Input Format

Input from stdin is handled by the locked stub code in the Solution class.

The first line contains an integer, , denoting the number of players.
Each of the  subsequent lines contains a player's  and , respectively.

Constraints

•  players can have the same name.
• Player names consist of lowercase English letters.

Output Format

You are not responsible for printing any output to stdout. The locked stub code in Solution will create a Checker object, use it to sort the Player array, and print each sorted element.

# Java Comparator problem solution | HackerRank

import java.util.*;

class Checker implements Comparator<Player>{

public int compare(Player a, Player b) {
// If 2 Players have the same score
if(a.score == b.score){
// Order alphabetically by name
if(a.name.compareTo(b.name) < 0){
return -1;
}
else if(a.name.compareTo(b.name) > 0){
return 1;
}
return 0;
}

// Otherwise, order higher score first
else if(a.score > b.score){
return -1;
}
else if(a.score < b.score){
return 1;
}

return 0;
}
}

/** Alternative Approach:

class Checker implements Comparator<Player>{

public int compare(Player a, Player b) {
// If 2 Players have the same score
if(a.score == b.score){
// Order alphabetically by name
return a.name.compareTo(b.name);
}

// Otherwise, order higher score first
return ((Integer) b.score).compareTo(a.score);
}
}

**/

class Player{
String name;
int score;

Player(String name, int score){
this.name = name;
this.score = score;
}
}

class Solution {

public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();

Player[] player = new Player[n];
Checker checker = new Checker();

for(int i = 0; i < n; i++){
player[i] = new Player(scan.next(), scan.nextInt());
}
scan.close();

Arrays.sort(player, checker);
for(int i = 0; i < player.length; i++){
System.out.printf("%s %s\n", player[i].name, player[i].score);
}
}
}