import java.io.IOException;
import java.util.Scanner;




public class Main {

	public static void main (String[] args) throws IOException{
		Scanner S = new Scanner(System.in);
		String Str = S.nextLine();
		int SI = Integer.parseInt(Str);
		int seconds = SI%60;
		int hour = SI/3600;
		int minute = SI / 60 - hour * 60;
		System.out.println(hour + ":" + minute + ":" + seconds );
		
	}	
}
/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