import java.util.NoSuchElementException;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        try {
            int s = Integer.parseInt(sc.nextLine());
            if (s >= 86400 || s < 0) {
                System.out.println("Input is incorrect");
                return;
            }
            int h = s / (60 * 60);
            int r = s % (60 * 60);
            int m = r / 60;
            r = s % 60;
            System.out.printf("%d:%d:%d\n", h, m, r);
        } catch (NoSuchElementException | NumberFormatException e) {
            System.out.println(e);
        }
    }
}


/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