#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int A,B,C;
  cin>>A>>B>>C;
  if(A <= B && A <= C) cout<<"Yes"<<endl;
  else cout<<"No"<<endl;
}