype.greaterOrEquals = SmallInteger.prototype.geq = SmallInteger.prototype.greaterOrEquals = BigInteger.prototype.geq = BigInteger.prototype.greaterOrEquals;

    BigInteger.prototype.lesserOrEquals = function (v) {
        return this.compare(v) <= 0;
    };
    NativeBigInt.prototype.leq = NativeBigInt.prototype.lesserOrEquals = SmallInteger.prototype.leq = SmallInteger.prototype.lesserOrEquals = BigInteger.prototype.leq = BigInteger.prototype.lesserOrEquals;

    BigInteger.prototype.isEven = function () {
        return (this.value[0] & 1) === 0;
    };
    SmallInteger.prototype.isEven = function () {
        return (this.value & 1) === 0;
    };
    NativeBigInt.prototype.isEven = function () {
        return (this.value & BigInt(1)) === BigInt(0);
    }

    BigInteger.prototype.isOdd = function () {
        return (this.value[0] & 1) === 1;
    };
    SmallInteger.prototype.isOdd = function () {
        return (this.value & 1) === 1;
    };
    NativeBigInt.prototype.isOdd = function () {
        return (this.value & BigInt(1)) === BigInt(1);
    }

    BigInteger.prototype.isPositive = function () {
        return !this.sign;
    };
    SmallInteger.prototype.isPositive = function () {
        return this.value > 0;
    };
    NativeBigInt.prototype.isPositive = SmallInteger.prototype.isPositive;

    BigInteger.prototype.isNegative = function () {
        return this.sign;
    };
    SmallInteger.prototype.isNegative = function () {
        return this.value < 0;
    };
    NativeBigInt.prototype.isNegative = SmallInteger.prototype.isNegative;

    BigInteger.prototype.isUnit = function () {
        return false;
    };
    SmallInteger.prototype.isUnit = function () {
        return Math.abs(this.value) === 1;
    };
    NativeBigInt.prototype.isUnit = function () {
        return this.abs().value === BigInt(1);
    }

    BigInteger.prototype.isZero = function () {
        return false;
    };
    SmallInteger.prototype.isZero = function () {
        return this.value === 0;
    };
    NativeBigInt.prototype.isZero = function () {
        return this.value === BigInt(0);
    }

    BigInteger.prototype.isDivisibleBy = function (v) {
        var n = parseValue(v);
        if (n.isZero()) return false;
        if (n.isUnit()) return true;
        if (n.compareAbs(2) === 0) return this.isEven();
        return this.mod(n).isZero();
    };
    NativeBigInt.prototype.isDivisibleBy = SmallInteger.prototype.isDivisibleBy = BigInteger.prototype.isDivisibleBy;

    function isBasicPrime(v) {
        var n = v.abs();
        if (n.isUnit()) return false;
        if (n.equals(2) || n.equals(3) || n.equals(5)) return true;
        if (n.isEven() || n.isDivisibleBy(3) || n.isDivisibleBy(5)) return false;
        if (n.lesser(49)) return true;
        // we don't know if it's prime: let the other functions figure it out
    }

    function millerRabinTest(n, a) {
        var nPrev = n.prev(),
            b = nPrev,
            r = 0,
            d, t, i, x;
        while (b.isEven()) b = b.divide(2), r++;
        next: for (i = 0; i < a.length; i++) {
            if (n.lesser(a[i])) continue;
            x = bigInt(a[i]).modPow(b, n);
            if (x.isUnit() || x.equals(nPrev)) continue;
            for (d = r - 1; d != 0; d--) {
                x = x.square().mod(n);
                if (x.isUnit()) return false;
                if (x.equals(nPrev)) continue next;
            }
            return false;
        }
        return true;
    }

    // Set "strict" to true to force GRH-supported lower bound of 2*log(N)^2
    BigInteger.prototype.isPrime = function (strict) {
        var isPrime = isBasicPrime(this);
        if (isPrime !== undefined) return isPrime;
        var n = this.abs();
        var bits = n.bitLength();
        if (bits <= 64)
            return millerRabinTest(n, [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]);
        var logN = Math.log(2) * bits.toJSNumber();
        var t = Math.ceil((strict === true) ? (2 * Math.pow(logN, 2)) : logN);
        for (var a = [], i = 0; i < t; i++) {
            a.push(bigInt(i + 2));
        }
        return millerRabinTest(n, a);
    };
    NativeBigInt.prototype.isPrime = SmallInteger.prototype.isPrime = BigInteger.prototype.isPrime;

    BigInteger.prototype.isProbablePrime = function (iterations) {
        var isPrime = isBasicPrime(this);
        if (isPrime !== undefined) return isPrime;
        var n = this.abs();
        var t = iterations === undefined ? 5 : iterations;
        for (var a = [], i = 0; i < t; i++) {
            a.push(bigInt.randBetween(2, n.minus(2)));
        }
        return millerRabinTest(n, a);
    };
    NativeBigInt.prototype.isProbablePrime = SmallInteger.prototype.isProbablePrime = BigInteger.prototype.isProbablePrime;

    BigInteger.prototype.modInv = function (n) {
        var t = bigInt.zero, newT = bigInt.one, r = parseValue(n), newR = this.abs(), q, lastT, lastR;
        while (!newR.isZero()) {
            q = r.divide(newR);
            lastT = t;
            lastR = r;
            t = newT;
            r = newR;
            newT = lastT.subtract(q.multiply(newT));
            newR = lastR.subtract(q.multiply(newR));
        }
        if (!r.isUnit()) throw new Error(this.toString() + " and " + n.toString() + " are not co-prime");
        if (t.compare(0) === -1) {
            t = t.add(n);
        }
        if (this.isNegative()) {
            return t.negate();
        }
        return t;
    };

    NativeBigInt.prototype.modInv = SmallInteger.prototype.modInv = BigInteger.prototype.modInv;

    BigInteger.prototype.next = function () {
        var value = this.value;
        if (this.sign) {
            return subtractSmall(value, 1, this.sign);
        }
        return new BigInteger(addSmall(value, 1), this.sign);
    };
    SmallInteger.prototype.next = function () {
        var value = this.value;
        if (value + 1 < MAX_INT) return new SmallInteger(value + 1);
        return new BigInteger(MAX_INT_ARR, false);
    };
    NativeBigInt.prototype.next = function () {
        return new NativeBigInt(this.value + BigInt(1));
    }

