ecnerwala's blog

By ecnerwala, history, 2 years ago, In English

Hi everyone!

code_warrior recently asked "How is ecnerwala?" I'm here to answer that question and others you may have! I'll check this regularly for the next couple of days and try to respond when I get a chance. Ask me anything!

To code_warrior: I'm doing good. Quarantine is still ongoing, so I'm spending most of my time at home with my family, coding both for work and for fun. How about you?

EDIT: There have been a lot of repeat questions, and I've tried to answer each question at least once. I've given a bunch of general advice about practicing and training, and I don't think I can say too much about how you specifically should practice, so I might not answer all of those questions. In general, practice things that you see in contest that are medium or hard but not impossible for you.

UPDATE: Thank you guys for all your questions! I think I'm done answering questions for now, hope to compete with you guys more!

UPDATE 2: I finally followed through and posted a bunch of screencasts to my YouTube channel, check them out if you're interested! I'll look into a way to post the code/key-captures, and I hope to publish some with commentary soon!

 
 
 
 
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2 years ago, # |
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How tall is ecnerwala?

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    I swear I'm pretty much 6ft (1.83m).

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      Everybody asks How is ecnerwala ?

      Nobody asks How is alawerence ...

      S E D
      L Y F

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        2 years ago, # ^ |
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        how to become lgm in 3 months?

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          2 years ago, # ^ |
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          If someone could have achieved it in 3 months then it would not have been called "Legendary". P.S I am none to tell you(I am a fkin newbie) this but I think these people must be very passionate about CC.

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        2 years ago, # ^ |
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        Because he doesn't mess up the spelling of his own handle

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Do you know who is "BINOD"?

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What is your favourite editor??

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Hey, the question hasn't been answered yet, so I'm asking it again.

How are you, Andrew?

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    2 years ago, # ^ |
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    I'm doing good, how about you?

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      Not so good, but I'm glad to hear you are doing well.

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      Hello Sir, it's nice to be able to chat with you. Regarding the Code Jam Finals, I would like to know that don't u feel sad after losing to Tourist? Especially after working so hard for so many years? I ask this because I get disheartened too easily by failures. I also face a dilemma like how much time I should spend behind thinking about a problem..

      Next Question is, what should be my strategy to prepare as a team for ICPC?

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        2 years ago, # ^ |
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        I would like to know from the community as to why this simple post has been downvoted so many times.Neither have I tried to insult anyone,nor am i asking anything irrelevant.Then why unncessarily are you downvoting me?

        I would really like to know the reason so that in future I keep certain things in kind before commenting here at Codeforces

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          2 years ago, # ^ |
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          The only fault of yours is that you are a newbie. People are fkin ratist here. come btches downvote this.

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            2 years ago, # ^ |
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            Thanks for your concern. I shall keep this in mind

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          2 years ago, # ^ |
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          Your first question is a rather sensitive, and a bit personal question.

          Well your second question can be answered with some searches on the internet. It's also a part of the strategy a team uses for the competitions. If you still want to ask such things, create a blog.

          "Ratism" has nothing to do here.

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        2 years ago, # ^ |
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        I personally down-voted you for this line `

        See it

        `

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2 years ago, # |
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My ex-wife sent me the bill for the dog tax. I say hey this is your dog. She says, well, it's a breakup dog. What should I do?

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what kind of "work" do you do?

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    I work at a startup called Impira in SF on database-like systems to extract and query information from assets (like scanned documents) using machine learning. I'm mostly working on the low-level data storage layer to store data and make it efficient to query.

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      Why did you choose to work in a startup particularly? Given that you have excellent engineering background and exceptional programming skills .

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        Startups are usually where the most exciting work happens. They need to master the market in some new vertical and that takes hardcore programming/engineering skills. Though this may vary from startup to startup.

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      23 months ago, # ^ |
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      Do you have enough time working in parallel while studying at MIT?

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What's your next big goal?

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    One goal I have is to start streaming or screencasting more competitive programming content. I'll be posting some screencasts (probably AGC047 and CF R663 Div2) to YouTube shortly, and make sure to follow me at https://twitch.tv/ecnerwala to see when I go live!

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What is your training routine to get better?

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    Recently, I haven't had much of a strict training routine; I mostly do programming problems when I feel like it (which admittedly is pretty often). I do try to upsolve most of the problems from all the contests I do, but even then I skip annoying/"uninteresting" problems.

    In high school, I did a lot of POI (Polish) problems.

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      what did you do when you were stuck in some POI problem and tried enough (as there's no editorial) and what should the others do now ( considering the resources available today if any )?

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        2 years ago, # ^ |
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        there are editorials in polish with reference solutions

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          By no editorial I meant english editorial actually

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What does "ecnerwala" mean? And how do you pronounce it?

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    2 years ago, # ^ |
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    Well I can answer this : D it's the reverse of his last name

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    It's the reverse of my middle name (my full name is Andrew Lawrence He). I pronounce it like "eck" (hard-k) — "nerwhal" (rhymes with narwhal) — "ah".

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      2 years ago, # ^ |
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      Omg, I just realized that I was reading your handle as "echerwala" all this time.

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        Omg, I just realized that I was reading his handle as "encerwala" all this time.

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          anybody who read it like e-c-ner-wala ?

