Envío 4408

Código

a = []
N = 0
sum_total = 0
partial_sum = 0

N = int(input())

for num in input().split(' '):
    x = int(num)
    sum_total += x
    a.append(x)

for member in range(N):
    partial_sum += a[member]
    if partial_sum > 0:
        if sum_total - partial_sum < 0:
            print (member+1)
            break
        else:
            continue
    elif ((member == N-1) and (partial_sum == sum_total)):
        print('Impossible')
    else:
        continue