[java] 10814. 나이순 정렬

import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int N = Integer.parseInt(br.readLine());

        String[][] data = new String[N][2];

        for (int i=0 ; i<N ; i++) {
            String input = br.readLine();
            String[] parts = input.split(" ");

            data[i][0] = parts[0];  //int 저장
            data[i][1] = parts[1];  //String 저장
        }
        Arrays.sort(data, Comparator.comparingInt(arr -> Integer.parseInt(arr[0])));

        for (int i=0 ; i<N ; i++) {
            System.out.println(data[i][0] + " " + data[i][1]);
        }
        br.close();
    }
}