import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        final Scanner scanner = new Scanner(System.in);
        int sec = Integer.parseInt(scanner.nextLine());
        int hour = sec / (60 * 60);
        sec -= hour * 60 * 60;
        int min = sec / 60;
        sec -= min * 60;

        System.out.println(hour + ":" + min + ":" + sec);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz