BOJ/백준 - 11651 좌표 정렬하기 2 JAVA

좌표 정렬하기 문제에서 정렬 순서만 바꿔주면 된다.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;
 
public class Main {
 
    public static void main(String[] args) throws IOException {
 
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();
 
        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());
        }
 
        Arrays.sort(arr, (o1,o2)->{
            if(o1[1]==o2[1]) return o1[0]-o2[0];
            else return o1[1]-o2[1];
        });
 
        for(int i=0;i<N;i++){
            sb.append(arr[i][0]+" "+arr[i][1]).append('\n');
        }
 
        System.out.println(sb);
    }
}