#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define fi first
#define se second
#define all(a) a.begin(),a.end()
int main(){
  int i,j,k;
  cin >> i >> j >> k;
  if(i<=j && i<=k) cout << "Yes\n";
  else cout << "No\n";
  return 0;
}