import java.util.Scanner;

class Main {
    int S,h,m,s;
    public void suzuki(){

        Scanner sc = new Scanner(System.in);

        S = sc.nextInt();
        h = S / 3600;
        m = (S - (h * 3600)) / 60;
        s = S - (h * 3600) - (m * 60);
        System.out.println(h + ":" + m + ":" + s);
    }

    public static void main(String[] args){

        new Main().suzuki();
    }

} import java.util.Scanner; Scanner java.util class Main {
    int S,h,m,s;
    public void suzuki(){

        Scanner sc = new Scanner(System.in);

        S = sc.nextInt();
        h = S / 3600;
        m = (S - (h * 3600)) / 60;
        s = S - (h * 3600) - (m * 60);
        System.out.println(h + ":" + m + ":" + s);
    }

    public static void main(String[] args){

        new Main().suzuki();
    }

} Main int S S h h m m s; s public void suzuki(){

        Scanner sc = new Scanner(System.in);

        S = sc.nextInt();
        h = S / 3600;
        m = (S - (h * 3600)) / 60;
        s = S - (h * 3600) - (m * 60);
        System.out.println(h + ":" + m + ":" + s);
    } suzuki {

        Scanner sc = new Scanner(System.in);

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

        new Main().suzuki();
    } main {

        new Main().suzuki();
    } new Main().suzuki() new Main().suzuki new Main() String[] args args
import java.util.Scanner;

class Main {
    int S,h,m,s;
    public void suzuki(){

        Scanner sc = new Scanner(System.in);

        S = sc.nextInt();
        h = S / 3600;
        m = (S - (h * 3600)) / 60;
        s = S - (h * 3600) - (m * 60);
        System.out.println(h + ":" + m + ":" + s);
    }

    public static void main(String[] args){

        new Main().suzuki();
    }

}