Hello Codeforces,
I am Trung, co-founder and head organizer of HNOI Civil War 2019. We believe that organizing contests for high school students to inspire about competitive programming, computer science and algorithms is not enough, so that we have taken further steps to contribute to our community. By sharing knowledge/ideas via interesting visual-audio content, we hope to bring the sense of real sport in competitive programming: enjoyable yet challenging.
So feel free to enjoy our first video on Youtube channel: HNOI Civil War Youtube channel. Subscribe to receive interesting videos about programming and algorithms. Also, our fanpage HNOI Civil War FB fanpage
We open a form for you to contribute any ideas/knowledge that you want to share with community via multiple social medias! https://forms.gle/g8KE9MTNdxqkuZFu5.
Finally, good luck with your Codeforces rating! And round 581 tomorrow!
By the way, thank you my friendz tRuNgSeO for editing the video on yOuTuBe
No problem <3
Honor to both my best friendz low_ and danielt_inthecity_boi_ for coming up with HCW.
And finally, you can submit here: https://vjudge.net/contest/321244#problem
Updates: Our second video
The solution to the weekly challenge #2: Solution here — youtube video
I have updated the link in the comment above. Please re-check: Final solution video link