#include <bits/stdc++.h>
using namespace std;
void OJ();
void solve() {
  int a, b, c;
  cin >> a >> b >> c;
  cout << (a + b >= c ? "Yes" : "No");
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  OJ();
  int t = 1;
  while (t--) {
    solve();
  }
  return 0;
}
void OJ() {}
