using System;

public class Program

{

    public static void Main()

    {

        int pageCount = 245; 

        int pageNumber = 5; 

        int groupSize = 10;

        int middlePageNumber = (int)(Math.Ceiling((decimal)groupSize / 2));

            int pagesBeforeMiddle = groupSize - (int)middlePageNumber;

            int pagesAfterMiddle = groupSize - (pagesBeforeMiddle + 1);

            int startPage = 1;

            if (pageNumber >= middlePageNumber && pageNumber - pagesBeforeMiddle > 0) {

                startPage = pageNumber - pagesBeforeMiddle;

            } else {

                pagesAfterMiddle = groupSize - pageNumber;

            }

            int endPage = pageCount;

            if (pageCount >= (pageNumber + pagesAfterMiddle)) {

                endPage = (pageNumber + pagesAfterMiddle);

            }

            bool showFirstButton = startPage > 1;

            bool showLastButton = endPage < pageCount;

        Console.WriteLine(middlePageNumber);

        Console.WriteLine(startPage);

        Console.WriteLine(endPage);

    }

}