import java.util.Scanner;

//?§????????????????S???hms?????????????????????????????°??????
public class Main{


	public static void main(String[] args){

		//?¨??????\???
		Scanner scan=new Scanner(System.in);
		int a=scan.nextInt();
		area(a);


	}

	//????????¢?????¢???????±?????????????????????????
	private static void area(int a){

		int h, m, s;
		h=a/3600;
		m=(a%3600)/60;
		s=((a%3600)%60);
		System.out.println(h+":"+m+":"+s);
	}


}
/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