#include<stdio.h>
#include<stdlib.h>
#include<math.h>

typedef long long int int64;

#define MAX(a,b) ((a)>(b)?(a):(b))
#define MIN(a,b) ((a)<(b)?(a):(b))
#define ABS(a) ((a)>(0)?(a):-(a))

void run(void){
  int n,m,c;
  scanf("%d%d%d",&n,&m,&c);
  if(n==1 || m==1){
    int x=MAX(n,m);
    printf("%s\n",x==2?"YES":"NO");
    return;
  }
  printf("%s\n",n%2==0 || m%2==0?"YES":"NO");
  return;
}

int main(void){
  run();
  return 0;
}