here is my code

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

public class Problem1100 {

    public static class Busket extends LinkedList<Long>{}

    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        int times = in.nextInt();
        Busket[] list = new Busket[100];
        long id =0;
        int score =0;
        for(int i =0;i<times;i++){
            id = in.nextLong();
            score = in.nextInt();
            boolean insert=false;
            if(list[score]==null){
                Busket busket =  new Busket();
                busket.add(id);
                list[score]=busket;
            } else{
                list[score].add(id);
            }
        }

        StringBuffer result = new StringBuffer();

        for(int i = list.length-1;i>=0; i--){
            Busket busket =list[i];
            if(busket!=null)
            for(Long mId: busket) {
                result.append(mId);
                result.append(" ");
                result.append(i);
                result.append("\n");
            }
        }
        out.println(result.toString());
        out.flush();
    }
}

Edited by author 24.05.2016 13:57

Edited by author 24.05.2016 14:01

Edited by author 24.05.2016 14:09

Edited by author 24.05.2016 14:11

new Busket[100] means indices 0..99. Use [101] for 0..100 indices.

Edited by author 24.05.2016 14:33