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