#!/usr/bin/env python
#coding:utf8

def read():
    return map(int, raw_input().split())


def work((A, B)):
    total = 1
    while 1:
        for a in range(total + 1):
            b = total - a
            if int ((100.0 * a) / (a + b) + 0.5) == A and \
               int ((100.0 * b) / (a + b) + 0.5) == B:
               print total
               return
        total += 1
    

if __name__ == "__main__":
    work(read())