Weightlifting

package com.company;

import java.util.*;
import java.util.LinkedHashMap;

/**
 * Created by Valeri on 8.3.2016 г..
 */
public class Weightlifting {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = Integer.parseInt(scan.nextLine());

        TreeMap<String, TreeMap<String, Integer>> players = new TreeMap<>();

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

            String[] split = scan.nextLine().split("\\s+");

            String name = split[0];
            String exersice = split[1];
            int kg = Integer.parseInt(split[2]);

            if (!players.containsKey(name)) {
                players.put(name, new TreeMap<>());
            }

            if ((players.get(name).containsKey(exersice))) {
                players.get(name).put(
                        exersice, players.get(name).get(exersice) + kg);
            } else {
                players.get(name).put(exersice, kg);
            }
        }

            for (String player : players.keySet()) {

                System.out.print(player + " : ");

                ArrayList<String> exercises = new ArrayList<>();

                for (String exercise : players.get(player).keySet()) {
                    exercises.add(String.format("%s - %d kg" , exercise,
                                                                players.get(player).get(exercise)));
                }
                System.out.println(exercises.toString().substring(1, exercises.toString().length() - 1));
            }

        }


    }