Envío 587

Código

import math

n = int(input())
numbers = [int(number) for number in input().split()]

assert len(numbers) == n

split_position = math.inf
for i in range(1, n + 1):
    left_sum = sum(numbers[:i])
    right_sum = sum(numbers[i:])
    if right_sum < 0 and left_sum > 0 and i < split_position:
        split_position = i

if split_position != math.inf:
    print(split_position)
else:
    print("Impossible")