Inspired by similar blogs in the past (1, 2, 3 ) and the fact that I've probably reached near the peak rating I could on this website, I decided to do this.

Inspired by similar blogs in the past and contestants' reaction about the Kanpur Regional on various CP groups, making this blog...

Just to clarify, I have nothing to do with the contest. I am neither a contestant nor a setter/tester, just a regular contribution beggar.

Hi Codeforces,

ICPC Gwalior-Pune 2020 Regional Round will be held on Codedrills tomorrow.

Contest Details

• Contest Link — ICPC Gwalior-Pune 2020 Regional Round
• Date & Time — 18 August 2021, Wednesday, 18:00 IST
• Duration — 4 Hours
• There is a ranklist freeze of 60 minutes. Ranklist will freeze at 21:00 IST.
• There will be 10-13 questions to solve
• Will follow standard ICPC scoring system (20 minutes penalty and 1 point per problem)
• The problems may not be sorted by difficulty

Selection Criteria

• Top few teams will advance to World Finals

Clarifications

• Only ask the clarifications about the problems by messaging the private clarification group via discuss.
• Do not ask any doubts about the problems on this blog till the contest ends.

We recommend you to read the statements of all problems. Good luck & Have fun! May the best bugaboo solver win.

UPD1: Scoring distribution: 1 — 1 — 1 — 1 — 1 — 1 — 1 — 1 — 1 — 1 — 1 — 1

UPD 2 — Credits:

• Chief Judge: Balajiganapathi Balajiganapathi S
• Contest Admin: Vichitr Vichitr Gandas
• Setters: Kevin kevinsogo Atienza, Jatin jtnydv25 Yadav, Vichitr Vichitr Gandas, Vaibhav xennygrimmato Tulsyan, Saarang saarang Srinivasan
• Testers: Kshitij kshitij_sodani Sodani, Ashish Ashishgup Gupta, Kevin kevinsogo Atienza, Jatin jtnydv25 Yadav, Udit T1duS Sanghi, Ajinkya ajinkya1p3 Parab, Vaibhav xennygrimmato Tulsyan, Balajiganapathi Balajiganapathi S, Naveen mnaveenkumar2009 Kumar, Soumyaditya socho Choudhuri, Suneet ScarletS Mahajan, Vichitr Vichitr Gandas, , Ritul ritul_kr_singh Singh, Varad playing_it_my_way Kulkarni, Aswin aswinashok44 Ashok, Saarang saarang Srinivasan
• Platform Coordinator: Deepa deepa_panwar Panwar
• RCD: Dr. Joydip Dhar

UPD 3: Rank list has been released provisionally subject to plag checks. Check it out HERE. Congrats to the winners!

UPD 4: Problem Discussion Session is on 23rd Aug, 6 PM IST. Join us here.

Why is the queue stuck?

Hey all!

We hope you're doing well. Like last year, we're again looking to give back a little to the competitive programming community, in the form of mentorship. This mentorship is completely free. We're hoping to help aspiring competitive programmers do well at the ZCO, INOI and IOITC, and hopefully even represent India at the IOI!

We're setting up another Discord server, to mentor people trying out for the ZCO, INOI and IOITC. Last year, we had 16 people from our server qualify for IOITC. This time, there's a larger limit on the total number of people we can take, as we have many more mentors. However, we're trying to focus more on olympiad preparation this year. You're still welcome to apply if you think you'd benefit from Olympiad training but are ineligible for INOI.

We're also in the process of developing a resource similar to the USACO Guide, in order to help us organise our teaching better. Do note that we teach all the topics within the INOI syllabus, and also teach topics which can appear at IOITC and IOI.

Like last year, if you join the program, we'll help you by:

• Compiling useful practice problem sets to introduce you to a variety of different techniques
• Selecting problems to practice with
• Providing hints to solve problems in practice
• Discussing problems after a contest
• Recommending similar problems (if you’d like to reinforce a trick/observation)
• Providing debugging assistance
• Finding tutorials for classical techniques
• Hosting sessions to teach/discuss classical techniques (we now have a list of topics we'd like to cover in order, but we're usually also happy to teach other things as necessary)
• Hosting sessions to teach/discuss specific problems

If you think you'd benefit from mentorship, feel free to apply at our form here. We'll get back to you within a couple of weeks with a server invite link. If you have any questions, feel free to reach out to me with a message, or leave a comment here. The form will close on the 9th of July, 2021 at 12pm IST.

