using System;

public class Program

{

    public static void Main()

    {

        int n, i, m=0, f=0;   

​

          Console.Write("Enter check Prime: ");    

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

          m=n/2;    

          for(i = 2; i <= m; i++)    

          {    

           if(n % i == 0)    

            {    

             Console.Write("Notttttt Prime.");    

             f=1;    

             break;    

            }    

          }    

          if (f==0)    

           Console.Write("Yesssssss Prime.");       

     }  

   }