/* -*- coding: utf-8 -*-
 *
 * 1979.cc:  No.1979 [Cherry 4th Tune A] I min ! - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int i, j, k;
  scanf("%d%d%d", &i, &j, &k);

  if (i <= j && i <= k) puts("Yes");
  else puts("No");
  return 0;
}