PointSort.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;

import sun.tools.jstat.SymbolResolutionClosure;

public class PointSort{
  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];
    for(int i=0;i<N;i++){
      StringTokenizer st = new StringTokenizer(br.readLine(), " ");
      arr[i][0] = Integer.parseInt(st.nextToken());	// 나이
      arr[i][1] = Integer.parseInt(st.nextToken());	// 이름
    }

    Arrays.sort(arr, new Comparator<int[]>() {

      @Override
      public int compare(int[] o1, int[] o2) {
        if(o1[0] == o2[0]){
          return o1[1] - o2[1];}
        else{
          return o1[0] - o2[0];}
      }
    });

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