#include <stdio.h>
int main(){
  int N,M,C;
  scanf("%d %d %d",&N,&M,&C);
  if((N==1 && M==2)||(N==2 && M==1))printf("YES\n");
  else if(N!=1 && M!=1 && (N%2==0 || M%2==0))printf("YES\n");
  else printf("NO\n");
  return 0;
}