26.03

import java.util.Scanner;

public class Butterfly {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        int n=Integer.parseInt(scanner.nextLine());
        for (int i = 1; i <=n-2 ; i++) {
            if(i%2==1)
            {System.out.print(repeatStr("*",n-2));
            System.out.print("\\");
            System.out.print(" ");
            System.out.print("/");
            System.out.println(repeatStr("*",n-2));}
             if(i%2==0)
             {System.out.print(repeatStr("-",n-2));
            System.out.print("\\");
            System.out.print(" ");
            System.out.print("/");
            System.out.println(repeatStr("-",n-2));}
        }
        System.out.print(repeatStr(" ",n-2+1));
        System.out.print("@");
        System.out.println(repeatStr(" ",n-2+1));

        for (int i = 1; i <=n-2 ; i++) {
            if(i%2==1)
            {System.out.print(repeatStr("*",n-2));
                System.out.print("/");
                System.out.print(" ");
                System.out.print("\\");
                System.out.println(repeatStr("*",n-2));}
            if(i%2==0)
            {System.out.print(repeatStr("-",n-2));
                System.out.print("/");
                System.out.print(" ");
                System.out.print("\\");
                System.out.println(repeatStr("-",n-2));}

    }}
    static String repeatStr(String str, int count ){
        String text="";
        {
            for (int j = 0; j <count ; j++) {
                text=text+str;
            }

        }
        return text;}}