题解 | #牛妹数#

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        String s = (n % 2 == 0 && n > 50) ? "yes" : "no";
        System.out.println(s);
    }
}