


"""simple docstring"""





def      _snake_case						(						_snake_case				:			float ,   _snake_case				:			list[float]			)     ->   Tuple:
      if discount_rate < 0:
            raise ValueError('''Discount rate cannot be negative'''			)
      if not cash_flows:
            raise ValueError('''Cash flows list cannot be empty'''			)
      lowerCAmelCase					:	List[str]       =   sum(
          cash_flow / ((1 + discount_rate) ** i) for i, cash_flow in enumerate(_snake_case			)			)
      return round(_snake_case ,   ndigits=2			)


if __name__ == "__main__":
 import doctest

 doctest.testmod()






"""simple docstring"""





def      _snake_case						(						_snake_case				:			int = 4000000			):
      lowerCAmelCase					:	int       =   [0, 1]
      lowerCAmelCase					:	List[str]       =   0
      while fib[i] <= n:
            fib.append(fib[i] + fib[i + 1]			)
            if fib[i + 2] > n:
                  break
            i += 1
      lowerCAmelCase					:	int       =   0
      for j in range(len(_snake_case			) - 1			):
            if fib[j] % 2 == 0:
                  total += fib[j]

      return total


if __name__ == "__main__":
 print(f"""{solution() = }""")


