Нерешенная задача

package com.company;
import java.util.*;
public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int a, i, j, b;
        int[] x;
        int[] y;
        a = in.nextInt();
        x = new int[a];
        y = new int[a];
        for (i = 0; i < a; i++) {
            x[i] = in.nextInt();
            y[i] = in.nextInt();
        }
        for (i = 0; i < a - 1; i++)
            for (j = i + 1; j < a; j++)
                if (y[i] < y[j]) {
                    b = y[i];
                    y[i] = y[j];
                    y[j] = b;
                    b = x[i];
                    x[i] = x[j];
                    x[j] = b;
                }
        for (i = 0; i < a; i++)
            System.out.println(x[i] + " " + y[i]);
        if (y[i] == y[i]) {
            for (i = 0; i < a; i++) {

            }
            for (i = 0; i < a; i++)
                System.out.println(x[i] + " " + y[i]);
        } else {
            for (i = 0; i < a; i++)
                System.out.println(x[i] + " " + y[i]);
        }
    }
}