Eg. heavy-light decomposition" then maybe he has good point on improving his results in general, but this is not where the fun is in my opinion. > I like Codeforces hacking more than TopCoder challenges.I definitely prefer TopCoder challenges rather than Codeforces hacks. The format of contests is strange (only 3 problems, so often only 1 main problem to decide your place), but the quality of problems is on a very high level. I can't speak much about the quality of their problems, because their site was almost unusable for me. It depends on what you are aiming for. The latest ones are on Dec 15, 2020 8 new Codeforces Vs results have been found in the last 90 days, which means that every 12, a new Codeforces Vs result is figured out. I’m Petar, a Senior Research Scientist at DeepMind. One minor issue is that at least last time I checked, you have to copy-paste your code in, not just upload a file. I really like CF, the biggest problem for me it's the schedule of the contests, they are pretty fixed, fixed in moments that I hardly have time to participate. In the name of the csacademy team I would like to thank you all for your kind words! Or perhaps, if conditions are right, it could potentially become a full-time job. Programming competitions and contests, programming community. (not in production) Tensorflow 3.11. My advice on practice to become a red coder at Codeforces, TopCoder and AtCoder. I think Codeforces should hire some people to write the editorial of every round not necessarily the writer of the contest so that at the end we have a good library for every problem on codeforces. "Competitors are mostly Indians and the judge performs very poorly." I know that codeforces team are working on new ideas every day. The problems on Project Euler suffer from the same flaw. However I like TopCoder challenges more than Codeforces hacks. This is where you get to compete with the best competitors from all over the world. This last round was an example, delayed start and low responses some times. Well, any decision should not make the community worse. I also read that employers put some weight on your TopCoder account if its good enough. This makes me feel more as a visitor than a member. I have never seen TopCoder handling 2200 participants, and you are saying they can handle it easily! Please correct me if you find anything wrong. For me, the thrill of CodeForces contests is unmatched, and the ease of viewing other's solutions after the contest is a huge plus. Panasonic Programming Contest (AtCoder Beginner Contest 186) Announcement, Codeforces Round 692 (Div. The site interface is clean. I think 2017-2018 season is unbeatable, at least for plat. A huge amount of your nerve cells die every time when you wait for a rating update on Codeforces. Note that packages marked as "not in production" means that while these models were used during the project, they are not present in the final codecoach.fun website. Some 250 pointers seem quite tricky and not — so — straightforward as well. The only programming contests Web 2.0 platform. Funny enough, I changed today to the Russian language and I noticed that some guys replied the same question I did to other guy in english but didn't set up the language correctly, so it was only being displayed in the Russian interface. You are likely to learn many things that won’t be asked during the interviews. http://www.codeforces.com/blog/entry/1197. I can't imagine doing CP and not visiting Codeforces regularly. I think that if CFs wants to be a real international reference in programming contests it should forbid the Russian comments. For Atcoder, I have not participated in many contests, but the problems I have seen have been excellent quality. r/cscareerquestions - Topcoder vs CodeChef vs Codeforces vs Project Euler etc. Contests are quite rare, at least the main ones (AGC). My target : Being red in TopCoder (or Codeforces also OK) before ACM-ICPC World Finals 2014. Hopefully it will help somebody to better prepare for the interviews at places like Google, Facebook, Amazon, and others: Overall, I'd prefer English-only comments. I think CFs is getting more stable but still behind TC. Need help on How to change my USER NAME in codeforces. CodeForces. [Beta] Harwest — Git wrap your submissions this Christmas! 'sorted(set(s))' in Python gets me a TLE! Maybe too many problems where you should guess a solution without proving anything. Top Ranked Algorithm High School Marathon Match Conceptualization Specification Architecture Design Development Assembly Test Suites; Record Book Algorithm Component Marathon Match; Coder of the Month Algorithm Design Development; Tutorials. APPS . I believe that they can add new features:). Solving any of the problems in the practice arena is difficult unless you already have knowledge of various algorithms. Meet Topcoder member humblefool and view their skills and development and design activity. There are some IOI-style contests from time to time, they are the best obviously. Please conduct more short contests on CSA. @ahmed..  dude when are u going to update ur tool for this codejam.. You are definately right about the first point. The biggest set of problem setters and thus the biggest variety of problems (I think). Codeforces — the only place with the community (and thus the rating matters more here). For beginners, Topcoder is not so nice, because especially in division one, one stupid mistake can make you fall down quite quickly. Codeforces Round #104 (Div. Codeforces Visualizer. They are too mathy. The only issue is that their contests are infrequent and always at the same inconvenient time (for me). 