package com.dailyprogrammer;

import java.util.Scanner;
import static java.lang.System.out;


public class Easy17 {

    /**
     * @param args
     */
    public static void main(String[] args) {

        Scanner s = new Scanner(System.in);
        out.println("What height would you like the  triangle?");
        int height = s.nextInt();

        growingTriangle(height);
        shrinkingTriangle(height);


    }

    private static void growingTriangle(int h){
        for (int i=0; i<h; i++){
            for(int j=1; j<=Math.pow(2, i); j++){
                out.printf("@");
            }
            out.println();
        }
    }

    private static void shrinkingTriangle(int h){
        for (int i=h-1; i>=0; i--){
            for(int j=1; j<=Math.pow(2, i); j++){
                out.printf("@");
            }
            out.println();
        }
    }

}