using System;

public class Program

{

    public static void Main()

    {

        //Nhap thoi gian

        Console.WriteLine("Input time (s): ");

        int time = Convert.ToInt32(Console.ReadLine());

        //Quy doi thoi gian

        int timeleft = 0;

        int hour = time / 3600;

            timeleft = time % 3600;

            time = timeleft;

        int min = time / 60;

            timeleft = time % 60;

            time = timeleft;

        int sec = time;

        //Xuat thoi gian

        Console.WriteLine("{0:0#} : {1:0#} : {2:0#}",hour,min,sec);

        Console.ReadLine();

    }

}