#include <iostream>

using std::cin;
using std::cout;
using std::cerr;
using std::endl;

int main() {
  int a, b, c;

  cin >> a >> b >> c;

  if (a + b >= c) {
    cout << "Yes" << endl;
  else {
    cout << "No" << endl;
  }

  return 0;
}
