Main2.java

package bak11651;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Main2 {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int N = Integer.parseInt(br.readLine());

        int[][] arr = new int[N][2];

        StringTokenizer st;
        for(int i = 0; i< N; i++){
            st = new StringTokenizer(br.readLine());
            arr[i][0] = Integer.parseInt(st.nextToken());
            arr[i][1] = Integer.parseInt(st.nextToken());
        }

        arr = Main2.sort(arr);

        StringBuilder sb = new StringBuilder();
        for(int i=0; i < N; i++){
            sb.append(arr[i][0] + " " + arr[i][1]).append('\n');
        }
        System.out.println(sb);
    }

    public static int[][] sort(int[][] arr) {
        Arrays.sort(arr, (e1, e2) -> {
            if(e1[1] == e2[1]){
                return e1[0] - e2[0];
            } else {
                return e1[1] - e2[1];
            }
        });
        return arr;
    } 
}