「Can you hear me?」
Hello,FZUOJers! XDFZOI January Contest (Silver) will be held at 18:00 on Friday, January 31st, 2020. I'm extending my sincere invitation and the round is rated for everyone.
All problems will be set by me, whose quality is much higher than the last contest I prepared!
You will be asked to solve 7 problems within 180 minutes.
Don't blame me if there exists any unexpected problem. :)
Supposing that you solved all the problems, don't laugh at me. :)
A mysterious award has been prepared for winners.
Attention: The contest will be held on OI rules,and every problem has its own score. Please carefully consider the order of solving the problems. Since the background of problems may be a little long, you can AK this contest and then read the background story. :) The order of problems does not indicate their difficulty.
The Score distribution will be given later.
Hope everyone good luck and high rating!
UPD1: The Score distribution: 25-25-60-40-60-80-10
UPD2: The tutorial and data are here.