Trailing Zeroes in N! - ver 2

using System;

class TrailingZeroesInNFactorial
{
    static void Main()
    {
        long n = long.Parse(Console.ReadLine());
        long countZero = 0;

        for (int i = 1; i <= n; i++)
        {
            if (i % 5 == 0)
            {
                   countZero+= GetFive(i);
            }
        }

        Console.WriteLine(countZero);
    }


    static int GetFive(long number)
    {
        int count = 0;
        while (number % 5 == 0)
        {
            number = number / 5;
            count++;
        }
        return count++;
    }
}