02_Judge

namespace P02._Judge
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    class StartUp
    {
        public static void Main()
        {
            using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, Dictionary<string, int>> userCoursePoints = new Dictionary<string, Dictionary<string, int>>();
            Dictionary<string, Dictionary<string, int>> courseUserPoints = new Dictionary<string, Dictionary<string, int>>();
            string command = Console.ReadLine();
            while (command != "no more time")
            {
                string[] input = command.Split(" -> ").ToArray();
                string course = input[1];
                string user = input[0];
                int points = int.Parse(input[2]);

                //check if such contest already exists
                if (!courseUserPoints.ContainsKey(course))
                {
                    courseUserPoints.Add(course, new Dictionary<string, int>());
                }
                //if user not exist
                if (!courseUserPoints[course].ContainsKey(user))
                {
                    courseUserPoints[course][user] = 0;
                }
                // if he is taking the higher score
                if (courseUserPoints[course][user] < points)
                {
                    courseUserPoints[course][user] = points;
                }

                //Add course to user
                if (!userCoursePoints.ContainsKey(user))
                {
                    userCoursePoints.Add(user, new Dictionary<string, int>());
                }
                //if course not exist
                if (!userCoursePoints[user].ContainsKey(course))
                {
                    userCoursePoints[user][course] = 0;
                }
                // if he is taking the higher score
                if (userCoursePoints[user][course] < points)
                {
                    userCoursePoints[user][course] = points;
                }

                command = Console.ReadLine();
            }

            List<string> result = new List<string>();
            foreach (var kvp in courseUserPoints)
            {
                result.Add($"{kvp.Key}: {kvp.Value.Count()} participants");
                int counter = 0;

                var sortedCourses = kvp.Value.OrderByDescending(x => x.Value).ThenBy(u=>u.Key);
                foreach (var item in sortedCourses)
                {
                    counter++;
                    result.Add($"{counter}. {item.Key} <::> {item.Value}");
                }

            }
            result.Add("Individual standings:");
            int count = 0;

            var sortedUsers = userCoursePoints.OrderByDescending(x => x.Value.Values.Sum()).ThenBy(x => x.Key);
            foreach (var kvp in sortedUsers)
            {
                count++;
                result.Add($"{count}. {kvp.Key} -> {kvp.Value.Values.Sum()}");
            }
            //Join by new line - Environment.NewLine or "\n"
            Console.WriteLine(string.Join(Environment.NewLine, result));
        }
    }
}