/*
 * Class:      CSC190
 * Project:    hw7
 * Date:       2013, Oct 16
 * Author:     Austin Holbrook <[email protected]>
 * Purpose:    This program takes an input (n) between 1 and 13 and prints out 3
 *             triangles of size n
 */

import java.util.Scanner;


class Triangle {
    int lines;

    public void setLines(int lines) {
        this.lines = lines;
    }

    int getTriangularNumber(int n) {
        return (n * (n+1)) / 2;
    }

    void plotLeftAlignedHorizontal() {
        for (int i = 1; i <= lines; i++) {
            for (int j = getTriangularNumber(i)-i+1; j <= getTriangularNumber(i); j++) {
                System.out.printf("%-3d", j); //the dash left aligns the values
            }
            System.out.println();
        }
        System.out.println();
    }

    void plotLeftAlignedVertical() {
        int lastNum = 0;
        for (int i = 1; i <= lines; i++) {
            for (int j = lines; j > lines-i; j--) {
                if (j == lines) {
                    lastNum = i;
                    System.out.printf("%-3d", lastNum);
                }
                else {
                    lastNum += j;
                    System.out.printf("%-3d", lastNum);
                }
            }
            System.out.println();
        }
        System.out.println();
    }

    void plotRightAlignedDiag() {
        int lastNum = 0;
        int times = 0;
        for (int i = lines; i >= 1; i--) {
            times++;
            //Print the leading space
            for (int j = 1; j <= lines-times; j++) {
                System.out.print("   ");
            }

            for (int j = lines; j > lines-times; j--) {
                if (j == lines) {
                    lastNum = i;
                    System.out.printf("%3d", lastNum);
                }
                else {
                    lastNum += j+1;
                    System.out.printf("%3d", lastNum);
                }
            }
            System.out.println();
        }
    }

}

public class Runner {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Triangle myTriangle = new Triangle();

        int lines; //Lines the triangle has

        //Validate input for lines
        while (true) {
            System.out.print("Enter lines (1 - 13): ");
            lines = sc.nextInt();

            if (lines >= 1 && lines <= 13) {
                myTriangle.setLines(lines);
                break;
            }

            System.out.println("You must enter a value between 1 and 13!");
        }

        myTriangle.plotLeftAlignedHorizontal();
        myTriangle.plotLeftAlignedVertical();
        myTriangle.plotRightAlignedDiag();
    }
}