from itertools import count

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

for i in count(1):
    for a in range(i+1):
        b = i - a
        x = int(100 * a / (a + b) + 0.5)
        y = int(100 * b / (a + b) + 0.5)
        if x == A and y == B:
            print(i)
            exit()