//2 א

using System;

double num = 1;

double sum = 0 ; 

double sofer = 0 ;

double average = 0 ;

while (num > 0) {

    Console.WriteLine("Enter a number:");

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

    if (num % 2 == 1 && num > 0) {

        sum += num ; 

        sofer++ ; 

    }

    average = sum / sofer ;

}

Console.Write(average) ;