#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1e9 + 7;
const double PI = 2 * acos(0.0);
const long double EPS = 1.0E-14;
int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  if (a + b <= c)
    cout << "Yes";
  else
    cout << "No";
  return 0;
}
