Meta Hacker Cup Final Round has just finished and tourist just got the first place (did comeback in the last 5 minutes). Link to the scoreboard

Congratulations tourist

Codeforces Round 888 (Div. 3)A&B || Post-contest discussion || Escalator Conversations||Parity Sort

Video link:

https://www.youtube.com/watch?v=gy2ix3CxAII

Problem C || Tiles Comeback:

https://youtu.be/TWBy9mp-HXk

For those who strugled to solve div2 A problem this video may help you to understand it

https://www.youtube.com/watch?v=8rhnRzicPlc

You can write your thoughts on other problems in the comments

UPD: For those who strugled to solve div2 B problem this video can be useful:

https://www.youtube.com/watch?v=4Q2VH6VHuSk