#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include <iomanip>
using namespace std;


int main(){
    int i, j, k;
    cin >> i >> j >> k;
    if (i <= j && i <= k) cout << "Yes" << endl;
    else cout << "No" << endl;
}