#include <bits/stdc++.h>
using namespace std;
const int N = 200005;
const int K = (int)log2(N) + 2;
const long long infi = 1ll << 60;
int main() {
  ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  ;
  long long a, b, c;
  cin >> a >> b >> c;
  if (a + b <= c)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
