于心有愧丶

C. Jury Markstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputPolycarp watched TV-show where k jury members

D - Unfair PollOn the Literature lesson Sergei noticed an awful injustice, it seems that some students are asked more often than others.Seating in the class looks like a rectangle, where n

C - Dasha and friendsRunning with barriers on the circle track is very popular in the country where Dasha lives, so no wonder that on her way to classes she saw the following situation:The

D - Dasha and PasswordAfter overcoming the stairs Dasha came to classes. She needed to write a password to begin her classes. The password is a string of length n which satisfies the followi