#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, x;
  cin >> a;
  cin >> b;
  cin >> c;
  x = (a + b);
  if (x > c) {
    cout << "Yes";
  } else {
    cout << "No";
  }
  return 0;
}
