import java.util.Scanner;

public class Main {

    private static final String FORMAT = "%d:%d:%d";

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int targetSec = scanner.nextInt();

        int sec = targetSec % 60;
        int min = (targetSec / 60) % 60;
        int hour = (targetSec / (60 * 60));
        System.out.println(String.format(FORMAT, 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