#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000


int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	int A, B; cin >> A >> B;
	int ans = 3000;
	rep(i, 1001) {
		rep(j, 1001) {
			int a = (double)(100 * i) / (i + j) + 0.5;
			int b = (double)(100 * j) / (i + j) + 0.5;
			if (a == A && b == B) {
				ans = min(ans, i + j);
				break;
			}
		}
	}
	cout << ans << endl;

    return 0;
}