import java.util.Scanner;

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

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