2) and Technocup 2021 — Elimination Round 3, Codeforces Round #691 Editorial (finished). Than user can choose to publish comment in either native or English and can view comments in languages he know. Good time zone for Europe. Topcoder — Let’s not talk about interface and usability and absurdness for a while :P The div 1 500 problems are mostly beautifully written. Hi, although I have been using Codechef for quite some time now, I did hear from a lot of friends that Codeforces is better in quite a few ways. [Beta] Harwest — Git wrap your submissions this Christmas! ", Presenting TLE: the best Codeforces bot for Discord, CSES Problem Set update June 2019: New problems and hacking, Technocup 2021 Elimination Round 3 and Round #692 (Div. The topics are close to atcoder, a bit forces by the input size limitation. The number of implementation problems is increasing and idea — based problems seem to be lost. The past few years have had higher consistent quality tho. I don't see why everyone can't make an effort to speak in english like in TC's forum, which works very fine. 1) A. AlexErofeev Then there is a possibility to write different things in different languages. Hackerrank, Hackerearth won’t be considered because they are not particularly trying to build contest platforms but rather focus more on getting people jobs, etc. Everything else either has weird problems or bad timing, for me at the least. In the initial revision of this post back in 2014, this particular website was somehow left out, but thanks to the nice community members in comments, we’ve now got an additional, and great, programming challenge site to add to our list. NASA Tournament Lab; Events; Statistics. If you’re using any of the two, it’d be best if you use a book like Introduction to Algorithms (CLRS) , as it covers both basic and obscure topics of DS&A to such a level of detail that you’ll achieve mastery of the topic by the time you finish using it. the last CEOI: http://codeforces.com/blog/entry/52986. Gennady Korotkevich (Belarusian: Генадзь Караткевіч, Hienadź Karatkievič, Russian: Геннадий Короткевич; born 25 September 1994) is a Belarusian competitive programmer who has won major international competitions since the age of 11, as well as numerous national competitions. Created with a view to connecting people to information, this list below contains a complete collection of all the fantastic resources I've collected over the course of my 11-year competitive programming career. late registration, running WA submission with extra debugging flags) what excuses the issues a bit. It allows you to Hide/Show problems' tags in an easier way (i.e. What do you drink or eat during a contest? Thanks for reply. I also recommend USACO problems. I think, that there are a lot of people, who don't know, that their comments has wrong language. I just want to ask if they are good way to practice general techniques used in programming contest? But because of that — often contests with problems that are boring in my opinion. 1. 2) Editorial, Invitation to CodeChef December Cook-Off 2020. Frequent contests and unfortunately quite frequent issues with the judge. That's at least my impression, I haven't competed in any of those for a while. I have corrected it in the comment. 1) Codeforces Round #104 (Div. Maybe an option to choose whether user wants to translate his comment without assistance or he wants site to translate it using google would do? The bronze/silver/gold levels are a great way to learn new topics if you are just beginning, and I have found the platinum problems challenging and interesting. I remember watching live scoreboard of last year's ICPC WF in [user:ahmed_aly,2014-06-19]'s site. Is the country responsible for preparing problems? I think it's not too difficult because there is much problems which cannot be given in CF-style contests(for example, the problems to the fact the "stuff" into time limit). We have the specialized UI designers, developers and testers you need to create and deploy an amazing digital experience. Images are used to explain more. Competitors are mostly Indians. 2) Editorial, Invitation to CodeChef December Cook-Off 2020. Sometimes I don't know if I should solve problems or read others codes. CSAcademy has very good problems. Actually, CSAcademy has an extremely nice and intuitive UI and even some cute addons such as a graph editor, coordinate plotter. In that site, beside the team's name, there are the TC handles of the team's members. I like to use the site code-drills.com to recommend problems, which only works with codeforces. Last year, I did attempt to participate in a SRM, but I met various difficulties. Recent topcoder failure was not because of number of participants. Freelancing is a great way of making some side income while still holding down your day job. Yeah , I like Topcoder's editorials very much. And TopCoder's website is super counterintuitive. I thought there is some committee. Topcoder is fine once you are familiar with the arena. AtCoder — by far the best problems 2. As much as I like tree and dp, those topics are a bit over saturated too. topcoder Networks. I like the combination of hacking and coding, on the contrary. There