import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

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

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

		Scanner scanner = new Scanner(System.in);
		int s = scanner.nextInt();
		int h = s/3600;
		s%= 3600;
		int m = s/60;
		s%= 60;
		System.out.println(h + ":" + m + ":" + s);
	} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int s = scanner.nextInt(); s scanner.nextInt() scanner.nextInt scanner int h = s/3600; h s/3600 s 3600 s%= 3600 s 3600 int m = s/60; m s/60 s 60 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 scanner = new Scanner(System.in);
		int s = scanner.nextInt();
		int h = s/3600;
		s%= 3600;
		int m = s/60;
		s%= 60;
		System.out.println(h + ":" + m + ":" + s);
	}
} public class Main {

	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);
		int s = scanner.nextInt();
		int h = s/3600;
		s%= 3600;
		int m = s/60;
		s%= 60;
		System.out.println(h + ":" + m + ":" + s);
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

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