import java.io.IOException;
import java.util.Scanner;
public class Main {

	public static void main(String[] args) throws IOException {
		// TODO ?????????????????????????????????????????????
       Scanner sc = new Scanner(System.in);
       int s = sc.nextInt();
       
       int h,m,b;
       h=s/3600;
       m=(s%3600)/60;
       b=((s%3600)-m*60);
       System.out.println(h+":"+m+":"+b);
       
       
	}

}
/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