#include <bits/stdc++.h>
using namespace std;
vector<pair<long long, int>> factorize(long long n) {
  vector<pair<long long, int>> res;
  for (long long i = 2; i * i <= n; i++) {
    if (n % i) continue;
    res.emplace_back(i, 0);
    while (n % i == 0) {
      n /= i;
      res.back().second++;
    }
  }
  if (n != 1) res.emplace_back(n, 1);
  return res;
}
int main() {
  int A, B, C;
  cin >> A >> B >> C;
  if (C >= A + B)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
