import java.math.*;
import java.util.*;

public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    int k = sc.nextInt();
    if(n * m == 2){
      System.out.println("YES");
      return;
    }
    if(n % 2 == 0 || m % 2 == 0){
       System.out.println("YES");
       return;
    }
    System.out.println("NO");
  }
}