    BigInteger.prototype.prev = function () {
        var value = this.value;
        if (this.sign) {
            return new BigInteger(addSmall(value, 1), true);
        }
        return subtractSmall(value, 1, this.sign);
    };
    SmallInteger.prototype.prev = function () {
        var value = this.value;
        if (value - 1 > -MAX_INT) return new SmallInteger(value - 1);
        return new BigInteger(MAX_INT_ARR, true);
    };
    NativeBigInt.prototype.prev = function () {
        return new NativeBigInt(this.value - BigInt(1));
    }

    var powersOfTwo = [1];
    while (2 * powersOfTwo[powersOfTwo.length - 1] <= BASE) powersOfTwo.push(2 * powersOfTwo[powersOfTwo.length - 1]);
    var powers2Length = powersOfTwo.length, highestPower2 = powersOfTwo[powers2Length - 1];

    function shift_isSmall(n) {
        return Math.abs(n) <= BASE;
    }

    BigInteger.prototype.shiftLeft = function (v) {
        var n = parseValue(v).toJSNumber();
        if (!shift_isSmall(n)) {
            throw new Error(String(n) + " is too large for shifting.");
        }
        if (n < 0) return this.shiftRight(-n);
        var result = this;
        if (result.isZero()) return result;
        while (n >= powers2Length) {
            result = result.multiply(highestPower2);
            n -= powers2Length - 1;
        }
        return result.multiply(powersOfTwo[n]);
    };
    NativeBigInt.prototype.shiftLeft = SmallInteger.prototype.shiftLeft = BigInteger.prototype.shiftLeft;

    BigInteger.prototype.shiftRight = function (v) {
        var remQuo;
        var n = parseValue(v).toJSNumber();
        if (!shift_isSmall(n)) {
            throw new Error(String(n) + " is too large for shifting.");
        }
        if (n < 0) return this.shiftLeft(-n);
        var result = this;
        while (n >= powers2Length) {
            if (result.isZero() || (result.isNegative() && result.isUnit())) return result;
            remQuo = divModAny(result, highestPower2);
            result = remQuo[1].isNegative() ? remQuo[0].prev() : remQuo[0];
            n -= powers2Length - 1;
        }
        remQuo = divModAny(result, powersOfTwo[n]);
        return remQuo[1].isNegative() ? remQuo[0].prev() : remQuo[0];
    };
    NativeBigInt.prototype.shiftRight = SmallInteger.prototype.shiftRight = BigInteger.prototype.shiftRight;

    function bitwise(x, y, fn) {
        y = parseValue(y);
        var xSign = x.isNegative(), ySign = y.isNegative();
        var xRem = xSign ? x.not() : x,
            yRem = ySign ? y.not() : y;
        var xDigit = 0, yDigit = 0;
        var xDivMod = null, yDivMod = null;
        var result = [];
        while (!xRem.isZero() || !yRem.isZero()) {
            xDivMod = divModAny(xRem, highestPower2);
            xDigit = xDivMod[1].toJSNumber();
            if (xSign) {
                xDigit = highestPower2 - 1 - xDigit; // two's complement for negative numbers
            }

            yDivMod = divModAny(yRem, highestPower2);
            yDigit = yDivMod[1].toJSNumber();
            if (ySign) {
                yDigit = highestPower2 - 1 - yDigit; // two's complement for negative numbers
            }

            xRem = xDivMod[0];
            yRem = yDivMod[0];
            result.push(fn(xDigit, yDigit));
        }
        var sum = fn(xSign ? 1 : 0, ySign ? 1 : 0) !== 0 ? bigInt(-1) : bigInt(0);
        for (var i = result.length - 1; i >= 0; i -= 1) {
            sum = sum.multiply(highestPower2).add(bigInt(result[i]));
        }
        return sum;
    }

    BigInteger.prototype.not = function () {
        return this.negate().prev();
    };
    NativeBigInt.prototype.not = SmallInteger.prototype.not = BigInteger.prototype.not;

    BigInteger.prototype.and = function (n) {
        return bitwise(this, n, function (a, b) { return a & b; });
    };
    NativeBigInt.prototype.and = SmallInteger.prototype.and = BigInteger.prototype.and;

    BigInteger.prototype.or = function (n) {
        return bitwise(this, n, function (a, b) { return a | b; });
    };
    NativeBigInt.prototype.or = SmallInteger.prototype.or = BigInteger.prototype.or;

    BigInteger.prototype.xor = function (n) {
        return bitwise(this, n, function (a, b) { return a ^ b; });
    };
    NativeBigInt.prototype.xor = SmallInteger.prototype.xor = BigInteger.prototype.xor;

    var LOBMASK_I = 1 << 30, LOBMASK_BI = (BASE & -BASE) * (BASE & -BASE) | LOBMASK_I;
    function roughLOB(n) { // get lowestOneBit (rough)
        // SmallInteger: return Min(lowestOneBit(n), 1 << 30)
        // BigInteger: return Min(lowestOneBit(n), 1 << 14) [BASE=1e7]
        var v = n.value,
            x = typeof v === "number" ? v | LOBMASK_I :
                typeof v === "bigint" ? v | BigInt(LOBMASK_I) :
                    v[0] + v[1] * BASE | LOBMASK_BI;
        return x & -x;
    }

    function integerLogarithm(value, base) {
        if (base.compareTo(value) <= 0) {
            var tmp = integerLogarithm(value, base.square(base));
            var p = tmp.p;
            var e = tmp.e;
            var t = p.multiply(base);
            return t.compareTo(value) <= 0 ? { p: t, e: e * 2 + 1 } : { p: p, e: e * 2 };
        }
        return { p: bigInt(1), e: 0 };
    }

    BigInteger.prototype.bitLength = function () {
        var n = this;
        if (n.compareTo(bigInt(0)) < 0) {
            n = n.negate().subtract(bigInt(1));
        }
        if (n.compareTo(bigInt(0)) === 0) {
            return bigInt(0);
        }
        return bigInt(integerLogarithm(n, bigInt(2)).e).add(bigInt(1));
    }
    NativeBigInt.prototype.bitLength = SmallInteger.prototype.bitLength = BigInteger.prototype.bitLength;

    function max(a, b) {
        a = parseValue(a);
        b = parseValue(b);
        return a.greater(b) ? a : b;
    }
    function min(a, b) {
        a = parseValue(a);
        b = parseValue(b);
        return a.lesser(b) ? a : b;
    }
    function gcd(a, b) {
        a = parseValue(a).abs();
        b = parseValue(b).abs();
        if (a.equals(b)) return a;
        if (a.isZero()) return b;
        if (b.isZero()) return a;
        var c = Integer[1], d, t;
        while (a.isEven() && b.isEven()) {
            d = min(roughLOB(a), roughLOB(b));
            a = a.divide(d);
            b = b.divide(d);
            c = c.multiply(d);
        }
        while (a.isEven()) {
            a = a.divide(roughLOB(a));
        }
        do {
            while (b.isEven()) {
                b = b.divide(roughLOB(b));
            }
            if (a.greater(b)) {
                t = b; b = a; a = t;
            }
            b = b.subtract(a);
        } while (!b.isZero());
        return c.isUnit() ? a : a.multiply(c);
    }
    function lcm(a, b) {
        a = parseValue(a).abs();
        b = parseValue(b).abs();
        return a.divide(gcd(a, b)).multiply(b);
    }
    function randBetween(a, b) {
        a = parseValue(a);
        b = parseValue(b);
        var low = min(a, b), high = max(a, b);
        var range = high.subtract(low).add(1);
        if (range.isSmall) return low.add(Math.floor(Math.random() * range));
        var digits = toBase(range, BASE).value;
        var result = [], restricted = true;
        for (var i = 0; i < digits.length; i++) {
            var top = restricted ? digits[i] : BASE;
            var digit = truncate(Math.random() * top);
            result.push(digit);
            if (digit < top) restricted = false;
        }
        return low.add(Integer.fromArray(result, BASE, false));
    }

