#include <bits/stdc++.h>
int main() {
  using namespace std;
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int mod = 1e9 + 7;
  int cas = 1;
  while (cas--) {
    int64_t a, b, c;
    int64_t sum = a + b;
    if (sum >= c) {
      cout << "Yes\n";
    } else
      cout << "No\n";
  }
  return 0;
}
