import java.util.Scanner;
public class Main {
public static void main(String[] args) {
	Scanner sc = new Scanner(System.in);
 int s = sc.nextInt();
 int sec=(s%3600)%60;
 int min=(s%3600)/60;
 int hour=s/3600;
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