#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, m, k;
  cin >> n >> m >> k;
  if (n <= m && n <= k)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
