17. Logs Aggregator

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

public class LogsAggregator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());
        Map<String, TreeMap<String, Integer>> logs = new TreeMap<>();

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

            if (!logs.containsKey(user)) {
                logs.put(user, new TreeMap<>());
                logs.get(user).put(ip, duration);
            } else {
                if (!logs.get(user).containsKey(ip)) {
                    logs.get(user).put(ip, duration);
                } else {
                    int currentDuration = logs.get(user).get(ip);
                    logs.get(user).put(ip, currentDuration + duration);
                }
            }
        }

        for (Map.Entry<String, TreeMap<String, Integer>> user : logs.entrySet()) {
            int totalDuration = 0;

            for (Integer s : user.getValue().values()) {
                totalDuration += s;
            }

            System.out.println(user.getKey() + ": " + totalDuration + " " + user.getValue().keySet());
        }
    }
}