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

round = lambda x: (x * 2 + 1) // 2

flag = 0
for a in range(200):
    for b in range(200):
        if a == 0 and b == 0:
            continue
        if round(100 * a / (a + b)) == A and round(100 * b / (a + b)) == B:
            print(a + b)
            flag = 1
            break
    if flag == 1:
        break