public class ColumnSort {

    public static void main (String[] argv)
    {
        // Some test data:
        int[][] A = {
            {1, 0, 1},
            {1, 1, 1},
            {1, 0, 0},
            {0, 0, 0}
        };

        // Before:
        print (A);

        columnSort (A);

        // After:
        print (A);
    }


    // INSERT YOUR CODE HERE


    static void print (int[][] X)
    {
        System.out.println ("\nArray:");
        for (int i=0; i<X.length; i++) {
            for (int j=0; j<X[i].length; j++) {
                System.out.print (" " + X[i][j]);
            }
            System.out.println ();
        }
    }

}