using System;

public class Program

{

    public static void Main()

    { int i,n,ava=0,c=0;

     Console.WriteLine("insert 10 numbers");

     for (i=1; i<=10; i++)

     {

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

         if(n%2!=0)

         {c=c+1; ava=ava+n;}

     }

     Console.WriteLine("the avareage of the 10 numbers is:{0:f2}",(ava/c));

    }

}