#include <bits/stdc++.h>
using namespace std;
double borgomool(double x) {
  int n = 64;
  double l = 0, r = x, m;
  while (n--) {
    m = (l + r) / 2;
    if (m * m < x) {
      l = m;
    } else {
      r = m;
    }
  }
  return m;
}
int main() {
  ios_base::sync_with_stdio(false);
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b <= c) {
    cout << "No"
         << "\n";
  } else
    cout << "Yes"
         << "\n";
  return 0;
}
