import java.util.*;

public class Exercise138{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();
    int m = sc.nextInt();
    int c = sc.nextInt();

    if(n == 1 && m > 2){
      System.out.println("NO");
    }else if(m == 1 && n > 2){
      System.out.println("NO");
    }else if(n % 2 == 1 && m % 2 == 1){
      System.out.println("NO");
    }else{
      System.out.println("YES");
    }
  }
}