#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll mod = 1000000007;
const ll INF = 100000000000000000LL;
signed main() {
  int a, b, c, d;
  cin >> a >> b >> c;
  if (a + b <= c)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