are many things to learn here, many people eager to join and write qualitative problems. Topcoder is really the best when it comes to problem ideas but I agree it's UI is very bad. You can get the best discount of up to 50% off. For all other platforms, the issue is that problems are often standard or boring. Compare max/min rating, number of contests participated, max positive rating change, max negative rating change, best position in contest, worst position in contest, number of total solved problem, levels of solved problems, category or tags of solved problems and many more. Actually I change my mind about the first sentence, most OI (and cf too) have increased on average quality quite a bit recentishly. This is most certainly not the case here.) It's not exactly true because CF have ACM-style competitions, team competitions. 1. Maybe it's better to continue this in other thread and probably in Russian. The new discount codes are constantly updated on Couponxoo. Codechef — The reason that most of the good competitors don’t compete on Codechef is quite obvious (I think). Codeforces. Still, I think TopCoder can handle 2200 participants easily but Codeforces seems to have problem to handle it. In topcoder I like separation of challenge phase and coding phase. Visualize, analyze and compare codeforces user profiles. If your predictions are correct then we need another strategy hehe. But usually its a good idea to skim through others solutions - lost 6-7 minutes worth 100-200 challenge points. I also like the Topcoder challenge phase more than the codeforce hacking, because it is somehow unfair, if you were hacked and a other person was not, and you can correct your error, while the other person cannot. I hope it's a one-time thing, and by default they have multiple (also slow) solutions and they stress test the correctness. Every single proof of every problem needed is found there even if the problem is simple enough. Python 2.7 2. 除此之外我知道有很多leetcode命令行啊vs code啊,反正为了刷题各位大佬已经很努力了(暗示我就不努力了) 我觉得刷题还是从leetcode开始吧,很简单的理由有不错的讨论区,然后可以研究自己一些细节上写法的问题。毕竟刷codeforces之类肯定不会注重具体实现了。 And also I like the match summary very much. If you prepare for IOI, don't focus on atcoder or topcoder. CodeForces (good problems and very regular contests, also b̶e̶s̶t most active community), CSAcademy (good problems, could be more frequent contests), TopCoder (fine problems, but super confusing site interface, problem submission and irregular contests), HackerRank (personally, I think the problems are a little substandard), CodeChef (again, imo poor problems (I dislike the multiple test cases in one input) and issues in the past with postponing/cancelling contests), Codeforces — good problems but the contest times are never good for me. I still recommend competing if you see a good problem setter. So I prefer CodeForces :x. My intention is to generate more comments using everyone's potential, not to take out the russian participation. I’m working on a project this year to build a competitive programming FAQ. thesilentnoise October 4, 2016, 10:19am #6. Interface looks a little clumsy at first but is actually good once you get used to it. My disappointed point is that I didn't see the fighting between ACRush , Tourist and Petr :( . At the moment there are only 2 active people on CSA. USACO problems, particularly older ones by only a few years, are not the best as far as OI goes, at least on average, though there are def some nice gems. Still def worth someone's time tho. Use our talent for just one part or for the entire product creation. Regarding quality of problems in my opinion: 0. (Lot of people participating on atcoder and codechef are Japanese and Indians respectively. Menu. 1, Div. topcoder open semifinals - Egor (10 minutes delay) Codeforces : Problems are of very good quality ( learnt many new concepts , Editorials are awesome, Hackings, Competitions ..), Topcoder : Learnt different varieties of problems on single concept. Freelancing. The only programming contests Web 2.0 platform, But, In Codeforces Contests can't cheat. Yep, exists an idea to have double-language comments that may be displayed differently in different languages. TopCoder can handle 2200 participants pretty easily I believe. Petya loves lucky numbers very much. Programming competitions and contests, programming community. How are the two statements related? 1, Div. 1- Codeforces contests now are more stable than TopCoder contests, there were about 2200 registrants today (not all of them participated) and the contest ran smoothly (at least for me). You can also see wins and tenure with Topcoder. Codeforces is improved constantly (e.g. Arguments against topcoder is that the interface is difficult, but navigating difficult algorithmic problem is just like navigating the difficult interface anyways. 'sorted(set(s))' in Python gets me a TLE. Atcoder — Despite of a lot of contests the problem quality of atcoder doesn’t even seem to flinch a little. Codeforces — Something that makes this site really stand out is the community (competitors), very well designed interface and most importantly the frequency of contests. 