#include <bits/stdc++.h>
using namespace std;
int main() {
  int A;
  int B;
  int C;
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> A;
  cin >> B;
  cin >> C;
  if (A + B > C)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
