Logs Aggregator

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

public class Veri {
    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        sc.nextLine();
        TreeMap<String,Map<String,Integer>> result = new TreeMap<String, Map<String,Integer>>();


        for (int i = 0; i <n ; i++) {
            String[] line = sc.nextLine().split(" ");
            String ip = line[0];
            String name = line[1];
            Integer duration = Integer.parseInt(line[2]);

            Map<String, Integer> durationAndIp= new TreeMap<String, Integer>();

            if(result.containsKey(name)){
                if(result.get(name).containsKey(ip)){
                    int prevDuration = result.get(name).get(ip);
                    duration += prevDuration;
                }
                result.get(name).put(ip, duration);
            }else{
                durationAndIp.put(ip, duration);
                result.put(name,durationAndIp);
            }
        }
        System.out.println(result);
    }
}