A, B = map(int, input().split())

answer = 10 ** 15

for a in range(0, 2001):
    for b in range(0, 2001):
        if a + b == 0:
            continue
        if A == int(100 * a / (a + b) + 0.5) and B == int(100 * b / (a + b) + 0.5):
            if a + b < answer:
                answer = a + b
print(answer)