Dimbata_pedal

#include "stdafx.h"
#include <iostream>

using namespace std;

int main()
{
    int num;
    cin >> num;

    int counter = 0;

    while (num >= 5)
    {
        counter += num / 5;
        num /= 5;
    }

    cout << counter << endl;
    return 0;
}