def round_half_up(n):
    return int(n + 0.5)

A, B = map(int, input().split())
s = 0
for i in range(200):
    for j in range(200):
        if i == 0 and j == 0:
            continue
        s = i + j
        if A == round_half_up(100*i / s) and B == round_half_up(100*j / s):
            break
    else:
        continue
    break
print(s)