import java.util.Scanner;

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

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