//#include<bits/stdc++.h>
#include"bits/stdc++.h"
using namespace std;
#ifdef LOCAL_DEBUG
  #include "LOCAL_DEBUG.hpp"
#endif
#define int long long

signed main(){

  int a,b,c; cin >> a >> b >> c;
  if(a-b < c) cout << "YES" << endl;
  else cout << "NO" << endl;

  return 0;
}