#include <bits/stdc++.h>
using namespace std;
int main(void) {
  int a, b, c;
  cin >> a >> b >> c;
  if (c < a)
    cout << "Yes" << endl;
  else if (c < (a + b))
    cout << "Yes" << endl;
  else if (c < (a + b + b))
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
