LogsAggregator

package com.company;

import java.util.Scanner;
import java.util.TreeMap;

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

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

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

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

            String Ip = input[0];
            String name = input[1];
            int duration = Integer.parseInt(input[2]);


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

            if ((aggregator.get(name). containsKey(Ip))) {
                aggregator.get(name).put(Ip, aggregator.get(name).get(Ip) + duration);
            }

            else {
                aggregator.get(name).put(Ip, duration);
            }



        }

        for (String names: aggregator.keySet()) {
            System.out.print(names + ": ");
            int duration = 0;

            for (String durations: aggregator.get(names).keySet()) {
                duration += aggregator.get(names).get(durations);
            }

            System.out.print(duration + " ");
            System.out.println(aggregator.get(names).keySet());
        }
    }
}