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