def func(x):
    return int((x * 10 + 5) // 10)


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

for total in range(1,101):
    for a in range(101):
        b = total - a
        if func(100*a/(a+b)) == A and func(100*b/(a+b)) == B:
            print(total)
            exit()