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