
import java.util.Scanner;

class Main{
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        String strInput = input.nextLine();
        int hour = Integer.parseInt(strInput)/3600;
        int min = (Integer.parseInt(strInput)%3600)/60;
        int sec = (Integer.parseInt(strInput)%3600)%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