import java.util.Scanner;



public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int s,m,h;
		s = sc.nextInt();

		h = s / 3600;
		m = (s%3600) / 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,m,h;
		s = sc.nextInt();

		h = s / 3600;
		m = (s%3600) / 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,m,h;
		s = sc.nextInt();

		h = s / 3600;
		m = (s%3600) / 60;
		s = s % 60;

		System.out.println(h + ":" + m + ":" + s);
	} main {
		Scanner sc = new Scanner(System.in);
		int s,m,h;
		s = sc.nextInt();

		h = s / 3600;
		m = (s%3600) / 60;
		s = s % 60;

		System.out.println(h + ":" + m + ":" + s);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int s s m m h; h s = sc.nextInt() s sc.nextInt() sc.nextInt sc h = s / 3600 h s / 3600 s 3600 m = (s%3600) / 60 m (s%3600) / 60 (s%3600) s 3600 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,m,h;
		s = sc.nextInt();

		h = s / 3600;
		m = (s%3600) / 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,m,h;
		s = sc.nextInt();

		h = s / 3600;
		m = (s%3600) / 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,m,h;
		s = sc.nextInt();

		h = s / 3600;
		m = (s%3600) / 60;
		s = s % 60;

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

}

