#include<bits/stdc++.h>
#include <atcoder/all>
#ifdef LOCAL
#include <debug_print.hpp>
#define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (static_cast<void>(0))
#endif
using namespace atcoder;
using mint=modint998244353;
using namespace std;
using ll=long long;
using ul=unsigned long long;
int dx[8] = {-1, 1, 0, 0, -1, -1, 1, 1};
int dy[8] = {0, 0, -1, 1, -1, 1, -1, 1};
using Graph=vector<vector<int>>;
int main(){
    int N,S;
    cin>>N>>S;
    if(N==1){
        if(25<=S&&S<=30)cout<<"Yes"<<endl;
        else cout<<"No"<<endl;
        return 0;
    }
    S-=29;
    N--;
    cout<<(25<=S/N&&S/N<30?"Yes":"No")<<endl;
}