Dictionaries - 01. Ranking - C# Fundamentals

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;

namespace AssociativeArrays__Dictionary_____MoreExercise
{
    class Ranking
    {
        static void Main()
        {
            Dictionary<string, string> contestsAndPasswords = new Dictionary<string, string>();

            Dictionary<string, Dictionary<string, int>> interns = new Dictionary<string, Dictionary<string, int>>();

            string commandOne = Console.ReadLine();
            while (commandOne != "end of contests")
            {
                string[] currentCommand = commandOne.Split(':');
                string contest = currentCommand[0];
                string password = currentCommand[1];

                if (!contestsAndPasswords.ContainsKey(contest))
                {
                    contestsAndPasswords[contest] = password;
                }

                commandOne = Console.ReadLine();
            }

            string commandTwo = Console.ReadLine();
            while (commandTwo != "end of submissions")
            {
                string[] input = commandTwo.Split("=>");
                string contest = input[0];
                string password = input[1];
                string userName = input[2];
                int points = int.Parse(input[3]);

                bool currentContest = contestsAndPasswords.ContainsKey(contest);
                bool currentPassword = contestsAndPasswords.ContainsValue(password);

                if (currentContest && currentPassword)
                {
                    if (!interns.ContainsKey(userName))
                    {
                        interns[userName] = new Dictionary<string, int>();

                    }

                    if (!interns[userName].ContainsKey(contest))
                    {
                        interns[userName].Add(contest, points);
                    }
                    else
                    {
                        if (interns[userName].ContainsKey(contest) && interns[userName][contest] < points)
                        {
                            interns[userName][contest] = points;

                        }
                    }

                }

                commandTwo = Console.ReadLine();
            }

            string bestName = string.Empty;
            int bestSum = 0;

            foreach (var candidate in interns)
            {
                string currentNameCandidate = candidate.Key;
                Dictionary<string, int> currentBestPoints = interns[currentNameCandidate];

                int sum = 0;
                string name = string.Empty;
                foreach (var kvp in currentBestPoints)
                {
                    string nameContest = kvp.Key;
                    int points = kvp.Value;

                    sum += points;
                    name = nameContest;
                }
                if (sum > bestSum)
                {
                    bestName = currentNameCandidate;
                    bestSum = sum;
                }
            }

            Console.WriteLine($"Best candidate is {bestName} with total {bestSum} points.");
            Console.WriteLine("Ranking: ");

            interns = interns
                      .OrderBy(x => x.Key)
                      .ToDictionary(x => x.Key, x => x.Value);

            foreach (var kvp in interns)
            {
                string name = kvp.Key;
                Dictionary<string, int> contestAndPoints = interns[name];


                contestAndPoints = contestAndPoints
                                .OrderByDescending(x => x.Value)
                                .ToDictionary(x => x.Key, x => x.Value);

                Console.WriteLine($"{name}");
                foreach (var kvp2 in contestAndPoints)
                {
                    string contest = kvp2.Key;
                    int points = kvp2.Value;

                    Console.WriteLine($"#  {contest} -> {points}");
                }
            }
        }
    }
}