    var parseBase = function (text, base, alphabet, caseSensitive) {
        alphabet = alphabet || DEFAULT_ALPHABET;
        text = String(text);
        if (!caseSensitive) {
            text = text.toLowerCase();
            alphabet = alphabet.toLowerCase();
        }
        var length = text.length;
        var i;
        var absBase = Math.abs(base);
        var alphabetValues = {};
        for (i = 0; i < alphabet.length; i++) {
            alphabetValues[alphabet[i]] = i;
        }
        for (i = 0; i < length; i++) {
            var c = text[i];
            if (c === "-") continue;
            if (c in alphabetValues) {
                if (alphabetValues[c] >= absBase) {
                    if (c === "1" && absBase === 1) continue;
                    throw new Error(c + " is not a valid digit in base " + base + ".");
                }
            }
        }
        base = parseValue(base);
        var digits = [];
        var isNegative = text[0] === "-";
        for (i = isNegative ? 1 : 0; i < text.length; i++) {
            var c = text[i];
            if (c in alphabetValues) digits.push(parseValue(alphabetValues[c]));
            else if (c === "<") {
                var start = i;
                do { i++; } while (text[i] !== ">" && i < text.length);
                digits.push(parseValue(text.slice(start + 1, i)));
            }
            else throw new Error(c + " is not a valid character");
        }
        return parseBaseFromArray(digits, base, isNegative);
    };

    function parseBaseFromArray(digits, base, isNegative) {
        var val = Integer[0], pow = Integer[1], i;
        for (i = digits.length - 1; i >= 0; i--) {
            val = val.add(digits[i].times(pow));
            pow = pow.times(base);
        }
        return isNegative ? val.negate() : val;
    }

    function stringify(digit, alphabet) {
        alphabet = alphabet || DEFAULT_ALPHABET;
        if (digit < alphabet.length) {
            return alphabet[digit];
        }
        return "<" + digit + ">";
    }

    function toBase(n, base) {
        base = bigInt(base);
        if (base.isZero()) {
            if (n.isZero()) return { value: [0], isNegative: false };
            throw new Error("Cannot convert nonzero numbers to base 0.");
        }
        if (base.equals(-1)) {
            if (n.isZero()) return { value: [0], isNegative: false };
            if (n.isNegative())
                return {
                    value: [].concat.apply([], Array.apply(null, Array(-n.toJSNumber()))
                        .map(Array.prototype.valueOf, [1, 0])
                    ),
                    isNegative: false
                };

            var arr = Array.apply(null, Array(n.toJSNumber() - 1))
                .map(Array.prototype.valueOf, [0, 1]);
            arr.unshift([1]);
            return {
                value: [].concat.apply([], arr),
                isNegative: false
            };
        }

        var neg = false;
        if (n.isNegative() && base.isPositive()) {
            neg = true;
            n = n.abs();
        }
        if (base.isUnit()) {
            if (n.isZero()) return { value: [0], isNegative: false };

            return {
                value: Array.apply(null, Array(n.toJSNumber()))
                    .map(Number.prototype.valueOf, 1),
                isNegative: neg
            };
        }
        var out = [];
        var left = n, divmod;
        while (left.isNegative() || left.compareAbs(base) >= 0) {
            divmod = left.divmod(base);
            left = divmod.quotient;
            var digit = divmod.remainder;
            if (digit.isNegative()) {
                digit = base.minus(digit).abs();
                left = left.next();
            }
            out.push(digit.toJSNumber());
        }
        out.push(left.toJSNumber());
        return { value: out.reverse(), isNegative: neg };
    }

    function toBaseString(n, base, alphabet) {
        var arr = toBase(n, base);
        return (arr.isNegative ? "-" : "") + arr.value.map(function (x) {
            return stringify(x, alphabet);
        }).join('');
    }

    BigInteger.prototype.toArray = function (radix) {
        return toBase(this, radix);
    };

    SmallInteger.prototype.toArray = function (radix) {
        return toBase(this, radix);
    };

    NativeBigInt.prototype.toArray = function (radix) {
        return toBase(this, radix);
    };

    BigInteger.prototype.toString = function (radix, alphabet) {
        if (radix === undefined) radix = 10;
        if (radix !== 10) return toBaseString(this, radix, alphabet);
        var v = this.value, l = v.length, str = String(v[--l]), zeros = "0000000", digit;
        while (--l >= 0) {
            digit = String(v[l]);
            str += zeros.slice(digit.length) + digit;
        }
        var sign = this.sign ? "-" : "";
        return sign + str;
    };

    SmallInteger.prototype.toString = function (radix, alphabet) {
        if (radix === undefined) radix = 10;
        if (radix != 10) return toBaseString(this, radix, alphabet);
        return String(this.value);
    };

    NativeBigInt.prototype.toString = SmallInteger.prototype.toString;

    NativeBigInt.prototype.toJSON = BigInteger.prototype.toJSON = SmallInteger.prototype.toJSON = function () { return this.toString(); }

    BigInteger.prototype.valueOf = function () {
        return parseInt(this.toString(), 10);
    };
    BigInteger.prototype.toJSNumber = BigInteger.prototype.valueOf;

