#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001



int main(){
	
	int I,J,K;
	cin>>I>>J>>K;
	
	if(I<=J&&I<=K)cout<<"Yes"<<endl;
	else cout<<"No"<<endl;
	
    return 0;
}