package backjoon;

// https://www.acmicpc.net/problem/10814

// 나이순정렬

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 _10814 {

public static void main(String[] args) throws IOException {

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

// memory 62992 runtime 2084

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

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

for(int i=0; i<N; i++) {

StringTokenizer st = new StringTokenizer(br.readLine(), " ");

arr[i][0] = st.nextToken();

arr[i][1] = st.nextToken();

}

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

@Override

public int compare(String[] o1, String[] o2) {

return Integer.parseInt(o1[0]) - Integer.parseInt(o2[0]); //나이만 비교

}

});

for(int i=0; i<N; i++){

System.out.println(arr[i][0] + " " + arr[i][1]);

}

}

}

/*

INPUT

3

21 Junkyu

21 Dohyun

20 Sunyoung

OUTPUT

20 Sunyoung

21 Junkyu

21 Dohyun

*/