Since almost every member of the community Codeforces know how to write programs, we decided to abandon the wysiwyg HTML editor, and introduce a geek method. Of course, technical texts will gain much more convenient, and text will look uniform.

Now we use modified Markdown as a markup language for blog posts and comments. Since we use an additional extensions, we called markup simply Codeforces Markup. Codeforces custom tags are available in the editor, I will publish a description of the rest here a little later. In a few words it looks like simplified previous version — double square brackets are replaced by single square bracket.

In addition, we improved typography posts and comments.

See description Markdown using the links:

• http://en.wikipedia.org/wiki/Markdown
• http://daringfireball.net/projects/markdown/syntax
• http://bywordapp.com/markdown/syntax.html

Here's a short list of features:

1. insert user handle (use ~tourist);
2. italic and bold;
3. inline code — return a == 0 ? b : gcd(b % a, a); (place it between `);
4. numerated, unnumerated and nested lists;
5. headers;
6. autocorrection hyphens with dashes;
7. smart URL detection (makes them to be links) http://mirror.codeforces.com/;
8. tables and images;
9. source code highlighting;
10. "smart" quotes;
11. separate paragraphs with a blank lines;
12. special Codeforces tags;
13. insert photos like [photoalbum:PicasaPublicAlbumURL];
14. and much more!

I recall that on Codeforces implement preview, so you do not need crazy experiments on the Markdown in comments:)

MikeMirzayanov