#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

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