    SmallInteger.prototype.valueOf = function () {
        return this.value;
    };
    SmallInteger.prototype.toJSNumber = SmallInteger.prototype.valueOf;
    NativeBigInt.prototype.valueOf = NativeBigInt.prototype.toJSNumber = function () {
        return parseInt(this.toString(), 10);
    }

    function parseStringValue(v) {
        if (isPrecise(+v)) {
            var x = +v;
            if (x === truncate(x))
                return supportsNativeBigInt ? new NativeBigInt(BigInt(x)) : new SmallInteger(x);
            throw new Error("Invalid integer: " + v);
        }
        var sign = v[0] === "-";
        if (sign) v = v.slice(1);
        var split = v.split(/e/i);
        if (split.length > 2) throw new Error("Invalid integer: " + split.join("e"));
        if (split.length === 2) {
            var exp = split[1];
            if (exp[0] === "+") exp = exp.slice(1);
            exp = +exp;
            if (exp !== truncate(exp) || !isPrecise(exp)) throw new Error("Invalid integer: " + exp + " is not a valid exponent.");
            var text = split[0];
            var decimalPlace = text.indexOf(".");
            if (decimalPlace >= 0) {
                exp -= text.length - decimalPlace - 1;
                text = text.slice(0, decimalPlace) + text.slice(decimalPlace + 1);
            }
            if (exp < 0) throw new Error("Cannot include negative exponent part for integers");
            text += (new Array(exp + 1)).join("0");
            v = text;
        }
        var isValid = /^([0-9][0-9]*)$/.test(v);
        if (!isValid) throw new Error("Invalid integer: " + v);
        if (supportsNativeBigInt) {
            return new NativeBigInt(BigInt(sign ? "-" + v : v));
        }
        var r = [], max = v.length, l = LOG_BASE, min = max - l;
        while (max > 0) {
            r.push(+v.slice(min, max));
            min -= l;
            if (min < 0) min = 0;
            max -= l;
        }
        trim(r);
        return new BigInteger(r, sign);
    }

    function parseNumberValue(v) {
        if (supportsNativeBigInt) {
            return new NativeBigInt(BigInt(v));
        }
        if (isPrecise(v)) {
            if (v !== truncate(v)) throw new Error(v + " is not an integer.");
            return new SmallInteger(v);
        }
        return parseStringValue(v.toString());
    }

    function parseValue(v) {
        if (typeof v === "number") {
            return parseNumberValue(v);
        }
        if (typeof v === "string") {
            return parseStringValue(v);
        }
        if (typeof v === "bigint") {
            return new NativeBigInt(v);
        }
        return v;
    }
    // Pre-define numbers in range [-999,999]
    for (var i = 0; i < 1000; i++) {
        Integer[i] = parseValue(i);
        if (i > 0) Integer[-i] = parseValue(-i);
    }
    // Backwards compatibility
    Integer.one = Integer[1];
    Integer.zero = Integer[0];
    Integer.minusOne = Integer[-1];
    Integer.max = max;
    Integer.min = min;
    Integer.gcd = gcd;
    Integer.lcm = lcm;
    Integer.isInstance = function (x) { return x instanceof BigInteger || x instanceof SmallInteger || x instanceof NativeBigInt; };
    Integer.randBetween = randBetween;

    Integer.fromArray = function (digits, base, isNegative) {
        return parseBaseFromArray(digits.map(parseValue), parseValue(base || 10), isNegative);
    };

    return Integer;
})();

const main = input => {
    let q = input[0].split(' ');
    let a = BigInt2(q[0]),b = BigInt2(q[1]),c = BigInt2(q[2]),d = BigInt2(q[3]);
    const euclid = (x,y) => {
        while(1) {
            if (x == 0) return y;
            if (y == 0) return x;
            if (x>y) x = x.mod(y);
            else if (y>x) y = y.mod(x);
            else return x;
        }
    };
    let l = c.multiply(d).divide(euclid(c,d));
    a = a.minus(1);
    let asum = a;
    asum = asum.minus(a.divide(c));
    asum = asum.minus(a.divide(d));
    asum = asum.add(a.divide(l));
    let bsum = b;
    bsum = bsum.minus(b.divide(c));
    bsum = bsum.minus(b.divide(d));
    bsum = bsum.add(b.divide(l));

    let ans = bsum.minus(asum).value;
    // console.log(ans+'');
    if (ans instanceof Array) {
        let ansvalue = '';
        for(let i=0; i<ans.length; i++) {
            let ansstr = ans[i]+'';
            if (i!=ans.length-1) {

                while(ansstr.length < 7) {
                    ansstr = '0' + ansstr;
                }
            }
            ansvalue = ansstr+ansvalue;
        }
        console.log(ansvalue);
    } else {
        console.log(ans+'');

    }
    // ans = [ '3627368', '507113', '5321' ];
};
main(require("fs").readFileSync("/dev/stdin", "utf8").split('\n'));


var natural={};

natural.successor=function(a){
    var ret=a.split(' ');
    for(var i=ret.length-1;i>=0;i--){
        if(ret[i]==='9'){
            ret[i]=0;
        }else{
            ret[i]=(ret[i]-0)+1+'';
            break;
        }
        if(i===0){
            ret.unshift('1');
        }
    }
    return ret.join('');
}

natural.add=function(...nums){//あまりにも多いnumsは扱えません
    var array=[];
    var max=0;
    nums.forEach(e=>{
        if(max<e.length){
            max=e.length;
        }
    });
    nums.forEach(e=>{
        array.push('0'.repeat(max-e.length)+e);
    });
    var temp;
    var ret='';
    var c=0;//繰り上がり
    for(var i=max-1;i>=0;i--){
        temp=c;
        array.forEach(e=>{
            temp+=(e[i]-0);
        });
        c=Math.floor(temp/10);
        ret=(temp%10)+ret;
    }
    return (c===0?'':c)+ret;
}

natural.subtract=function(a,b){
    if(this.isFormerLarger(b,a)){
        return false;
    }
    var l=b.length;
    var inversedB=b.split('').map(e=>{
        return 9-e;
    }).join('');
    while(inversedB[0]==='0'){
        inversedB=inversedB.slice(1);
    }
    var ret=natural.add(a,inversedB,'1').split('');
    for(var i=ret.length-l-1;i>=0;i--){
        if(ret[i]==='0'){
            ret[i]='9';
        }else{
            ret[i]=(ret[i]-1)+'';
            break;
        }
    }
    while(ret[0]==='0'){
        ret.shift();
    }
    return ret.join('')||'0';
}

natural.isFormerLarger=function(a,b){
    if(a.length>b.length){
        return true;
    }else if(a.length<b.length){
        return false;
    }
    for(var i=0;i<a.length;i++){
        if(a[i]>b[i]){
            return true;
        }else if(a[i]<b[i]){
            return false;
        }
    }
    return false;
}

natural.product=function(...nums){//あまりにも多いnumsは扱えません
    if(nums.some(e=>{return e==='0';})){
        return '0';
    }
    var pointer=new Array(nums.length);
    pointer.fill(0);
    var zeros=0;
    var array=[];
    var str;
    loop1:
    while(true){
        str=1;
        for(var i=0;i<nums.length;i++){
            str*=nums[i][nums[i].length-1-pointer[i]];
        }
        if(str!==0){
            str+='0'.repeat(zeros);
            array.push(str);
        }
        for(var i=0;i<pointer.length;i++){
            if(pointer[i]===nums[i].length-1){
                pointer[i]=0;
                zeros-=nums[i].length-1;
            }else{
                pointer[i]++;
                zeros++;
                break;
            }
            if(i===pointer.length-1){
                break loop1;
            }
        }
    }
    return natural.add(...array);
}

