Logs Aggregator

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _10
{
    class Program
    {
        static void Main(string[] args)
        {
            int times = int.Parse(Console.ReadLine());
            List<User> AllUsers = new List<User>();
            bool alreadyExistsUser = false;
            for (int i = 0; i < times; i++)
            {
                string[] input = Console.ReadLine().Split(' ');
                string inputIp = input[0];
                string inputName = input[1];
                int inputDuration = int.Parse(input[2]);
                foreach (var user in AllUsers)
                {
                    if (user.Name == inputName)
                    {
                        alreadyExistsUser = true;
                        user.duration += inputDuration;
                        if (!user.Ips.Contains(inputIp))
                        {
                            user.Ips.Add(inputIp);
                            break;
                        }
                        else
                        {
                            break;
                        }
                    }
                }
                if (!alreadyExistsUser)
                {
                    AllUsers.Add(new User(inputName, inputIp, inputDuration));
                }
            }
            AllUsers = AllUsers.OrderBy(a => a.Name).ToList();
            foreach (var user in AllUsers)
            {
                user.Ips.Sort();
                Console.Write($"{user.Name}: {user.duration} [");
                string outIp = "";
                foreach (var ip in user.Ips)
                {
                    outIp += $"{ip}, ";
                }
                outIp = outIp.Remove(outIp.Length - 2);
                outIp += "]";
                Console.WriteLine(outIp);
            }
        }
        class User
        {
            public string Name;
            public int duration = 0;
            public List<string> Ips = new List<string>();
            public User (string Name , string FirstIp , int FirstDuration)
            {
                this.Name = Name;
                Ips.Add(FirstIp);
                duration += FirstDuration;
            }
        }
    }
}