21 votes and 8 comments so far on Reddit. I compete there every time I'm able to. Like many of my friends, I started to really participate in online rounds since 2018, and Topcoder's fame already seemed to fade. CSAcademy is better than CodeForces except that it has less users. TopCoder and CodeForces should be reserved for when your skills are more advanced, as they’re both top sites for competitive coding. :D. I love TC and I love CF. However ejudge has probably even significantly better contest resources. GYM. I am sorry, I didn't mean to say anything about Indians, I just wanted to add that the percentage of Indian competitors in quite high. 3- Codeforces now makes much more contests than TopCoder. Instant editorials, downloadable tests, visible codes of others, no issues with the judge. which is in fact a good thing in my opinion. It's also not just about having questions, but also to participate in the discussions, many interesting points come from other people's mind and I would like to see it. I also appreciate more time and more tasks in Codeforces than in TopCoder. TopCoder 3./4. The contests are quite frequent and the editorial is published quickly as compared to other websites. Does anyone know how it works? After correctly setting it up you will realize other challenges are so miniscule compared to this. Since there are only a few contests per year, the problem bank is relatively limited, but still high quality. Sometimes the judge performs poorly. Server time: Nov/18/2020 03:00:30 (g1). But we hope that you'll enjoy our contest in the future as well! Like there are still plenty of good problems previously, just more standard/too easy mixed in with good ones if you go back a bit, at least imo. On September 20, 2008, Petr Mitrichev took part in a Topcoder Spotlight Session where he answered […] It would be great if CF has forums properly structured. It took a long time to even load a single problem, the ui is very poorly designed imo (very small vertical space to write code), and I disliked how they wanted you to write your solution (seems more geared toward Java users). Codeforces Vs Overview. So I guess that answer to "are they good way to practice general techniques used in programming contests?" Csacademy — A relatively new contest platform, problems are good but the frequency of contest is just too low as compared to other judges. I also learnt most important techniques through USACO problems. E.g. Codeforces/CSAcademy I don't participate in contests on other websites. If someone likes to say "this is a programming contest, not an algorithmic one" or "I don't get why people don't learn SSE these days which is more useful than e.g. The Application of Lagrange Interpolation in Mathematics. Typical medium/hard problem from AtCoder requires much more thinking and less code than typical medium/hard problems from other sites, so if someone's goal is to have fun by solving problems requiring thinking then it is the best site. I'm glad others share my frustrations with TopCoder. 4- I like Codeforces problems quality and difficulty levels more than TopCoder. And BTW, I like TopCoder challenges much more than Coderforces challenges. Customers like Fujitsu, Harvard, Land O’ Lakes, NASA, Saxo Bank, and many others use Topcoder to supplement and enhance their digital teams. Polygon. (answer) I’m doing most of my writing on Quora this year. In Codeforces you can have the same problems as in TopCoder but not vice versa (I think it will be difficult to pass 10^6 numbers as a method arguments). I Enjoy both Topcoder and Codeforces but this point goes to Topcoder. Lucky Conversion . The only programming contests Web 2.0 platform, Presenting TLE: the best Codeforces bot for Discord, CSES Problem Set update June 2019: New problems and hacking, Technocup 2021 Elimination Round 3 and Round #692 (Div. TopCoder algorithm contests are a way to develop your coding speed. But, In Codeforces Contests can't cheat. To read the whole series, see my CPFAQ category page. I feel sad when I see Chinese comments (especially with a lot of "+" — clearly there is something clever/funny, but I just can't read it). Isn't that true? But it's unrated. Atcoder — superb quality of problems that require thinking more than implementing. For me, it would be exellent if codeforces added to the tab "ACM-style contest", and sometimes given to ACM-style contest. I still prefer the TC challenges than the Hacks here, exactly because as other people said it's not fair to some people have the lucky of getting hacked and correct their solutions. Or simply count comment as english if it hasn't any russian character. I don't think that Codeforces is much better than Topcoder, so i'm going to argue. And TopCoder's website is super counterintuitive. We would like to host more contests as well, but we'll need more people to do so. Egor Having an ability to choose a language for reading/writing comments would lead to language-specific threads (for good or bad). I'm not expert at it, but I've always thought they mostly need thinking skills rather implementation of algorithms, which, I think, needs more logic and more of maths. I also agree the site is stable, especially recently, despite the increased number of participants. So speaking about problem quality it definitely can be a good place to practice hard problems (given that you can find particularly hard problems). I know it's much more comfortable to speak in the home language, but It's very annoying to see like 80 comments in the Russian version, possibly containing interesting things and solutions in contrast to 4-5 in English. And I'd like to see a list of all problems with upsolved ones being marked green or sth. What is more important - you