#include <bits/stdc++.h>
using namespace std;
int main() {
  uint input_a, input_b, input_c;
  cin >> input_a >> input_b >> input_c;
  if (input_a + input_b > input_c) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}
