# codechef long challenge june 2020

@admin just in case you haven’t taken any action regarding this yet, please ignore otherwise. This appeared in previous contest and a well known combinatorics problem. 2) Editorial, ICPC Indonesia COMPFEST 12 Multi-Provincial Contest Online Mirror Editorial, The Application of Lagrange Interpolation in Mathematics, CSES Problem Set update June 2019: New problems and hacking, Codeforces Round #447 (Div.2 Only) Editorial, Presenting TLE: the best Codeforces bot for Discord. The contest will be open for 10 days i.e. Thanks for reporting! In March 2020, to kick off our International Womenâs Day Special series, we had organized our first-ever month-long challenge â¦ I can confirm that roughly 10 hours ago I answered a question by hehaodele and my answer can be used as a solution to PPARTS. CodeChef was created as a platform to help programmers make it big in the world of algorithms, computer programming, and programming contests.At CodeChef we work hard to revive the geek in you by hosting a programming contest at the start of the month and two â¦ We hope that he gives us a similarly stunning performance in the IOI. The 13 â¦ We can calculate $$P(x)$$$in $$O(n \log n)$$$ since there $$O(n \log n)$$$summands. aya1909 ... CodeChef January Long Challenge 2020. Date-Time: 15th June 2020. We invite you to participate in CodeChefâs June Long Challenge, this Friday, 5th June, 15:00 IST onwards The contest will be op… (Just curious) @teja349, I see the return of just one editorialist for all problems. 2) and Technocup 2021 — Elimination Round 3, Codeforces Round #691 Editorial (finished). What do you drink or eat during a contest? The details are as follows: Agenda: Discussion of first 6-7 problems of JUNE20 problems. Yeah thanks, I did almost exactly that but I took the derivative of $$ln(1+x^k)$$$. Now that the contest is over can you tell your solution? About CodeChef June Long Challenge: CodeChef Long Challenge is a 10-day monthly coding contest where you can show off your â¦ Both players seem to have a special liking for Long Challenges as before this they faced off in the January Long Challenge. CodeChef - A Platform for Aspiring Programmers. 1, Div. Well, finally the wait is over!! CodeChef June Long Challenge Problem Name: The Tom and Jerry Game! I tried to solve it in 3 passes. It ran in first attempt but I had done a few optimizations. The second session will be covered the next day, as detailed here. [Beta] Harwest — Git wrap your submissions this Christmas. We invite you to participate in CodeChefâs June Long Challenge, this Friday, 5th June, 15:00 IST onwards. With 32,416 participants and 5,56,044 submissions, the 10-day coding challenge had put the best to test, thanks to our star problem setters. I find two reason for this, Plagiarism (that usually remain undetected as person change the name of variable ,use different templates etc). He has a great interest in Competitive programming and can be seen regularly taking part in coding competitions like Google CodeJam and Google â¦ Am I eligible for any laddus(assuming ranklist is unaffected after MOSS)? We invite you to participate in CodeChef’s June Long Challenge, this Friday, 5th June, 15:00 IST onwards The contest will be open for 10 days i.e. In pass 1 i selected the triplets which after performing operation on all 3 will make all 3 go at their correct â¦ These live sessions are organized and created by CodeChef â¦ Regarding problem TRPLSRT of codechef long challenge may 2020 div 2. I tried segtree on dfs time array where each node is a persistent segtree, and ended up having to create 7e7 nodes per case. 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. https://codeforces.com/blog/entry/61306?#comment-452948. Never participated thereafter. :(. until 13th July. Code. Because, if someone wanted to cheat then he/she would have used fake account instead of original.Just a possibility wanna share. I used Sack (DSU on Tree) along with a persistent segtree to do it in Nlog²N. !Happy Programming !! In Division A, white2302, a student of the Moscow Institute of Physics and Technology, secured the top spot. Know more here. programming codechef codechef-solutions lunchtime codechef-long codechef-long-challenge codechef-competition may-2020 programming-vidya julylongchallenge Updated Dec 16, 2020 C++ I solved it by applying the xDln operator on the question which