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

int N, S;

int main() {
  cin >> N >> S;
  int A = S / N;
  int R = S - A * N;
  if (25 <= A && A < 30) {
    if (A == 29 && R > 0) cout << "No" << endl;
    else cout << "Yes" << endl;
  } else if (A >= 30) cout << "No" << endl;
  else {
    if (S - 25 > 0) cout << "Yes" << endl;
    else cout << "No" << endl;
  }
  return 0;
}