#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
const int mod = 1e9 + 7;
const long double pi = 3.141592653589793238462643383279502884197;
const long double eps = 1e-7;
int main() {
  int A, B, C;
  cin >> A >> B >> C;
  if (A + B > C) {
    cout << "Yes";
  } else {
    cout << "No";
  }
  system("pause");
  return 0;
}
