import java.util.Scanner;

public class Main {

	public static void main(String[] args)  {

		Scanner scaner = new Scanner( System.in );

		int time = Integer.parseInt( scaner.next() );
		final int HOUR = 3600;
		final int MINUTE = 60;

		int hour ;
		int minute ;
		int second  ;
		int remain;

		hour   = time / HOUR;
		remain = time % HOUR;

		minute = remain / MINUTE;
		remain = remain % MINUTE;

		second = remain;

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

		scaner.close();

	}

}
/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