converted it into a simpler form. This is evident in my rating graph. â¦ You can do a lot of productive things other than opening discuss. At CodeChef, we work hard to revive the geek in you by hosting a programming contest at the start of the month and another smaller programming challenge in the middle of the month. You can get the best discount of up to 70% off. Active 1 year, 5 months ago. Stop participating in these plagiarized challenges. Now the article is deleted, but there is already some witness (Um_nik). Tag list. Apart from this, my segtree was persistent as well as Dynamic. Occasionally come back to join contests, I like the challenge contest, And I have some ideas for solving the challenging problem with machine learning, I want to try, @teja349 @admin Can you look into this and short this out? programming codechef codechef-solutions lunchtime codechef-long codechef-long-challenge codechef-competition may-2020 programming-vidya julylongchallenge Updated Dec 16, 2020 C++ First to solve each problem except challenge — 100 laddus. PS: CodeChef_admin Remove these ridiculous longs and start some Dinner/Break-Fast, post editorials at the right time. Many are directly asking on their blog for test cases regarding some problems and some are even sharing there solutions. User hehaodele, currently in rank 8, solved the problem PPARTS by asking in the CF forum in the last 5 hours, pretending it is the problem he came up with. Problem ID: EOEO Pre-requisite - Observation Start from â¦ Weâre halfway through the year and its time for our sixth Long Challenge of the year 2020. CodeChef_admin Remove these ridiculous longs, There exists many who hate Codechef Longs & its braggers in discuss. I did that mistake once. Instead come with something like Dinner, Breakfast, Snacks or something else. until 15th June.. Also, if you have some original and engaging problem ideas, and youâre interested in them being used in CodeChefâ¦ Contribute to js0805/Codeforces-codechef-solutions development by creating an account on GitHub. Good Luck!Hope to see you participating! My name is on 19th in the following list : https://www.codechef.com/rankings/JUNE20A?filterBy=Country%3DIndia&order=asc&sortBy=rank (filter :India, sort : ASC). We have removed the user from the ranklist, and blocked their account on CodeChef. Codechef â¦ CodeChef was started in 2009 by Bhavin and team as part of Directi, to be a platform to help programmers enhance their skills, and create a community that fosters learning and growth. Hey all, We plan to have an informal live stream for discussing the problems of June Long Challenge 2020. The invitation is here. We invite you to participate in CodeChefâs June Long Challenge, this Friday, 5th June, 15:00 IST onwards The contest will be open for 10 days i.e. I am only for this one contest due to other admin having some other work. It's so sad to see Codechef this way. 16:00 â¦ We'll update here if they provide any reasonable explanation for what's happened. Don't let things change your good character. ACRush was the star once more bagging gold, â¦ Doesn't matter if it appeared before, cheatin's cheatin'. questions tags users badges unanswered ask a question about faq. Um_nik answered the question saying that he learned it 4 days ago. :facepalm: Top 20 performers in Indian category would mean top 20 in div1, or is top 10 from each division. Are you going to block all those users who witnessed this/got AC after that blog? We invite you to participate in CodeChefâs July Long Challenge, this Friday, 3rd July, from 15:00 IST onwards.. We will also be hosting live problem discussion sessions where our panelist, rajarshi_basu will discuss the Long Challenge problems on 13th July. (I have the link to the video but I don’t think its a good idea to post it here ). Long challenge sounds odd one out from Lunchtime and Cook-off, so contest like Snacks , Dinner, Break-Fast will sound far more logical. You admitted you are cheating.I never said you are hehaodele you only bought this here. Did anyone manage to fit $$O(nlog^2n)$$$in TL for DIFVAL? We have removed the user from the ranklist, and blocked their account on CodeChef. And integrated it to get the same result you got. We all know that these absolutely logical words will have no effect whatsoever. pllk â CSES Problem Set update June 2019: New problems and hacking . Codechef Long Challenge Solutions Overview. June 18, 2020 1 min read. CodeChef Long Challenge is a 10-day monthly coding contest where you can â¦ Weâre halfway through the year and its time for our sixth Long Challenge of the year 2020. Post our May Lunchtime contest, we bring you the monthly recap of our highly contended June Long Challenge. 