def solve(A, B):
    for total in range(1, 1000):
        for a in range(0, total + 1):
            b = total - a
            AA = int(100*a/total+0.5)
            BB = int(100*b/total+0.5)
            if AA == A and BB == B:
                return total
    raise RuntimeError('something is wrong')



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