Hi. My Pafos and Petrozavodsk contest has been uploaded to QOJ at https://qoj.ac/contest/1887. The contest took place last August at the Pafos and Petrozavodsk camps. I am glad to invite you to solve my tasks.

The contest itself contains some unique meta-ideas that I found funny:

• two problems with the same statements but different input constraints;
• a problem where I provide you the exact test generator;
• a problem where I spoil you with a very unobvious fact, and you have to prove it to solve the problem;
• a problem where

Enjoy.