import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int x = s.nextInt();
        int hour = (int)Math.ceil(x / 3600);
        int minutes = (int)Math.ceil((x - hour * 3600 ) / 60);
        int second = (x - hour * 3600 - minutes * 60);

        System.out.println(hour + ":" + minutes + ":" +second);
    }

}
/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