This piece of user script is to help user to print the question page with a neat layout, or save a copy of the question in Markdown format.
After the menu item of Prepare to print is clicked, it removes all unnecessary elements and append a date to the top right corner of the page. So you will get a printer-friendly AcWing question page, which you can go directly to print it with your favorite browser.
After the menu item of Show Markdown is clicked, it create a text box for the raw string in Markdown format, and automatically copies it to your clipboard.
