#include <cstdio>

 int main(){
  int a,b,c;
  scanf("%d%d%d",&a,&b,&c);
  if(a==1 || b==1)
    if(a*b!=2)
      a=b=1;

  printf((a*b)%2 ? "NO\n" : "YES\n");
  return 0;
}