#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int A, B, C;
  cin >> A >> B >> C;
  if (A + B <= C)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
