using System;

public class Program

{

    public static void Main()

    {

        int x = 0; // single hours count

        int y = 0; // double hours count

        int players = 0;

        int playersAvailable = 0;

        int[,] times;

​

​

        Console.WriteLine("How many players?");

        players = Convert.ToInt32(Console.ReadLine());

        times = new int[players,2];

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

        {

            string input = Console.ReadLine();

            string[] timesInput = input.Split(' ');

            times[i,0] = Convert.ToInt32(timesInput[0]);

            times[i,1] = Convert.ToInt32(timesInput[1]);

        }

        for (int hour = 9 ; hour < 18 ; hour++) 

        {

            int j = 0;

            playersAvailable = 0;

            for (j = 0 ; j < players ; j++) 

            {

                if (times[j,0] <= hour && hour < times[j,1])

                {

                    playersAvailable += 1;

                }

            }

            if (playersAvailable >= 4) // can play a doubles game this hour

            {

                y += 1;

            }

            else if (playersAvailable >= 2) // can play a singles game this hour

            {

                x += 1; 

            }

            Console.WriteLine("Players available for {0} o'clock: {1}", hour, playersAvailable);

            Console.WriteLine("Next hour...");

        }

​

        Console.WriteLine("{0}, {1}", x, y);

    }

}