natural.divide=function(a,b){
    if(b==='0'){
        return false;
    }
    if(this.isFormerLarger(b,a)){
        return '0';
    }
    var workbench='';
    var vault=a+'';
    var ret='';
    do{
        workbench+=vault[0];
        vault=vault.slice(1);
        if(workbench==='0'){
            ret+='0';
            workbench='';
            continue;
        }
        for(var i=1;i<=10;i++){
            if(natural.isFormerLarger(natural.product(b,i+''),workbench)){
                if(i>1){
                    workbench=natural.subtract(workbench,natural.product((i-1)+'',b));
                }
                ret+=(i-1)+'';
                break;
            }else if(natural.product(b,i+'')===workbench){
                workbench='';
                ret+=i+'';
                break;
            }
        }
    }while(vault.length>0)
    while(ret[0]==='0'){
        ret=ret.slice(1);
    }
    return ret;
}

natural.mod=function(a,b){
    if(b==='0'){
        return false;
    }
    return natural.subtract(a,natural.product(b,natural.divide(a,b)));
}

natural.factorial=function(a){
    var ret='1';
    for(var i=2;i<=a;i++){
        ret=natural.product(ret,i+'');
    }
    return ret;
}

natural.power=function(a,b){
    if(a==='0'&&b==='0'){
        return false;
    }
    if(a==='0'){
        return '0';
    }
    if(b==='0'){
        return '1';
    }
    var array=[];
    var next;
    var flg;
    while(b!=='0'.repeat(b.length)){
        next=''
        flg=0;
        for(var i=0;i<b.length;i++){
            next+=Math.floor(b[i]/2)+flg;
            flg=(b[i]%2)*5;
        }
        array.push(flg===5);
        b=next;
    }
    var memo=[a];
    for(var i=1;i<array.length;i++){
        memo.push(natural.product(memo[memo.length-1],memo[memo.length-1]));
    }
    var elem=memo.filter((e,i)=>{
        return array[i];
    });
    return natural.product(...elem);
}

natural.lcm=function(...nums){
    var temp=nums[0];
    var a,b;
    for(var i=1;i<nums.length;i++){
        a=temp;
        b=nums[i];
        while(true){
            a=natural.mod(a,b);
            if(a==='0'){
                temp=natural.divide(natural.product(temp,nums[i]),b);
                break;
            }
            b=natural.mod(b,a);
            if(b==='0'){
                temp=natural.divide(natural.product(temp,nums[i]),a);
                break;
            }
        }
    }
    return temp;
}

var rational={};

rational.add=function(...nums){

}

function Main(input) {
  input=input.split("\n");
  if(input[input.length-1]===''){
    input.pop();
  }
  const A=input[0].split(' ')[0];
  const B=input[0].split(' ')[1];
  const C=input[0].split(' ')[2];
  const D=input[0].split(' ')[3];
  var ret=natural.subtract(B,A);
  ret=natural.add(ret,'1');
  [C,D].forEach(e=>{
    ret=natural.subtract(ret,natural.subtract(natural.divide(B,e),natural.divide(natural.subtract(A,'1'),e)));
  });
  var e=natural.lcm(D,C);
  ret=natural.add(ret,natural.subtract(natural.divide(B,e),natural.divide(natural.subtract(A,'1'),e)));
  console.log(ret);

}

//*この行以降は編集しないでください（標準入出力から一度に読み込み、Mainを呼び出します）
Main(require("fs").readFileSync("/dev/stdin", "utf8"));


"use strict"
const create = () => {
    const input = require("fs").readFileSync("/dev/stdin", "utf8").trim().split("\n");
    const res = {
        "list": input, "index": 0, "max": input.length,
        "hasNext": function () { return this.index < this.max },
        "next": function () { if (!this.hasNext()) { throw "ArrayIndexOutOfBoundsException"; } else { return this.list[this.index++]; } }
    };
    return res;
}
const o = create();
const next = () => o.next()
const nextInt = () => parseInt(o.next())
const nextStrArray = () => o.next().split(" ")
const nextIntArray = () => o.next().split(" ").map(el => parseInt(el))
const nextCharArray = () => o.next().split("")
const hasNext = () => o.hasNext()
const myout = (...x) => console.log(...x)
const euc = (x, y) => {
    if (x == 0) return y
    if (y == 0) return x
    if (x > y) {
        return euc(x % y, y)
    } else {
        return euc(y % x, x)
    }
}
const Main = () => {
    const [A, B, C, D] = next().split(" ").map(el => BigInt(el))
    //B
    let bc = B / C
    let bd = B / D
    let min = C * D / euc(C, D)
    let bcd = B / min
    let b = B - bc - bd + bcd
    //A
    let ac = (A-1n) / C
    let ad = (A-1n) / D
    let acd = (A-1n) / min
    let a = A-1n - ac - ad + acd

    console.log(Number(b - a))
}
Main()


const input = require("fs").readFileSync("/dev/stdin", "utf8").split("\n");

const N = input[0].split(' ').map(item => parseInt(item))[0]
input.shift()
input.pop()

AB = input.map(item => item.split(' ').map(item2 => parseInt(item2)))
const A = AB.map(item => item[0])
const B = AB.map(item => item[1])

// console.log(AB)
AB.sort((a, b) => a[1] - b[1])
// console.log(AB)

count = 0
for (let i = 0; i < N; i++) {
    count += AB[i][0]
    if (count > AB[i][1]) {
        console.log('No')
        return
    }
}
console.log('Yes')


package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

func out(x ...interface{}) {
	fmt.Println(x...)
}

var sc = bufio.NewScanner(os.Stdin)

func getInt() int {
	sc.Scan()
	i, e := strconv.Atoi(sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func getString() string {
	sc.Scan()
	return sc.Text()
}

// min, max, asub, absなど基本関数
func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func asub(a, b int) int {
	if a > b {
		return a - b
	}
	return b - a
}

func abs(a int) int {
	if a >= 0 {
		return a
	}
	return -a
}

func lowerBound(a []int, x int) int {
	idx := sort.Search(len(a), func(i int) bool {
		return a[i] >= x
	})
	return idx
}

func upperBound(a []int, x int) int {
	idx := sort.Search(len(a), func(i int) bool {
		return a[i] > x
	})
	return idx
}

// GCD : greatest common divisor (GCD) via Euclidean algorithm
func GCD(a, b int) int {
	for b != 0 {
		t := b
		b = a % b
		a = t
	}
	return a
}

