import java.util.Scanner;

/**
 * Created by labuser on 2016/04/15.
 */
public class Main {
    public static void main(String[] args) {
        new Main().run();
    }

    private void run() {
        int s;
        int h;
        int m;
        int sl;

        Scanner sc = new Scanner(System.in);
        s = Integer.parseInt(sc.nextLine());

        h = s / 3600;
        m = s % 3600 / 60;
        sl = s % 3600 % 60;
        System.out.println(h+":"+m+":"+sl);

    }
}
/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