If you'd like to become a mentor (preferably with ZCO/INOI/IOITC experience), please also reach out to me(or socho) — we'd be glad to have you on board!

Thank you!

The current set of mentors is:

Me
socho
shiven
sahil_k
b23v
astoria
Aggu_01000101
ScarletS
kimbj0709
smjleo

Note: I would like to apologize for the name. It wasn't my choice. Ofcourse, DSU >> UFDS

Since IOI is in 10 days and there is no such blog yet, I made one.

TCO21 Algorithms Round 2A starts in 10 mins(and registrations end in 5 mins) but Topcoder applet doesn't seem to work. Neither for me nor for some people I asked.

This is what comes up.

Join this if you want to play among us with other fellow CPers: https://discord.gg/WbdcZRfgc4

What do you think is the order of difficulty of getting a medal in various olympiads like IOI,BOI,CEOI,APIO?

Does anyone know how to submit in python in topcoder. For C++, I do this — https://mirror.codeforces.com/blog/entry/61252

Someone posted APIO results here on codeforces a few hours back. I don't know why it was deleted. But, it was the following — https://apio.innopolis.university/results/apio/2019/org-apio-2019-main.html.

I just cleaned the list (Considered only top 6 from each countries and removed the people scoring 0)

Here it is http://p.ip.fi/yuUl

I think the cutoffs will be-

Gold — 260
Silver — 203
Bronze — 173

Greetings Codeforces community!

You all are invited to participate in CodeChef’s April Cook-Off sponsored by ShareChat. This is a short contest with 7 problems on offer. The problem statements will be available in English, Hindi, Bengali, Russian, Mandarin and Vietnamese.

ShareChat — our contest sponsor is seeking both interns and full-time employees to join their dynamic team. Job opportunities are open to programmers across the world and internship opportunities are exclusively aimed at final year B.Tech students who have already been placed and looking forward to gaining startup experience. Visit the contest page for more details.

I hope you will join your fellow programmers and enjoy the contest problems. Joining me on the problem setting panel are:
- Setters: T1duS (Udit Sanghi), Farhod (Farhod Khakimiyon), Kerim.K (Kerim Kochekov)
- Tester: teja349 (Teja Vardhan Reddy)
- Editorialist: adamant (Alexander Kulkov)
- Statement Verifier: Xellos (Jakub Safin)
- Mandarin Translator: huzecong (Hu Zecong)
- Vietnamese Translator: Team VNOI
- Russian Translator: Mediocrity (Fedor Korobeinikov)
- Bengali Translator: solaimanope (Mohammad Solaiman)
- Hindi Translator: Akash Shrivastava

Contest Details:

• Start Date & Time: 21st April 2019 (2130 hrs) to 22nd April 2019 (0000 hrs). (Indian Standard Time — +5:30 GMT) — Check your timezone
• Contest link: https://www.codechef.com/COOK105
• Registration: You just need to have a CodeChef handle to participate. For all those, who are interested and do not have a CodeChef handle, are requested to register in order to participate.
• Prizes: Top 10 performers in Global and Indian category will get CodeChef laddus, with which the winners can claim cool CodeChef goodies. Know more here: https://discuss.codechef.com/t/how-do-i-win-a-codechef-goodie/7344

(For those who have not yet got their previous winning, please send an email to winners@codechef.com)

Good Luck!

Hope to see you participating!!

Happy Programming!!

Hello! Does anyone have idea about APIO 2019 dates? I couldn't find anything online. Although going by the past dates, it looks it will be either 4-5th may or 11-12th.

Thanks!

My parents took away my laptop cuz of my school exams for the next 2 months. How should I do go about doing CP from mobile?

Hi, I haven't received google code jam tshirt yet. My friends have received them. I tried mailing codejam@google.com but didn't get any reply.

Hello, as APIO (both official contest and open contest) is over. Can we discuss solutions? Even if someone has solutions to subtasks please tell.

Why do most people use recursive segment tree when-
1. It is slower
2. It takes more memory
3. It is longer to code
4. It is harder to understand

??

Can Persistent Segment trees be written iteratively? If yes, can someone share their code?