Number Table

import java.util.Scanner;

public class p14_NumTable {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

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

        int currentNum = 0;
        int step = 1;

        for (int row = 1; row <= n ; row++) {
            currentNum = row;
            step = 1;
            for (int col = 0; col < n ; col++) {

                System.out.printf("%d ", currentNum);

                if (currentNum >= n){
                    step = -1;
                }
                currentNum = currentNum + step;
            }
            System.out.println();
        }
    }
}