Adding a task

Hi
I just added a task. How can I make it public? When i send my own solution it says "System error" what's this? Please help

You must add checker.

And how can i make it public?

Just admin and moderators(me).

Can you please make my problem public? It's from Iranian national olympiad in informatics.

Read this http://www.z-trening.com/static.php?page=mytask_texts.

Thanks.
I just made it look all right.
Can you please make a new section in Training part called:
Iranian Olympiad in Informatics
??
I have about 30 of their problems and they are nice problems (at least in my opinion.)

It will be done.

Thanks