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