#define rep(i, n) for(int i=0;i<(int)(n);i++)
#define ALL(v) v.begin(), v.end()
typedef long long ll;

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

int main(){
  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  
  ll n,s;
  cin>>n>>s;
  
  if(s<25) cout<<"No"<<endl;
  else if((s+n-1)/n>=30) cout<<"No"<<endl;
  else cout<<"Yes"<<endl;
  
  
  
  return 0;
}