import java.util.Scanner;

public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        int s = sc.nextInt();
        int h = s / 60 / 60;
        int m = (s - h * 60 * 60) / 60;
        s = s % 60;

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

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

        System.out.println(h + ":" + m + ":" + s);
    } main {
        Scanner sc = new Scanner(System.in);
        int s = sc.nextInt();
        int h = s / 60 / 60;
        int m = (s - h * 60 * 60) / 60;
        s = s % 60;

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

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

        System.out.println(h + ":" + m + ":" + s);
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String... args) {
        Scanner sc = new Scanner(System.in);
        int s = sc.nextInt();
        int h = s / 60 / 60;
        int m = (s - h * 60 * 60) / 60;
        s = s % 60;

        System.out.println(h + ":" + m + ":" + s);
    }
}