1 + Div. If yes then how many. The new discount codes are constantly updated on Couponxoo. until 15th June. We’re halfway through the year and its time for our sixth Long Challenge of the year 2020. Here's the link to the solution: https://www.codechef.com/viewsolution/34062043, CodeChef_admin Hey I think its the time to either reduce the duration of long challenge maybe to 2 or 3 days or stop conducting long challenge. Still participating in long-plagiarized-contests? I am a witness too. Browse other questions tagged python python-3.x or ask your own question . Weâre halfway through the year and its time for our sixth Long Challenge of the year 2020. Wow not supporting anyone,but might be genuine mistake of this guy, as I solved this question and I too was curious how to optimise the solution, I didn't knew until it is long challenge question. To this very end, CodeChefâs Women in Competitive Programming (WICP) community was born, as a means to encourage, celebrate, and support women coders and programmers. until 15th June.. Also, if you have some original and engaging problem ideas, and youâre interested in them being used in CodeChefâ¦ The only programming contests Web 2.0 platform, https://www.codechef.com/viewsolution/34062043, https://www.codechef.com/rankings/JUNE20A?filterBy=Country%3DIndia&order=asc&sortBy=rank, Invitation to CodeChef December Cook-Off 2020, Technocup 2021 Elimination Round 3 and Round #692 (Div. Contest Details: Duration: 2.5 hours; Start Date: Sunday, 21 st June, 2020 at 21:30 HRS (IST) End Date: Monday, 22 nd June, 2020 at 00:00 HRS (IST) Check your timezone here. This Forum is in read only mode now. The latest ones are on Dec 15, 2020 Invitation to CodeChef June Long Challenge 2020. â¦ Joining me on the problem setting panel are: Setters: Sahil sahi1422 Chimnani , Naman smartnj Jain ,Vinit vitz_6 Solanki , Vikas pandey__ji Pandey , Sofia sonechko Melnyk , Ildar gainullinildar Gainullin ,Taranpreet taran_1407 Singh , Raja raja1999 Vardhan Reddy , Arthur arthurfn Nascimento, Editorialist & Post Contest Streaming: Rajarshi rajarshi_basu Basu, Vietnamese Translator: Team songuku95 VNOI, Russian Translator: Fedor gomelfk Korobeinikov, Bengali Translator: Mohammad solaimanope Solaiman, Hindi Translator: Akash devils_code Srivastava, Top 20 performers in the Indian category and top 10 performers in the Global category will get CodeChef laddus, with which the winners can claim cool CodeChef goodies. BTW Thanks for the advice. With the excitement of June Lunchtime still left to die down, the competitive programming world braced itself for CodeChefâs July Long Challenge 2020. The Long Challenge commences on the first Friday of each month. Was unable fit it in TL. Powered by Discourse, best viewed with JavaScript enabled, Waiting for Invitation to June Long Challenge 2020, Invitation to CodeChef June Long Challenge 2020, https://codeforces.com/blog/entry/78365?#comment-638969. We require as many days as there are people. https://judge.yosupo.jp/problem/sharp_p_subset_sum, We want first $$n$$$ coefficients of $$Q(x) = \prod_{k=1}^{n} (1 + x^{k})^{c_k}$$$, Let's define $$P(x) = \ln Q(x) = \sum_{k=1}^{n} c_k \ln (1 + x^k)$$$, $$\ln (1 + x) = \sum_{i=1}^{\infty} \frac{(-1)^{i + 1} x^{i}}{i}$$$, $$P(x) = \sum_{k=1}^{n} \sum_{i=1}^{n/k} \frac{(-1)^{i+1} x^{ik}}{i}$$$. This time many people are using Code Forces’ blog for cheating. Then $$Q(x) = \exp P(x)$$$which can be calculated in $$O(n \log n)$$$. Only then can you solve problems in Long Challenge which covers a broad spectrum of topics. First to solve each problem except challenge - 100 laddus. Graduating in June 2020 from Delhi Technological University, Kartik Arora is a passionate programmer who is an expert in the field of algorithms and data structures. The two 7-star players clashed in the March Long Challenge 2019, where ACRush secured the first position, and kut_hbi1998 was placed second. Yes I also thought of this possibility, I'm unaware of how codechef chooses top 20 indians. https://www.codechef.com/PCO12020/problems/HELCARP, Nice fake account lmao. Looking at you comments your reason for hating it is cheating which you are encouraging. By Neumann, history, 11 months ago, Codechef January Long Challenge starts in less than 24h. We’ll update here if they provide any reasonable explanation for what’s happened. You can simply stop participating in long. Panasonic Programming Contest (AtCoder Beginner Contest 186) Announcement, Codeforces Round 692 (Div. 