import java.util.Scanner;
public class Main{
	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		int time=sc.nextInt();

		int h=time/3600;
		int m=(time-h*3600)/60;
		int s=time%60;
		
		sc.close();
		
		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 time=sc.nextInt();

		int h=time/3600;
		int m=(time-h*3600)/60;
		int s=time%60;
		
		sc.close();
		
		System.out.println(h+":"+m+":"+s);
	}

} Main public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		int time=sc.nextInt();

		int h=time/3600;
		int m=(time-h*3600)/60;
		int s=time%60;
		
		sc.close();
		
		System.out.println(h+":"+m+":"+s);
	} main {

		Scanner sc=new Scanner(System.in);
		int time=sc.nextInt();

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

		int h=time/3600;
		int m=(time-h*3600)/60;
		int s=time%60;
		
		sc.close();
		
		System.out.println(h+":"+m+":"+s);
	}

} public class Main{
	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		int time=sc.nextInt();

		int h=time/3600;
		int m=(time-h*3600)/60;
		int s=time%60;
		
		sc.close();
		
		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 time=sc.nextInt();

		int h=time/3600;
		int m=(time-h*3600)/60;
		int s=time%60;
		
		sc.close();
		
		System.out.println(h+":"+m+":"+s);
	}

}