// LCM : find Least Common Multiple (LCM) via GCD
func LCM(a, b int, integers ...int) int {
	result := a / GCD(a, b) * b

	for i := 0; i < len(integers); i++ {
		result = LCM(result, integers[i])
	}

	return result
}
func main() {
	sc.Split(bufio.ScanWords)
	A, B, C, D := getInt(), getInt(), getInt(), getInt()

	n := B - A + 1

	E := LCM(C, D)

	c := B/C - (A-1)/C
	d := B/D - (A-1)/D
	e := B/E - (A-1)/E

	out(n - c - d + e)
}


package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func out(x ...interface{}) {
	fmt.Println(x...)
}

var sc = bufio.NewScanner(os.Stdin)

func getInt() int {
	sc.Scan()
	i, e := strconv.Atoi(sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func getString() string {
	sc.Scan()
	return sc.Text()
}

// min, max, asub, absなど基本関数
func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func asub(a, b int) int {
	if a > b {
		return a - b
	}
	return b - a
}

func abs(a int) int {
	if a >= 0 {
		return a
	}
	return -a
}

// GCD : greatest common divisor (GCD) via Euclidean algorithm
func GCD(a, b int) int {
	for b != 0 {
		t := b
		b = a % b
		a = t
	}
	return a
}

// LCM : find Least Common Multiple (LCM) via GCD
func LCM(a, b int, integers ...int) int {
	result := a / GCD(a, b) * b

	for i := 0; i < len(integers); i++ {
		result = LCM(result, integers[i])
	}

	return result
}

func main() {
	sc.Split(bufio.ScanWords)

	A, B, C, D := getInt(), getInt(), getInt(), getInt()
	A--

	lcm := LCM(C, D)
	t := B / lcm
	f := A / lcm
	tc := B / C
	fc := A / C
	td := B / D
	fd := A / D

	ans := B - A
	ans -= tc - fc
	ans -= td - fd
	ans += t - f
	out(ans)
}


package main

import (
	"bufio"
	"fmt"
	"io"
	"os"
	"sort"
	"strconv"
)

func main() {
	a := readi64()
	b := readi64()
	c := readi64()
	d := readi64()

	divC := (b / c) - ((a - 1) / c)
	divD := (b / d) - ((a - 1) / d)
	cd := lcm64(c, d)
	divCD := (b / cd) - ((a - 1) / cd)

	ans := (b - (a - 1)) - (divC + divD - divCD)

	fmt.Println(ans)
}

func lcm64(a, b int64) int64 {
	return (a * b) / gcd64(a, b)
}

func gcd64(a, b int64) int64 {
	if b == 0 {
		return a
	}
	return gcd64(b, a%b)
}

/*-------------------utilities-------------------*/

func abs(x int) int {
	if x < 0 {
		return -x
	}
	return x
}

func min(x, y int) int {
	if x < y {
		return x
	}
	return y
}

func max(x, y int) int {
	if x > y {
		return x
	}
	return y
}

func chmin(x *int, y int) bool {
	if *x > y {
		*x = y
		return true
	}
	return false
}

func chmax(x *int, y int) bool {
	if *x < y {
		*x = y
		return true
	}
	return false
}

func gcd(a, b int) int {
	if b == 0 {
		return a
	}
	return gcd(b, a%b)
}

func lcm(a, b int) int {
	return (a * b) / gcd(a, b)
}

func comb(n, k int) int {
	if n < k {
		return 0
	}
	if n < 0 || k < 0 {
		return 0
	}
	return fac[n] * (finv[k] * finv[n-k] % MOD) % MOD
}

func permutations(arr []int) [][]int {
	var helper func([]int, int)
	res := [][]int{}

	helper = func(arr []int, n int) {
		if n == 1 {
			tmp := make([]int, len(arr))
			copy(tmp, arr)
			res = append(res, tmp)
		} else {
			for i := 0; i < n; i++ {
				helper(arr, n-1)
				if n%2 == 1 {
					tmp := arr[i]
					arr[i] = arr[n-1]
					arr[n-1] = tmp
				} else {
					tmp := arr[0]
					arr[0] = arr[n-1]
					arr[n-1] = tmp
				}
			}
		}
	}
	helper(arr, len(arr))
	return res
}

func isPrime(n int) bool {
	if n == 1 {
		return false
	}
	for i := 2; i*i <= n; i++ {
		if n%i == 0 {
			return false
		}
	}
	return true
}

func divisor(n int) (res []int) {
	for i := 1; i*i <= n; i++ {
		if n%i == 0 {
			res = append(res, i)
			if i*i != n {
				res = append(res, n/i)
			}
		}
	}
	sort.Ints(res)
	return
}

/*-------------------init-------------------*/

const (
	INF = 1000000000000000000
	MOD = 1e9 + 7

	COMB_MAX = 510000
)

var (
	readString func() string
)

var (
	fac  = [COMB_MAX]int{}
	finv = [COMB_MAX]int{}
	inv  = [COMB_MAX]int{}
)

func init() {
	readString = newReadString(os.Stdin)
}

func combInit() {
	fac[0] = 1
	fac[1] = 1
	finv[0] = 1
	finv[1] = 1
	inv[1] = 1
	for i := 2; i < COMB_MAX; i++ {
		fac[i] = fac[i-1] * i % MOD
		inv[i] = MOD - inv[MOD%i]*(MOD/i)%MOD
		finv[i] = finv[i-1] * inv[i] % MOD
	}
}

/*-------------------inputs-------------------*/

func readi() int {
	return int(readi64())
}

func readi64() int64 {
	i, err := strconv.ParseInt(readString(), 0, 64)
	if err != nil {
		panic(err.Error())
	}
	return i
}

func readf() float64 {
	f, err := strconv.ParseFloat(readString(), 64)
	if err != nil {
		panic(err.Error())
	}
	return f
}

func newReadString(ior io.Reader) func() string {
	r := bufio.NewScanner(ior)
	r.Buffer(make([]byte, 1024), int(1e+11))
	r.Split(bufio.ScanWords)

	return func() string {
		if !r.Scan() {
			panic("Scan failed")
		}
		return r.Text()
	}
}


package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func init() {
	sc.Split(bufio.ScanWords)
	sc.Buffer(make([]byte, 1024*1024), bufio.MaxScanTokenSize)
}

func nextInt() int {
	sc.Scan()
	i, e := strconv.Atoi(sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func main() {
	A := nextInt()
	B := nextInt()
	C := nextInt()
	D := nextInt()
	E := lcm(C, D)
	ANS := B - A - (B / C) - (B / D) + ((A - 1) / C) + ((A - 1) / D) + (B / E) + 1
	fmt.Println(ANS)
}

func gcd(a, b int) int {
	if b > a {
		a, b = b, a
	}
	for b != 0 {
		t := b
		b = a % b
		a = t
	}
	return a
}

func lcm(a, b int) int {
	return a * b / gcd(a, b)
}


package main

import "fmt"

func main() {
	var a, b, c, d int
	fmt.Scanf("%d %d %d %d", &a, &b, &c, &d)

