#include <bits/stdc++.h>
using namespace std;
template <class T>
bool contain(const std::string &s, const T &v) {
  return s.find(v) != std::string::npos;
}
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  cout << (a + b > c ? "Yes" : "No") << endl;
}
