LogsAggregator.java

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;


public class LogsAggregator 
{
	public static void main(String[] args) 
	{
		Scanner scan = new Scanner(System.in);
		int linesNum = Integer.parseInt(scan.nextLine());
		ArrayList<String> input = new ArrayList<String>();
		String[] line = new String[3];
		
		for (int i = 0; i < linesNum; i++) 
		{
			line = scan.nextLine().split(" ");
			input.add(line[0]);
			input.add(line[1]);
			input.add(line[2]);
		}
;
		ArrayList<String> names = new ArrayList<String>();
		ArrayList<Integer> times = new ArrayList<Integer>();
		ArrayList<String> ips = new ArrayList<String>();
		
		for (int i = 0; i < input.size(); i+=3) 
		{
			names.add(input.get(i+1));
		}
		names = removeDuplicatesAndSort(names);  //sort names and remove duplicates
		int currentTime = 0;
		for (int i = 0; i < names.size(); i++) 
		{
			for (int j = 0; j < input.size(); j+=3) 
			{
				if (names.get(i).equals(input.get(j+1))) 
				{
					currentTime += Integer.parseInt(input.get(j+2));
				}
			}
			times.add(currentTime);
			currentTime = 0;
		}

		for (int i = 0; i < names.size(); i++) 
		{
			System.out.printf("%s: %d ",names.get(i), times.get(i));
			
			for (int j = 0; j < input.size(); j+=3) 
			{
				if (names.get(i).equals(input.get(j+1))) 
				{
					ips.add(input.get(j));
				}
			}
			removeDuplicatesAndSort(ips);
			System.out.println(ips);
			ips.clear();
		}		
		
	}

	private static ArrayList<String> removeDuplicatesAndSort(ArrayList<String> names) 
	{
		for (int i = 0; i < names.size(); i++) 
		{
			for (int j = i+1; j < names.size(); j++) 
			{
				if (names.get(i).equals(names.get(j))) 
				{
					names.remove(j);
					j--;
				}
			}
		}
		Collections.sort(names);
		return names;
	}

}