	// 一番最初に割り切れるやつ

	cleft := a + a%c
	dleft := a + a%d

	cdleft := a + a%(c*d)

	ccount := int((b - cleft) / c)
	dcount := int((b - dleft) / d)
	cdcount := int((b - cdleft) / (c * d))

	ans := (b - a) - (ccount + dcount - cdcount)

	fmt.Println(ans)
}


package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

var sc = bufio.NewReaderSize(os.Stdin, 1024*1024*1)

func main() {
	list := getStdinIntArr64()
	var A int64 = list[0]
	var B int64 = list[1]
	var C int64 = list[2]
	var D int64 = list[3]

	var cnt int64 = B - A + 1

	if A%C == 0 {
		cnt -= (B-A)/C + 1
	} else {
		cnt -= (B - A) / C
	}

	if A%D == 0 {
		cnt -= (B-A)/D + 1
	} else {
		cnt -= (B - A) / D
	}

	l := lcm(C, D)
	if A%l == 0 {
		cnt += (B-A)/l + 1
	} else {
		cnt += (B - A) / l
	}

	fmt.Printf("%d\n", cnt)
}

func gcd(a, b int64) int64 {
	if b == 0 {
		return a
	}
	return gcd(b, a%b)
}
func lcm(a, b int64) int64 {
	return a * b / gcd(a, b)
}

func getStdin() string {
	return readLine()
}
func getStdinInt() int {
	str := getStdin()
	rtn, _ := strconv.Atoi(str)
	return rtn
}
func getStdinInt64() int64 {
	str := getStdin()
	rtn, _ := strconv.ParseInt(str, 10, 64)
	return rtn
}
func getStdinIntArr() []int {
	str := getStdin()
	list := strings.Split(str, " ")
	rtn := make([]int, len(list))
	for idx, val := range list {
		rtn[idx], _ = strconv.Atoi(val)
	}
	return rtn
}

func getStdinArr() []string {
	str := getStdin()
	list := strings.Split(str, " ")
	return list
}

func getStdinIntArr64() []int64 {
	str := getStdin()
	list := strings.Split(str, " ")
	rtn := make([]int64, len(list))
	for idx, val := range list {
		rtn[idx], _ = strconv.ParseInt(val, 10, 64)
	}
	return rtn
}

func readLine() string {
	buf := make([]byte, 0, 0)
	for {
		l, p, e := sc.ReadLine()
		if e != nil {
			panic(e)
		}
		buf = append(buf, l...)
		if !p {
			break
		}
	}
	return string(buf)
}


A,B,C,D = gets.split.map(&:to_i)
e = C.lcm(D)
a = A - 1
x = a/C + a/D - a/e
y = B/C + B/D - B/e
z = y - x
puts (B-A+1) - z


#input of int(split by space)
def get_i()
  return gets.chomp.split(" ").map(&:to_i)
end
#input of float(split by space)
def get_f()
  return gets.chomp.split(" ").map(&:to_f)
end
#input of string(split by space)
def get()
  return gets.chomp.split(" ")
end
#input of string(split per one character)
def get_nsp()
  return gets.chomp.split("")
end
#yes or no decision
def yn_judge(bool,y="Yes",n="No")
  return bool ? y : n
end
#create of array
def array(size1,init=nil,size2=-1)
  if size2==-1
    return Array.new(size1){init}
  else
    return Array.new(size2){Array.new(size1){init}}
  end
end

def max(a,b)
    return a>b ? a : b
end

def min(a,b)
    return a>b ? b : a
end

INF=Float::INFINITY

def add(x,y)
    return (x%y).zero? ? 1 : 0
end
A,B,C,D=get_i
puts (B-A+1)-((B/C-A/C+add(A,C))+(B/D-A/D+add(A,D))-(B/C.lcm(D)-A/C.lcm(D)+add(A,C.lcm(D))))


A,B,C,D=$<.read.split.map(&:to_i)

a = A-1
x = B - B/C - B/D + B/C.lcm(D)
y = a - a/C - a/D + a/C.lcm(D)

puts x-y


a,b,c,d = gets.chomp.split(' ').map(&:to_i)
c_a = (a/c.to_f).ceil
d_a = (a/d.to_f).ceil
c_b = b/c
d_b = b/d
lcm = c.lcm(d)
lcm_a = (a/lcm.to_f).ceil
lcm_b = b/lcm
# puts "#{a}と#{b}の間の#{c}の倍数の個数は#{(b/c - (a/c.to_f).ceil ) + 1} "
# puts "#{a}と#{b}の間の#{d}の倍数の個数は#{(b/d - (a/d.to_f).ceil) + 1}"
# puts "#{a}と#{b}の間の#{c}と#{d}の公倍数の個数は#{lcm_b - lcm_a + 1}"
puts b - a + 1 - (c_b - c_a + 1) - (d_b - d_a + 1) + (lcm_b - lcm_a + 1)


a,b,c,d = gets.chomp.split(' ').map(&:to_i)
c_a = (a/c.to_f).ceil
d_a = (a/d.to_f).ceil
c_b = b/c
d_b = b/d
lcm = c.lcm(d)
lcm_a = (a/lcm).ceil
lcm_b = b/lcm

puts b - a + 1 - (c_b - c_a+1) - (d_b - d_a+1) + (lcm_b - lcm_a)


a,b,c,d = gets.strip.split.map(&:to_i)
s = b.to_f/c-((a-1).to_f/c)
t = b.to_f/d-((a-1).to_f/d)
e = c.lcm(d)
u = b.to_f/e-((a-1).to_f/e)
puts b-a+1-(s+t-u)


#[allow(unused_imports)]
use std::collections::HashSet;

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}

fn main() {
    let abcd = read_vec::<u64>();
    let a = abcd[0];
    let b = abcd[1];
    let c = abcd[2];
    let d = abcd[3];

    let answer = solve(a, b, c, d);
    println!("{}", answer);
}

fn solve(a: u64, b:u64, c:u64, d:u64) -> u64 {
    let total = b - a + 1;
    let cc = b / c  - (a - 1) / c;
    let dd = b / d - (a - 1) / d;

    let l = lcm(c, d);
    let ll = b / l - (a - 1) / l;

