#include <stdio.h>

int main(int argc, const char * argv[]) {
  int m, n, c;
  
  scanf("%d %d %d", &n, &m, &c);
  
  if (n % 2 == 1 && m % 2 == 1)
    printf("NO\n");
  else if ((n == 1 && m == 2) || (m == 2 && n == 1))
    printf("YES\n");
  else if (n == 1 || m == 1)
    printf("NO\n");
  else
    printf("YES\n");

  return 0;
}