#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, m, k;
  cin >> n >> m >> k;
  long long x = min(m, k);
  if (x >= n)
    cout << "Yes"
         << "\n";
  else
    cout << "No"
         << "\n";
  return 0;
}
