08. Ranking / C# Advanced / Dictionary

using System;
using System.Collections.Generic;
using System.Linq;

namespace _08._Ranking
{
    class Program
    {
        static void Main(string[] args)
        {
            // Reading input from the console //
            string inputInformation = Console.ReadLine();

            // Creating some structures of information //
            Dictionary<string, string> allContests = new Dictionary<string, string>();
            Dictionary<string, Dictionary<string, int>> usersWithContests =
                new Dictionary<string, Dictionary<string, int>>();

            // Fill in first Dictionary//
            while (inputInformation?.ToLower() != "end of contests")
            {
                string[] inputArr = inputInformation.Split(":", StringSplitOptions.RemoveEmptyEntries);
                string contest = inputArr[0];
                string passwordForContest = inputArr[1];

                if (allContests.ContainsKey(contest) == false)
                {
                    allContests.Add(contest,passwordForContest);
                }

                inputInformation = Console.ReadLine();
            }
            // Reading information for users and their contests //
            string usernameAndPassword = Console.ReadLine();

            // Fill in second Dictionary //
            while (usernameAndPassword?.ToLower() != "end of submissions")
            {
                string[] usernameAndPasswordArr =
                    usernameAndPassword.Split("=>", StringSplitOptions.RemoveEmptyEntries);
                string contest = usernameAndPasswordArr[0];
                string password = usernameAndPasswordArr[1];
                string username = usernameAndPasswordArr[2];
                int points = int.Parse(usernameAndPasswordArr[3]);

                // LOGIC (Happy Path statement) //
                if (allContests.ContainsKey(contest) && allContests[contest].Contains(password))
                {
                    if (usersWithContests.ContainsKey(username) && usersWithContests[username].ContainsKey(contest))
                    {
                        // Check if the new points of current contest are bigger than older and if they are -> set them for new points//
                        if (usersWithContests[username][contest] < points )
                        {
                            usersWithContests[username][contest] = points;
                        }
                    }
                    else
                    {
                        if (usersWithContests.ContainsKey(username) == false)
                        {
                            usersWithContests.Add(username, new Dictionary<string, int>());
                            usersWithContests[username].Add(contest, points);
                        }
                        else
                        {
                            usersWithContests[username].Add(contest, points);
                        }
                    }
                }
                usernameAndPassword = Console.ReadLine();
            }

            string personWithBestScore = "";
            int bestSum = int.MinValue;

            //Finding the person's name and his/her best score//
            foreach (var user in usersWithContests)
            {
                int maxSum = 0;
                foreach (var userValues in user.Value.Values)
                {
                    int currentPersonSum = userValues;
                    maxSum += currentPersonSum;

                    if (maxSum > bestSum)
                    {
                        bestSum = maxSum;
                        personWithBestScore = user.Key;
                    }
                }
            }
            // PRINTING WITH FOREEACH //
            Console.WriteLine($"Best candidate is {personWithBestScore} with total {bestSum} points.");
            Console.WriteLine("Ranking: ");
            foreach (var users in usersWithContests.OrderBy(x => x.Key))
            {
                Console.WriteLine($"{users.Key}");
                foreach (var values in users.Value.OrderByDescending(c => c.Value))
                {
                    Console.WriteLine($"#  {values.Key} -> {values.Value}");
                }
            }
        }
    }
}