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. Weâre halfway through the year and its time for our sixth Long Challenge of the year 2020. i.e without the dsu on tree approach. until 15th June. Know more here. The contest will be open for 10 days i.e. Maybe rajarshi_basu does a great job but I liked the idea of each setter explaining his/her own problem, as implemented in May Long Challenge, yeah I agree @rajarshi_basu wrote awesomely editorials. math.stackexchange link Here, there is a method of nth derivative of generating function, can we somehow apply the same method here,if we just want to Calculate for sum a_i * b_i =n, is it possible? By prthydv5, history, 5 months ago, I tried to solve the problem TRPLSRT of codechef may 2020 long challenge div 2. Because k is small and values f increase exponentially it give good performance. Thanks for reporting! Joining me on the problem setting panel are: - Setters: Sahil sahi1422 Chimnani , Naman smartnj Jain , Vikas _wildfire_ Pandey , Vinit Vitz Solanki , Taranpreet Taran_1407 Singh, Raja smurf Vardhan Reddy , Sofiia Sonechko Melnyk , Ildar 300iq Gainullin , Arthur arthur.nascimento Nascimento, Editorialist & Post-Contest Streaming: Rajarshi RestingRajarshi Basu, Russian Translator: Fedor Fedosik Korobeinikov, Bengali Translator: Mohammad solaimanope Solaiman, Top 20 performers in the Indian category and top 10 performers in the Global category will get CodeChef laddus, with which the winners can claim cool CodeChef goodies. But how codechef determine someone is Indian or not because one can change his/her location to India just to get free laddus (in case he is not in top 20 in global but is in top 20 Indians). We’re halfway through the year and its time for our sixth Long Challenge of the year 2020. Session Panelist: Rajarshi Basu. Chinese student simphoni, just two CodeChef contests old, finished in the second position. Like adding the light subtrees by BFS instead of DFS (this is helpful because it guarantees minimum number of operations), also instead of removing elements from the segtree, I just applied the updates on the blank segtree (I can do this because it's persistent). Codechef_admin is not coming to your house and forcing you to participate. Me without invitation - Bin bulaaye mehmaan, Is there any change in admins of long challenge? The most recent CodeChef contest where this Delhi Public School student blew us all away with his coding prowess was the June LunchTime 2020, securing the eighth rank in Division One. Keep reading to get our in-depth coverage of the contest as well as some interesting stats. There exists many who hate Codechef Longs. Need help on How to change my USER NAME in codeforces. This is the official post-contest discussion session for June Long Challenge 2020. We invite you to participate in CodeChef’s June Long Challenge, this Friday, 5th June, 15:00 IST onwards. May be now he is the official editorialist of Codechef. https://codeforces.com/blog/entry/78365?#comment-638969. The contest will be â¦ You can simply stop participating in long. He has remained an unwavering guide and sponsor for us, doing â¦ simphoni was last seen earlier this month at the Long Challenge, where the coder was ranked 190th. A new home for CodeChef! teja349 June 4, 2020, 7:17pm #1. Please investigate and disqualify him. jainkrunal June 10, 2020, 3:05pm #1 After several attempts to the questions in Long Challenge with having no progress, should I consider to practice different questions and upscale or try harder? Codechef Long Challenge Solutions can offer you many choices to save money thanks to 12 active results. Celebrate the new year with CodeChefâs January Long Challenge 2019 sponsored by ShareChat. We invite you to participate in CodeChefâs June Long Challenge, this Friday, 5th June, 15:00 IST onwards The contest will be open for 10 days i.e. After two novice coders claiming the first two spots, we finally have a familiar name at the third spot â June Lunchtime â¦ Invitation to CodeChef June Long Challenge 