11651(Sort).java

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

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