import java.util.Scanner;

public class Lab10Lopez {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		boolean run = false;

		while (!run) {
			int input = 0;
			int answer1 = 0;
			int answer2 = 0;
			int increment = 0;
			boolean process = false;
			while (!process) {
				System.out.print("Please enter a number (q to quit): ");
				if (scan.hasNextInt()) {
					input = scan.nextInt();
					scan.nextLine();
					if (input < 0) {
						System.out.println("You have entered an invalid option, please enter a valid number...\n");
					} else {
						process = true;
					}
				} else {
					String whatsEntered = scan.nextLine();
					if (whatsEntered.equalsIgnoreCase("q")) {
						System.out.println("+-------------------------------+");
						System.out.println("| Thanks for useing my program! |");
						System.out.println("+-------------------------------+");
						System.exit(1);
					} else {
						System.out.println("You have entered an invalid option, please enter a valid number...\n");
					}
				}
			}

			for (int x = input; x > 0; x--) {
				increment++;
				answer1 += increment;
			}

			// ReInitializing the variable to 0
			increment = 0;

			while (input > 0) {
				increment++;
				answer2 += increment;
				input--;

			}

			System.out.println("For       While");
			System.out.printf("%-10d%-10d\n", answer1, answer2);
		}
	}
}