CASTLE

import java.util.Scanner;
class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.print("Enter a number in the interval 3-1000: ");
    int n = Integer.parseInt(sc.nextLine());

    if(n>=3 && n<=1000){
        //top part of the castle
        int formNum = n/2;
        int underLineNum = (2*n)-(2*formNum+4);
        String form = generateFrom("^",formNum);
        String underLine = generateFrom("_",((2*n)-(2*formNum+4)));
        System.out.print("/");
        System.out.print(form);
        System.out.print("\\");
        if(n>4){
            System.out.print(underLine);
        }
        System.out.print("/");
        System.out.print(form);
        System.out.print("\\");
        System.out.println();
        //central part of the castle
        String space = generateFrom(" ",(n*2)-2);
        String specialSpace = generateFrom(" ",formNum+1);
        for(int i = 0;i<n-3;i++){
            System.out.print("|");
            System.out.print(space);
            System.out.print("|");
            System.out.println();

        }
        if(n>4){
             System.out.print("|");
             System.out.print(specialSpace);
             System.out.print(underLine);
             System.out.print(specialSpace);
             System.out.print("|");
             System.out.println();
            }
        else{
             System.out.print("|");
             System.out.print(space);
             System.out.print("|");
             System.out.println();
            }
        //bottom part of the castle

        String space2 = "";
        if(n>4){
         space2 = generateFrom(" ",underLineNum);
        }
        underLine = generateFrom("_",formNum);
        System.out.print("\\");
        System.out.print(underLine);
        System.out.print("/");
        System.out.print(space2);
        System.out.print("\\");
        System.out.print(underLine);
        System.out.print("/");
    }

  }


  public static String generateFrom(String symbol, int numberOfStars){
    StringBuffer builder = new StringBuffer();
    for(int i = 0;i< numberOfStars;i++){
      builder.append(symbol);
    }
    return builder.toString();
  }
}