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

int main() {
    ll n, s;
    cin >> n >> s;

    if (n == 1) {
        cout << ((25 <= s && s < 30) ? "Yes" : "No") << endl;
    } else {
        cout << ((25 <= s && s <= 29 * n) ? "Yes" : "No") << endl;
    }

    return 0;
}