using System;

using System.Collections.Generic;

​

class RandomRoundRobin

{

    static Random random = new Random();

​

    static void Main()

    {

        int numTeams = 5; // Change this to the number of teams

        int numParticipants = numTeams * 2;

​

        GenerateRandomSchedule(numTeams, numParticipants);

    }

​

    static void GenerateRandomSchedule(int numTeams, int numParticipants)

    {

        if (numParticipants % 2 != 0)

        {

            Console.WriteLine("The number of participants must be even.");

            return;

        }

​

        List<int> participants = new List<int>();

        for (int i = 1; i <= numParticipants; i++)

        {

            participants.Add(i);

        }

​

        int rounds = numParticipants - 1;

​

        Dictionary<int, int> playerCounts = new Dictionary<int, int>();

​

        for (int i = 0; i < numParticipants; i++)

        {

            playerCounts[i + 1] = 0;

        }

​

        for (int round = 1; round <= rounds; round++)

        {

            Console.WriteLine($"Round {round}:");

​

            for (int i = 0; i < numTeams; i++)

            {

                int team1 = i + 1;

                int team2 = (i + round) % numTeams + 1;

​

                Console.WriteLine($"Team {team1} vs. Team {team2}");

​

                // Shuffle participants for each team

                List<int> team1Players = Shuffle(participants.GetRange(i * 2, 2));

                List<int> team2Players = Shuffle(participants.GetRange((i + round) % numTeams * 2, 2));

​

                Console.WriteLine($"  Player {team1Players[0]} vs. Player {team2Players[0]}");

                Console.WriteLine($"  Player {team1Players[1]} vs. Player {team2Players[1]}");

​

                // Update player counts

                playerCounts[team1Players[0]]++;

                playerCounts[team1Players[1]]++;

                playerCounts[team2Players[0]]++;

                playerCounts[team2Players[1]]++;

            }

​

            Console.WriteLine();

        }

​

        DisplayPlayerCounts(playerCounts);

    }

​

    static List<T> Shuffle<T>(List<T> list)

    {

        int n = list.Count;

        while (n > 1)

        {

            n--;

            int k = random.Next(n + 1);

            T value = list[k];

            list[k] = list[n];

            list[n] = value;

        }

​

        return list;

    }

​

    static void DisplayPlayerCounts(Dictionary<int, int> playerCounts)

    {

        Console.WriteLine("Player Counts:");

​

        foreach (var entry in playerCounts)

        {

            Console.WriteLine($"Player {entry.Key}: {entry.Value} times");

        }

    }

}

​