using System;

​

public class LongestArea

{

    public static void Main()

    {

        Console.Write("Enter n: ");

        int n = int.Parse(Console.ReadLine());

        string[] input = new string[n];

​

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

        {

            Console.Write("Enter string #{0}: ", i + 1);

            input[i] = Console.ReadLine();

        }

        string currString = input[0];

        Array.Sort(input);

        int currLength = 1;

        int bestLength = currLength;

​

        for (int i = 0; i < input.Length - 1; i++)

        {

            if (input[i] == input[i + 1])

            {

                currLength++;

            }

​

            else

            {

                currLength = 1;

            }

​

            if (bestLength < currLength)

            {

                bestLength = currLength;

                currString = input[i];

            }

        }

        Console.WriteLine(bestLength);

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

        {

            Console.WriteLine(currString);

        }

    }

}

​

​