using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

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

​

            int[] arrayInt = { 6, 17, 8, 5, 25 };

​

            Console.Write("Enter number: ");

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

​

            for (int i = 0; i < arrayInt.Length; i++)

            {

                iList.Add(arrayInt[i] - input);

​

            }

​

            int highestnum = iList.Max();

            int index = 0;

            for (int x = 0; x < iList.Count; x++)

            {

                if ((iList[x] < highestnum & iList[x] >= 1) || iList[x] == highestnum)

                {

                    highestnum = iList[x];

                    index = x;

                }

            }

​

​

         Console.WriteLine(arrayInt[index]);

           Console.ReadLine();

    }

}