# amir mirou


l = [1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1]


n = l[::-1]

i = 0

while i < len(l):
    if n[i] == 0:
        pos = abs(int(i - len(l)) + 1)
        print('last zero index is {}'.format(pos))
        l[pos] = 1
        break
    i += 1

print(l)