NOTE: I'm very sorry to announce that for now we stopped awarding certificates because too many people spoiled solutions of the problems to internet. Currently I'm thinking of idea of a new, open-source version of the site, in which, I hope, we'll be able to eliminate plagiarism somehow. Supposedly, accounts would be migrated and then we'll be able to assign automatic certificates to everyone who deserved them.
For certain achievements you can be awarded with Certificate which will be presented in electronic form and also could be sent to you in paper via postal service.
Certificates are not awarded automatically simply because I usually do not know your name! (And also I may want to have a glance at your solutions, etc.)
Of course I'll try my best and attempt to guess what name to put onto the certificate, but you will save me from mistakes if you write as soon as possible. Thank you in advance! :)
Certificates are given in
hi-resprintable copy to hang it on the wall.
Certificate could be verified by its number on the special page - so that your friends, colleagues, teachers or bosses can check themselves that your certificate is not forged.
I hope there would not be such problems. But please know that in case of some discovered cheating your certificate could be revoked - i.e. it will disappear from your profile page and certificate check page will not confirm existence of its number.
There is a limited amount of certificates of each type. Any of them could be prolonged or superseded by some new type.
This is because site is growing slowly and new problems are added so, for example, solving
125 problems now could be
harder than year after (when some more problems are added and some simple among them). Also this will allow us to
change the design of certificates between versions to have more fun.
Currently here are only two types of certificates: