#include <bits/stdc++.h>
using namespace std;

int main(){
    int a, b;
    cin >> a >> b;
    int ans = 10000000;
	for(int j = 1; j < 101; j++){
		if(a == round(100.0 * 1 / (1 + j)) and b == round(100.0 * j / (1 + j))){
			ans = min(ans, 1 + j);
		}
	}
	cout << ans << endl;
    return 0;
}