Invitation to CodeChef May Lunchtime 2020

radoslav192 · May 29, 2020, 2:02pm

We invite you to participate in CodeChef’s May Lunchtime, this Saturday, 30th May, from 7:30 pm to 10:30 pm IST

3 hours, 5 problems.

We will also be hosting live problem discussion sessions where our panelist, rajarshi_basu will discuss the Lunchtime problems. Find more details here.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef’s contests, you can share them here.

Joining me on the problem setting panel are:

Setters: Vivek vivek_1998299 Chauhan , Raj hackslash_123 Khandor ,Vinit vitz_6 Solanki , Shahjalal sjshohag Shohag , Ritesh rishup_nitdgp Gupta
Admin: Teja teja349 Vardhan Reddy
Tester: Radoslav radoslav192 Dimitrov
Editorialist: Taranpreet taran_1407 Singh
Post Contest Streaming: Rajarshi rajarshi_basu Basu
Statement Verifier: Jakub xellos0 Safin
Mandarin Translator: Gedi stzgd Zheng
Vietnamese Translator: Team songuku95 VNOI
Russian Translator: Fedor gomelfk Korobeinikov
Bengali Translator: Mohammad solaimanope Solaiman
Hindi Translator: Akash devils_code Srivastava

Prizes:

Top 10 Indian and top 10 Global school students from ranklist will receive certificates and CodeChef laddus, with which they can claim cool CodeChef goodies. Know more here.

Good luck and have fun!

ssrivastava990 · May 30, 2020, 7:21am

A humble request , please make sure that test cases are strong enough so the brute force solution will not work @admin

mathemaniac · May 30, 2020, 7:35am

This Line makes me happy. Looking forward to some great Problems and an awesome editorial by him.

taran_1407 · May 30, 2020, 8:49am

@mathemaniac
Editorials are also waiting for contest end to be posted

mathemaniac · May 30, 2020, 10:24am

Indeed !!

admin · May 30, 2020, 1:40pm

Reminder: The contest starts in 20 minutes.

saurabhshadow · May 30, 2020, 1:52pm

Tomorrow is an Indian Contest at Codeforces and today it’s almost an Indian Lunchtime at Codechef.

swapnil159 · May 30, 2020, 4:43pm

@taran_1407 orz

better_sleep · May 30, 2020, 4:45pm

Really good problems.
Would surely learn a lot. Thank you to the whole team.
We appreciate your efforts

saurabhshadow · May 30, 2020, 5:02pm

What a good level of problems!!

codingisfood · May 30, 2020, 5:11pm

Problem TREE DIFFERENCE was same as this problem CLOSEFAR Problem - CodeChef . Could you please look into this as its solution is just a google search away. @admin

rishup_nitdgp · May 30, 2020, 5:14pm

The both problems have different constraints and TREEDIFF has only one type of query.

vivek_1998299 · May 30, 2020, 5:17pm

No, it isn’t. The constraints are totally different(Mo’s might probably time out, I couldn’t find any solution of mo’s submitted/passed in this problem). Also the intended solutions are different.

codingisfood · May 30, 2020, 5:21pm

This one might work here Mo's Algorithm on Trees [Tutorial] - Codeforces with additional constraint that if number of distinct values is greater than max(A) then answer is 0. Also, constraints dont matter because values of array A are restricted upto 100.

taran_1407 · May 30, 2020, 5:22pm

The editorials for all problems are posted and can be accessed via Topics tagged ltime84

Hope you guys had a great contest!