#include <bits/stdc++.h>
using namespace std;
template <class T>
void chmin(T& a, T const& b) {
  if (b < a) a = b;
}
inline int toInt(string s) {
  int v;
  istringstream sin(s);
  sin >> v;
  return v;
}
using ll = long long;
const ll mod = LLONG_MAX;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b <= c) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}
