import java.util.Scanner;


public class Main {
	public static void main(String args[]){
		Scanner scanner = new Scanner(System.in);
		int input= scanner.nextInt();
		int hour=input/(60*60);
		int minute= (input%(60*60))/60;
		int second= (input%(60*60))%60;
		System.out.println(Integer.toString(hour)+":"+Integer.toString(minute)+":"+Integer.toString(second));
		scanner.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