#include <bits/stdc++.h>
using namespace std;
const double pi = acos(-1);
const double eps = 1e-6;
int main() {
  ios::sync_with_stdio(false);
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b > c) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
  return 0;
}
