A, B = map(int, input().split())
if A * B == 0:
    print(1)
    exit()
eps = 10 ** -5
ans = 1000
for a in range(1, 300):
    for b in range(1, 300):
        ab = a + b
        if round(100 * a / ab + eps) == A and round(100 * b / ab + eps) == B:
            ans = min(ans, ab)
print(ans)