import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scan = new Scanner(System.in);
		int second = scan.nextInt();
		if (second < 0 || second >= 86400) {
			System.out.println("Error!");
		} else {
			int hour = second/3600;
			int minute = (second - hour*3600)/60;
			System.out.println(hour + ":" + minute + ":" + (second - hour*3600 - minute*60));
		}
	}

}
/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