/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2022.01.07 21:35:30
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;


int main() {
    ll n,s;cin >> n >> s;
    if (n == 1) {
        if (s >= 25 && s < 30) puts("Yes");
        else puts("No");
        return 0;
    }
    n--;
    for (int i = 25; i < 30; i++) {
        if (0<=s-i && s-i<=n*29) {
            puts("Yes");
            return 0;
        }
    }
    puts("No");
    return 0;
}