import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		 Scanner sc = new Scanner(System.in);
	     int S = sc.nextInt();
	     int h = S/3600 ;
	     int m = (S-h*3600)/60;
	     int s = S-h*3600-m*60;
	     
	     System.out.println(h+ "" +":"+ "" +m+ "" +":"+ "" +s);

	    
	     
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		 Scanner sc = new Scanner(System.in);
	     int S = sc.nextInt();
	     int h = S/3600 ;
	     int m = (S-h*3600)/60;
	     int s = S-h*3600-m*60;
	     
	     System.out.println(h+ "" +":"+ "" +m+ "" +":"+ "" +s);

	    
	     
	}

} Main public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		 Scanner sc = new Scanner(System.in);
	     int S = sc.nextInt();
	     int h = S/3600 ;
	     int m = (S-h*3600)/60;
	     int s = S-h*3600-m*60;
	     
	     System.out.println(h+ "" +":"+ "" +m+ "" +":"+ "" +s);

	    
	     
	} main {
		// TODO 自動生成されたメソッド・スタブ
		 Scanner sc = new Scanner(System.in);
	     int S = sc.nextInt();
	     int h = S/3600 ;
	     int m = (S-h*3600)/60;
	     int s = S-h*3600-m*60;
	     
	     System.out.println(h+ "" +":"+ "" +m+ "" +":"+ "" +s);

	    
	     
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int S = sc.nextInt(); S sc.nextInt() sc.nextInt sc int h = S/3600 ; h S/3600 S 3600 int m = (S-h*3600)/60; m (S-h*3600)/60 (S-h*3600) S h*3600 h 3600 60 int s = S-h*3600-m*60; s S-h*3600-m*60 S-h*3600-m*60 S 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 String[] args args public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		 Scanner sc = new Scanner(System.in);
	     int S = sc.nextInt();
	     int h = S/3600 ;
	     int m = (S-h*3600)/60;
	     int s = S-h*3600-m*60;
	     
	     System.out.println(h+ "" +":"+ "" +m+ "" +":"+ "" +s);

	    
	     
	}

} public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		 Scanner sc = new Scanner(System.in);
	     int S = sc.nextInt();
	     int h = S/3600 ;
	     int m = (S-h*3600)/60;
	     int s = S-h*3600-m*60;
	     
	     System.out.println(h+ "" +":"+ "" +m+ "" +":"+ "" +s);

	    
	     
	}

} Main
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		 Scanner sc = new Scanner(System.in);
	     int S = sc.nextInt();
	     int h = S/3600 ;
	     int m = (S-h*3600)/60;
	     int s = S-h*3600-m*60;
	     
	     System.out.println(h+ "" +":"+ "" +m+ "" +":"+ "" +s);

	    
	     
	}

}
