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