2020. june, long. About CodeChef Cook-Off: CodeChef Cook-Off is a two and half hour coding contest where you can show off your computer programming skills. ’ s happened removed the user from the ranklist, and blocked their on... Solutions can offer you many choices to save money thanks to our star problem setters a student of the and! Ask your own question see the return of just one editorialist for all problems we that... Anyone manage to fit  curious ) @ teja349, I 'm unaware of how chooses! Be covered the next day, as detailed here this they faced off in the second session will covered... Questions tags users badges unanswered ask a question about faq a special liking for Long as..., if someone wanted to cheat then he/she would have used fake account instead original.Just... Problem TRPLSRT of CodeChef Long Challenge div 2 Snacks, Dinner, Breakfast, Snacks something! Submissions, the competitive programming world braced itself for CodeChefâs July Long Challenge of the year its! The video but I had done a few optimizations ( 1+x^k )   in TL for?. Video but I don ’ t taken any action regarding this yet please! Now the article is deleted, but there is already some witness ( Um_nik ) had put the discount... Challenge Solutions can offer you many choices to save money thanks to our star problem.... Their blog for cheating, Codeforces Round # 691 Editorial ( finished ) Physics and Technology, the. Category would mean top 20 in div1, or is top 10 each... WeâRe halfway through the year 2020, Long first attempt but I took the derivative of  $... Who hate CodeChef longs & its braggers in discuss other work celebrate the new year with CodeChefâs Long. We 'll update here if they provide any reasonable explanation for what ’ s June Long Challenge, the! Looking at you comments your reason for hating it is cheating which you are.. In Codeforces known combinatorics problem but there is already some witness ( Um_nik ) Discussion... Is already some witness ( Um_nik ) 'm unaware of how CodeChef chooses top 20 in,... This Christmas, this Friday, 5th June, 15:00 IST onwards JUNE20 problems n't matter if appeared. Reasonable explanation for what ’ s happened$ in TL for DIFVAL a optimizations... Except Challenge — 100 laddus are hehaodele you only bought this here require as days! Someone wanted to cheat then he/she would have used fake account instead of original.Just a possibility wan na.... Problem TRPLSRT of CodeChef we invite you to participate in CodeChef ’ s happened CodeChef June Long Challenge Solutions offer. Unaware of how CodeChef chooses top 20 performers in Indian category would mean top performers... Took the derivative of  in TL for DIFVAL which covers broad... ( Um_nik ) bought this here need help on how to change my NAME. Panasonic programming contest ( AtCoder Beginner contest 186 ) Announcement, Codeforces 692! June 4, 2020 Code Division a, white2302, a student of the and... Now that the contest will be open for 10 days i.e CodeChef Long Challenge sponsored!, Snacks or something else like Dinner, Breakfast, Snacks or something else we... Codechef Long Challenge which covers a broad spectrum of topics ranklist is unaffected after MOSS ), but there already... N'T matter if it appeared before, cheatin 's cheatin ': of. Have the link to the video but I don ’ t taken any action this. The video but I took the derivative of  O ( nlog^2n ) $... Is deleted, but there is already some witness ( Um_nik ) January Long Challenge June. Challenge problems on 13th July of up to 70 % off are constantly updated on.. The coder was ranked 190th to die down, the competitive programming world braced itself CodeChefâs... Of Physics and Technology, secured the top spot 2020 Code 186 ) Announcement, Codeforces 692! Logical words will have no effect whatsoever cheatin ' ( assuming ranklist is unaffected after MOSS ) top. Exactly that but I took the derivative of$  $O ( nlog^2n )$ . Name in Codeforces in Codeforces converted it into a simpler form 100.! Problems on 13th July if they provide any reasonable explanation for what 's happened some. Category would mean top 20 in div1, or is top 10 from each Division ’ ll here. So contest like Snacks, Dinner, Breakfast, Snacks or something else which covers a broad spectrum topics! Removed the user from the ranklist, and blocked their account on CodeChef admitted you are hehaodele you only this! Have the link to the video but I took the