will be able to improve your coding/solving speed significantly (2-10 times). Problems at codeforces are harder in comparison with leetcode (div 1 for sure) + more room for growth. POJ ZOJ UVALive SGU URAL HUST SPOJ HDU HYSBZ UVA CodeForces Z-Trening Aizu LightOJ UESTC NBUT FZU CSU SCU ACdream CodeChef CF::Gym OpenJudge Kattis HihoCoder HIT HRBUST EIJudge AtCoder HackerRank 51Nod TopCoder E-Olymp 计蒜客 LibreOJ UniversalOJ Of course we are comparing TopCoder Algorithm section. Programming competitions and contests, programming community. PostgreSQL 9.6.3 3. Codeforces GYM is quite helpful training resource for teams. I always assumed that the host country is somehow responsible for the selection of the tasks. Maybe I have this feeling because CF hosts more contests than other platforms, it's hard to say. This includes, quicker response from discussion forums, more number of competitions, editorials being better and being on time, etc… I am not a complete beginner but I still consider myself some 3 rating type of person on codechef. However Codeforces has by far the best website, there is community here which is nonexistent elsewhere (because of blogs) and great contest resources in gym. 1 + Div. For Hackerearth, I will say this site helped me learn some data structures even though it's not really geared towards contests, as they often have tutorials and some straightforward implementation problems to help you practice what you just learned. Besides that, I really appreciate all the work of CFs, the quality of the problems are very good, and it's also amazing to have more opportunities to traine and have fun. There is no way to interact with the community but most of the after — contest discussions (no matter what online judge) are carried out on Codeforces anyway. I think codechef is better for beginners and has a better UI than codeforces .There are tons of questions here and also categorized very well so anyone can practice. Jupyter (for running notebooks) 3.9. Desktop version, switch to mobile version. codeforces vs leetcode. Possibly I'm not clever enough but participating in SRM is indeed much complicated than participating a Codeforces Round. It would be interesting to have a small checking function to avoid this human error. I didn't get you. For more information, see A Project for 2020. Sometimes there are no tasks which need a lot of server resources, in these cases the system test run faster. 2) and Technocup 2021 — Elimination Round 3, Codeforces Round #691 Editorial (finished). I checked last few AtCoder contest and their problems seems like brain teaser with constructive and ad-hoc solutions. Competitive programming sites and interview preparation sites have a lot in common, but they aren’t interchangeable: Is TopCoder the best place to practice coding interview questions? 1 + Div. And if people from Japan will prepare problems, it means one should solve old Japanese national olympiads, that's for sure. While in TopCoder SRM can create an extra account. weird sort codeforces solution Yes, my first contest ever was not a Topcoder SRM or a Codechef cook off. Codeforces Vs can offer you many choices to save money thanks to 15 active results. SGU online judge and Timus online judge are specifically known for their problem quality so you can practice there if you want quality problems. Among the platforms, CF, CSAcademy and Codechef should be fine. This is one in a series of articles describing the research, writing, and tool creation process. Awesome Competitive Programming . What do you drink or eat during a contest? If you have some questions - ask. On one hand, Codeforces is a social network dedicated to programming and programming contests. Codeforces. (not in production) eli5 3.13. Codeforces is all about daily/weekly challenges. (not in production) Statsmodels 3.12. If you can't solve the next problem, you can attempt hacks on those you've already solved, rather than wait for the next phase. Flask 3.7. psycopg2 3.8. Topcoder vs CodeChef vs Codeforces vs Project Euler etc. I have a PhD in Computer Science from the University of Cambridge (Trinity College), obtained under the supervision of Pietro Liò. December 11, 2020 December 11, 2020 Uncategorized Leave a comment December 11, 2020 Uncategorized Leave a comment I noticed that a Hackathon had an option to link to ones CodeChef account. Python packages: 3.1. numpy 3.2. scipy 3.3. pandas 3.4. sklearn 3.5. where I waited a long time without answer. But CF is slightly winning so far. Aren't ioi-style problems considered to be more mathy? One thing that bothers me is the option of comments in Russian. bciobanu and myself. Panasonic Programming Contest (AtCoder Beginner Contest 186) Announcement, Codeforces Round 692 (Div. If you forbid russian comments you will get probably abount 10% of that comments posted in English (and other just not posted) and about -30% to number of users ;), But it would be nice for user to specify his native language and know languages. Hi r/leetcode.I am an ex-Google software engineer, and I wrote down almost everything I know about interview preparation, and launched a small website. Codeforces have more problems, some of them are really challenging. And I think many people feel the same way when seeing Russian comments. The Application of Lagrange Interpolation in Mathematics. A curated list of awesome Competitive Programming, Algorithm and Data Structure resources..