using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter the length of Array: ");

        int[] numbers = new int[Convert.ToInt32(Console.ReadLine())];

        Console.WriteLine("Enter the numbers: ");

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

        {

            numbers[i] = Convert.ToInt32(Console.ReadLine());

        }

        Console.WriteLine("Enter the number you want to search: ");

        int num = Convert.ToInt32(Console.ReadLine());

        int index = 0;

        while(index < numbers.Length)

        {

            if(numbers[index] == num)

            {

                Console.WriteLine("Number found at index {0}", index);

                return;

            }

            index++;

        }

        Console.WriteLine("The number is not in the array");

    }

}