Parallelepiped

package Exam;

import java.util.Scanner;

public class Demo {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());

        int row = 4*n+4;
        int col = 3*n+1;

        String firstLine = "+" + repeatString("~", n-2) + "+"
                + repeatString(".", n*2+1);
        System.out.println(firstLine);
        for (int i = 0; i < 2 * n + 1; i++) {
            String line = "|" + repeatString(".", i)
                    + "\\" + repeatString("~", n-2) + "\\"
                    + repeatString(".", (n*2)-i);
            System.out.println(line);
        }
        for (int i = 0; i < 2 * n + 1; i++) {
            String line = repeatString(".", i)
                    + "\\" + repeatString(".", (2*n)-i)
                    + "|" + repeatString("~", n-2) + "|";
            System.out.println(line);
        }
        String secondLine = repeatString(".", n*2+1)
                + "+" + repeatString("~", n-2) + "+";
        System.out.println(secondLine);
    }
    static String repeatString(String toRepeat, int count) {
        StringBuilder text = new StringBuilder();

        for (int i = 1; i <=count; i++) {
            text.append(toRepeat);
        }
        return text.toString();
    }
}