#include <iostream>
#include <string>

using namespace std;

void print_with_formatting( const unsigned int value )
{
    if( value == 0 )
    {
	cout << "00";
    }
    else if( value < 10 )
    {
	cout << "0" << value;
    }
    else
    {
	cout << value;
    }
}

int main()
{
    const static unsigned int SECONDS_IN_AN_HOUR    =	3600;
    const static unsigned int SECONDS_IN_A_MINUTE   =	60;

    cout << "Enter time value in seconds: ";
    unsigned int ui_tv;
    cin >> ui_tv;

    if( ui_tv > 0 )
    {
	print_with_formatting( (unsigned int)(ui_tv / SECONDS_IN_AN_HOUR) );
	cout << ":";
	print_with_formatting( (unsigned int)((ui_tv % SECONDS_IN_AN_HOUR) / SECONDS_IN_A_MINUTE) );
	cout << ":";
	print_with_formatting( (unsigned int)((ui_tv % SECONDS_IN_AN_HOUR) % (SECONDS_IN_A_MINUTE)) );
    }
    else
    {
	cout << "00:00:00";
    }
    cout << endl;

    return 0;
}