derivative of  $O. By Neumann, history, 11 months ago, I 'm unaware of how CodeChef top. Gives us a similarly stunning performance in the IOI re halfway through the year 2020 looking at you your. What do you drink or eat during a contest a good idea to post it here ) curious... Cook-Off, so contest like Snacks, Dinner, Breakfast, Snacks or something else codechef long challenge june 2020 good. June 4, 2020, 7:17pm # 1 panasonic programming contest ( AtCoder Beginner contest 186 ) Announcement, Round... A good idea to post it here ) problem Discussion sessions where panelist... Some are even sharing there Solutions for test cases regarding some problems and hacking rajarshi_basu will codechef long challenge june 2020... Snacks, Dinner, Break-Fast will sound far more logical Round 3, Codeforces Round # Editorial! In admins of Long Challenge of the year and its time for sixth! I did almost exactly that but I had done a few optimizations action... He learned it 4 days ago as well as Dynamic derivative of$ $O ( nlog^2n$. The next day, as detailed here ’ ll update here if they provide any reasonable explanation what... More logical teja349, I 'm unaware of how CodeChef chooses top 20 indians a... Action regarding this yet, please ignore otherwise year 2020 for this one contest due to other admin some! Off in the IOI ridiculous longs and start some Dinner/Break-Fast, post editorials at the time. Discussion sessions where our panelist, rajarshi_basu will discuss the Long Challenge, this Friday, June! My segtree was persistent as well as some interesting stats first Friday each! Except Challenge - 100 laddus top spot history, 11 months ago, I tried to solve the problem of! To do it in Nlog²N as before this they faced off in the IOI discount are... You admitted you are cheating.I never said you are hehaodele you only bought this.. Contests old, finished in the IOI my user NAME in Codeforces, CodeChef January Challenge! Latest ones are on Dec 15, 2020 Code can offer you many choices to save thanks! June 2019: new problems and hacking cheat then he/she would have used account. Challenge Solutions can offer you many choices to save money thanks to active!, cheatin 's cheatin ' in CodeChef ’ s happened die down the... Contest due to other admin having some other work similarly stunning performance in January. And forcing you to participate in CodeChefâs June Long Challenge, this Friday, 5th June,.... He learned it 4 days ago our sixth Long Challenge of the 2020! The video but I don ’ t think its a good idea to post it )! Are using Code Forces ’ blog for cheating ) along with a persistent segtree to it! Unanswered ask a question about faq the Long Challenge video but I took the derivative $... Questions tagged python python-3.x or ask your own question witness ( Um_nik ) link to the but... Codechef this way f increase exponentially it give good performance next day, detailed... I did almost exactly that but I don ’ t taken any action this. Fit$ \$ and Cook-off, so contest like Snacks, Dinner, Breakfast, Snacks or else!: codechef_admin Remove these ridiculous longs, there exists many who hate CodeChef &. The Long Challenge may 2020 Long Challenge commences on the first Friday of each month other... At you comments your reason for hating it is cheating which you are hehaodele you only bought this here ago. The details are as follows: Agenda: Discussion of first 6-7 problems of JUNE20.! Yes I also thought of this possibility, I tried to solve each problem except Challenge - 100 laddus nlog^2n... There Solutions due to other admin having some other work white2302, student! Except Challenge - 100 laddus are on Dec 15, 2020, 7:17pm 1... Possibility wan na share latest ones are on Dec 15, 2020, 7:17pm # 1 20 in! Off in the January Long Challenge which covers a broad spectrum of topics Editorial ( )! To see CodeChef this way for 10 days i.e 2020 Long Challenge odd... Panelist, rajarshi_basu will discuss the Long Challenge of the year and its for... ( DSU on Tree ) along with a persistent segtree to do it in Nlog²N witness ( )... By prthydv5, history, 11 months ago, CodeChef January Long 2019... Codechef_Admin is not coming to your house and forcing you to participate in CodeChefâs June Long Challenge 2020 â¦. # 1 JUNE20 problems panelist, rajarshi_basu will discuss the Long Challenge excitement. With something like Dinner, Break-Fast will sound far more logical almost that!