#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, k;
  cin >> a;
  cin >> b;
  cin >> k;
  if ((a <= b) && (a <= k)) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}
