#include <bits/stdc++.h>
const long long MXN = 1e8 + 7;
using namespace std;
int n, m, a;
int main() {
  ios_base::sync_with_stdio(0);
  ;
  cin >> n >> m >> a;
  if (n <= m && n <= a) {
    cout << "Yes";
  } else {
    cout << "No";
  }
}
