/* -*- coding: utf-8 -*-
 *
 * 3595.cc:  No.3595 A Queen - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* main */

int main() {
  int n, h, w;
  scanf("%d%d%d", &n, &h, &w);

  if (h == 1 || w == 1 || h == w)
    puts("Yes");
  else
    puts("No");
  
  return 0;
}