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