import java.util.Scanner;

class Main
{
    public static void main(String args[])
    {
        Scanner scan = new Scanner(System.in);
        
        int S = scan.nextInt();
        int h = S/3600;
        int m = (S-3600*h)/60;
        int s = S%60;
        System.out.println(h+":"+m+":"+s);
    }
} import java.util.Scanner; Scanner java.util class Main
{
    public static void main(String args[])
    {
        Scanner scan = new Scanner(System.in);
        
        int S = scan.nextInt();
        int h = S/3600;
        int m = (S-3600*h)/60;
        int s = S%60;
        System.out.println(h+":"+m+":"+s);
    }
} Main public static void main(String args[])
    {
        Scanner scan = new Scanner(System.in);
        
        int S = scan.nextInt();
        int h = S/3600;
        int m = (S-3600*h)/60;
        int s = S%60;
        System.out.println(h+":"+m+":"+s);
    } main {
        Scanner scan = new Scanner(System.in);
        
        int S = scan.nextInt();
        int h = S/3600;
        int m = (S-3600*h)/60;
        int s = S%60;
        System.out.println(h+":"+m+":"+s);
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int S = scan.nextInt(); S scan.nextInt() scan.nextInt scan int h = S/3600; h S/3600 S 3600 int m = (S-3600*h)/60; m (S-3600*h)/60 (S-3600*h) S 3600*h 3600 h 60 int s = S%60; s S%60 S 60 System.out.println(h+":"+m+":"+s) System.out.println System.out System System.out h+":"+m+":"+s ":" m h+":"+m+":"+s h ":" m ":" s String args[] args
import java.util.Scanner;

class Main
{
    public static void main(String args[])
    {
        Scanner scan = new Scanner(System.in);
        
        int S = scan.nextInt();
        int h = S/3600;
        int m = (S-3600*h)/60;
        int s = S%60;
        System.out.println(h+":"+m+":"+s);
    }
}
