Before you start, please read the following instructions on how to use LaTeX on these pages. If you prefer using notepad notation instead, don't bother.

At this moment you can discuss the problems from the competitions shown below. If you would like to discuss a problem that is not on this list, enter the "Questions" board on the left menu and write what you suggest (or, if you cannot wait, it is OK that you type your solution/comment there; we 'll move it when we open the corresponding discussion).