    //println!("{}, {}, {}, {}", total, cc, dd, ll);

    return total - cc - dd + ll;
}

fn lcm(a: u64, b: u64) -> u64 {
    return a * b / gcd(a, b)
}

fn gcd(a: u64, b: u64) -> u64 {
    let mut m : u64 = a;
    let mut n : u64 = b;
    if m < n {
        m = b;
        n = a;
    }

    loop {
        let r = m % n;
        if r == 0 {
            return n;
        }
        m = n;
        n = r;
    }
}


fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|s| s.parse().ok().unwrap())
        .collect()
}

fn gcd(a: usize, b: usize) -> usize {
    if a % b == 0 {
        b
    } else {
        gcd(b, a % b)
    }
}
fn lcm(a: usize, b:usize) -> usize {
    a / gcd(a, b) * b
}

fn main() {
    let input = read_vec::<usize>();
    let (a,b,c,d) = (input[0], input[1], input[2], input[3]);

    let mut count = b - a + 1;

    let c_div = b / c - (a-1) / c;
    let d_div = b / d - (a-1) / d;
    let lcm = lcm(c, d);
    let lcm_div = b / lcm - (a-1) / lcm;

    count -= c_div;
    count -= d_div;
    count += lcm_div;

    println!("{}", count);
}


use std::io::*;
fn gcd(a: u64, b: u64) -> u64 {
    if b == 0 {
        return a;
    }
    gcd(b, a % b)
}
fn lcm(a: u64, b: u64) -> u64 {
    a / gcd(a, b) * b
}
fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let a: u64 = itr.next().unwrap().parse::<u64>().unwrap() - 1;
    let b: u64 = itr.next().unwrap().parse().unwrap();
    let c: u64 = itr.next().unwrap().parse().unwrap();
    let d: u64 = itr.next().unwrap().parse().unwrap();

    let l = lcm(c, d);
    let x = b + b / l - b / c - b / d;
    let y = a + a / l - a / c - a / d;

    println!("{}", x - y);
}


fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().split_whitespace().map(|e| e.parse().ok().unwrap()).collect()
}

fn read_vec2<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
    let mut v2 = Vec::new();
    for _ in 0..n {
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).ok();
        let v = s.trim().split_whitespace()
            .map(|e| e.parse().ok().unwrap()).collect();
        v2.push(v);
    }
    v2
}

fn gcd(a:u128, b:u128) -> u128 {

    let mut a = a;
    let mut b = b;
    let mut tmp = 0;
    if a < b {
        tmp = a;
        a = b;
        b = tmp;
    }

    let mut r = a % b;
    while r !=0 {
        a = b;
        b = r;
        r = a % b;
    }

    b
}

fn canti() {

    let data: Vec<u128> = read_vec();

    let lcm = data[2]*data[3]/gcd(data[2],data[3]);
    let a = data[1] - ( data[1]/data[2] + data[1]/data[3] - data[1]/lcm) ;
    let b = data[0]-1 - ( (data[0]-1)/data[2] + (data[0]-1)/data[3] - data[0]/lcm);

    println!("{}", a-b);
}

fn main() {
    canti();
}


fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().split_whitespace().map(|e| e.parse().ok().unwrap()).collect()
}

fn read_vec2<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
    let mut v2 = Vec::new();
    for _ in 0..n {
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).ok();
        let v = s.trim().split_whitespace()
            .map(|e| e.parse().ok().unwrap()).collect();
        v2.push(v);
    }
    v2
}

fn gcd(a:usize, b:usize) -> usize {

    let mut a = a;
    let mut b = b;
    let mut tmp = 0;
    if a < b {
        tmp = a;
        a = b;
        b = tmp;
    }

    let mut r = a % b;
    while r !=0 {
        a = b;
        b = r;
        r = a % b;
    }

    b
}

fn canti() {

    let data: Vec<usize> = read_vec();

    let lcm = data[2]*data[3]/gcd(data[2],data[3]);
    let a = data[1] - ( data[1]/data[2] + data[1]/data[3] - data[1]/lcm) ;
    let b = data[0]-1 - ( (data[0]-1)/data[2] + (data[0]-1)/data[3] - data[0]/lcm);

    println!("{}", a-b);
}

fn main() {
    canti();
}


let i=readLine()!.characters.split(" ").map{Int(String($0))!},C=i[2],D=i[3];func f(x:Int)->Int{return i[1]/x-(i[0]-1)/x};func g(x:Int,_ y:Int)->Int{return y>0 ?g(y,x%y):x};print(f(1)-f(C)-f(D)+f(C*D/g(C,D)))


func gcd(x: Int, _ y: Int) -> Int {
    if y == 0 {
        return x
    } else {
        return gcd(y, x%y)
    }
}
func lcm(x: Int, _ y: Int) -> Int {
    return x * y / gcd(x, y)
}
let input = readLine()!.characters.split(" ").map{Int(String($0))!}
let (A, B, C, D) = (input[0], input[1], input[2], input[3])
let tmp = lcm(C, D)
let tmp1 = B/C - (A-1)/C        // AからBまでのうちCで割り切れる数の個数
let tmp2 = B/D - (A-1)/D        // AからBまでのうちDで割り切れる数の個数
let tmp3 = B/tmp - (A-1)/tmp    // AからBまでのうちCとD両方で割り切れる数の個数
let tmp4 = tmp1 + tmp2 - tmp3   // AからBまでのうちCもしくはDで割り切れる数の個数
print(B - A + 1 - tmp4)


func gcd(x: Int, _ y: Int) -> Int {
    if y == 0 {
        return x
    } else {
        return gcd(y, x%y)
    }
}
let input = readLine()!.characters.split(" ").map{Int(String($0))!}
let (A, B, C, D) = (input[0]-1, input[1], input[2], input[3])
let tmp = C*D / gcd(C, D)
let tmp1 = B/C - A/C            // (A...B)でCで割り切れる数の個数
let tmp2 = B/D - A/D            // (A...B)でDで割り切れる数の個数
let tmp3 = B/tmp - A/tmp        // (A...B)で(C AND D)で割り切れる数の個数
let tmp4 = tmp1 + tmp2 - tmp3   // (A...B)で(C XOR D)で割り切れる数の個数
print(B - A - tmp4)             // (A...B)で(C AND D)で割り切れない数


let input = readLine()!.characters.split(" ").map{Int(String($0))!}
let (A, B, C, D) = (input[0], input[1], input[2], input[3])
let tmp = lcm(C, D)
let tmp1 = B/C - (A-1)/C        // AからBまでのうちCで割り切れる数の個数
let tmp2 = B/D - (A-1)/D        // AからBまでのうちDで割り切れる数の個数
let tmp3 = B/tmp - (A-1)/tmp    // AからBまでのうちCとD両方で割り切れる数の個数
let tmp4 = tmp1 + tmp2 - tmp3   // AからBまでのうちCもしくはDで割り切れる数の個数
print(B - A + 1 - tmp4)