import java.util.Scanner;
class Main{
	public static void main(String[]args){
		Scanner sc = new Scanner(System.in);
		int S = sc.nextInt();
		int h = 0;
		int m =0;
		int s = 0;
		h=S / 3600;
		m = (S  - h * 3600) / 60;
		s = S -(h*3600+m*60);
		System.out.println(h+":"+m+":"+s);
		sc.close();
	}
} import java.util.Scanner; Scanner java.util class Main{
	public static void main(String[]args){
		Scanner sc = new Scanner(System.in);
		int S = sc.nextInt();
		int h = 0;
		int m =0;
		int s = 0;
		h=S / 3600;
		m = (S  - h * 3600) / 60;
		s = S -(h*3600+m*60);
		System.out.println(h+":"+m+":"+s);
		sc.close();
	}
} Main public static void main(String[]args){
		Scanner sc = new Scanner(System.in);
		int S = sc.nextInt();
		int h = 0;
		int m =0;
		int s = 0;
		h=S / 3600;
		m = (S  - h * 3600) / 60;
		s = S -(h*3600+m*60);
		System.out.println(h+":"+m+":"+s);
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int S = sc.nextInt();
		int h = 0;
		int m =0;
		int s = 0;
		h=S / 3600;
		m = (S  - h * 3600) / 60;
		s = S -(h*3600+m*60);
		System.out.println(h+":"+m+":"+s);
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int S = sc.nextInt(); S sc.nextInt() sc.nextInt sc int h = 0; h 0 int m =0; m 0 int s = 0; s 0 h=S / 3600 h S / 3600 S 3600 m = (S  - h * 3600) / 60 m (S  - h * 3600) / 60 (S  - h * 3600) S h * 3600 h 3600 60 s = S -(h*3600+m*60) s S -(h*3600+m*60) S (h*3600+m*60) h*3600 h 3600 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 sc.close() sc.close sc String[]args args
import java.util.Scanner;
class Main{
	public static void main(String[]args){
		Scanner sc = new Scanner(System.in);
		int S = sc.nextInt();
		int h = 0;
		int m =0;
		int s = 0;
		h=S / 3600;
		m = (S  - h * 3600) / 60;
		s = S -(h*3600+m*60);
		System.out.println(h+":"+m+":"+s);
		sc.close();
	}
}