#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
const int N = 303 + 5;
void solve() {
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b >= c)
    cout << "Yes" << endl;
  else
    cout << "NO" << endl;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t = 1;
  while (t--) {
    solve();
  }
  return 0;
}