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      2 years ago, # ^ |
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      /ɪkˈnɝːwələ/

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    I wish I knew.

    def p(x):print(x,flush=True);a[int(input())-1]+=x
    a=[*map(int,input().split())];print('First');p(10**9);p(max(a)*3-sum(a));p(max(a)-min(a)>>1)
    
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Time for some cliche questions
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    I think most of improving is practicing implementing and building familiarity with concepts. It's hard to say what difficulty level problem. I think to practice implementing, try to implement something that complicated enough that you'll make bugs, and then try to build muscle memory or other techniques to avoid those bugs. To learn concepts, probably try to solve problems that take you between 20 minutes and a few hours to solve.

    Also, reaching purple may not be the right goal; you'll probably want to set a short-term goals that are more incremental.

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you are a legendary coder ....i think you get many offer from Google/Facebook or many big tech company's share some interesting idea about that ....

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    2 years ago, # ^ |
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    I don't have too much to say about that; there are a lot of resources online if you want to learn about these things. I will say that competitive programming problems are pretty similar to the programming problems I've seen in interviews, so it's definitely a helpful bit of experience to have.

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Q1. can ecnerwala defeat tourist in google code jam finals ?

Q2. is ecnerwala belongs to china or any background history with china ?

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    1. Still unknown. I can beat him in Distributed CodeJam Finals though!
    2. My parents grew up in China, but I was born and raised in the US.
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where do you live Legendary Grandmaster?

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What do your cp practicing sessions look like? How do you work on problems (stuff like thinking for >30 mins, reading editorial afterwards, then implementing stuff)? Especially your practicing sessions at times when you were mostly active.

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    Yeah that's pretty much right. I'll think for a while, especially if I feel like I'm still making progress. At some point, if I'm stuck or I no longer want to work on the problem (or at the end of the contest), I'll read the editorial or discuss the problem. I think it's important to go back and make sure you actually understand the structures of the solution and how they do and don't generalize. (How things don't generalize is a great way to understand what underlying structure is being relied upon.)

    Then I usually try to implement it unless it's particularly uninteresting and annoying.

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Which things you like and dislike most in your professional life?

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    I really like being able to learn things from coworkers with experience in different areas than me. One thing that's a lot harder than competitive programming is that the codebases are larger and have to support a lot more collaboration, via things like good design patterns and good testing.

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huge number of easy questions or few number of hard questions? Which is better for practice? And do you think solving math problems and normal puzzles help in any way?

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    Probably a mix of many medium questions and some hard questions. I started off doing math olympiads, and I think they helped both understanding concepts and improving problem solving.

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how old are you, from when you started coding?

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Do you eat pineapple on pizza?

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    It's not my favorite topping or anything, but it's tasty, sure.

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How to be a legend like you?

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I love you....Do you love me?

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Favorite moment in a programming contest?

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    My favorite moment was probably solving towns at IOI 2015 in the last 15 minutes of the contest. That problem is so nice, and clutching it out felt so great.

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What is your favorite programming competition?

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Apart from Competitive Programming , what are your areas of interest(hobbies)?

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    Recently, I've just been playing some video games like Celeste and doing some puzzle hunts.

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Likelihood of me featuring in a Lockout dual vs tourist?

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Do you have girlfriend if not any ex ?

And whats your age btw ?

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Do you find software engineering to be interesting in general? Asking because the thinking involved is very different from algorithmic thinking.

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    For sure. I actually really like the parts of competitive programming that are more like software engineering, like designing good interfaces and abstractions. I think that's one of the things that makes me pretty good at technical problems.

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hi

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How do you prepare your team for ACM ICPC?

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    For ICPC 2019, we did several contest each week and spent a good amoout of our own time upsolving problems too.

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According to you what is your biggest achievement so far?

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    It's probably winning Distributed Codejam, or 2nd place at ICPC.

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Any lockout planned for the near future? Have you watched Errichto's recent lockout? If you hold a lockout in the near future could you incorprate the problem explaining like Errichto did in his lockout?

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    I'll probably try to do some lockout soon, but no guarantees for now. I haven't actually watched Errichto's stream, but that does sound like a good idea; I'll check it out when I get some free time.

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You seem to be extremely proficient in C++. How long have you been using C++ and what are you favorite programming languages ?

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    I've been using C++ since 2013. My favorite programming languages are probably C/C++, Go, Python, and maybe Rust (I haven't actually used Rust much though). I think Typescript is pretty cool, but I haven't used it much (also npm scares me).

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Do u have girlfriend?

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Can anyone become an LGM?

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    2 years ago, # ^ |
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    This is a very good question... Why are there so many down votes?

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      There are 30 slots, and 30000 ppl trying. I think most ppl know the answer.

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        2 years ago, # ^ |
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        I think ratatouille said it best: "Not everyone can become a great artist... but a great artist can come from anywhere." -Anton Ego

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          Not everyone can become a great artist...

          Doesn't that quote prove my point? The second part is true but doesn't detract from the first statement.

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            2 years ago, # ^ |
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            Ya, I was agreeing with you.

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Q1. What is your thought process when you are not able to do good in contest?

Q2. What is the best way to learn new topic and practice and from where?

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    1. I think you just have to keep pushing to do better; it's good to reflect a little on what changes you could make to do better in the future and then just move on to the next contest.

    2. Depends on the topic, probably just read about it and make sure to practice on problems.

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Do you like monkeys?

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    i like you.

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    6/10

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    I think once you go back to MIT you will pay for it my dear friend... because ecnerwala knows all professor of MIT so the will give you less marks in semester exams..

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Did you practice on some other site before starting off with codeforces? Also if you don't know a particular concept where do you read stuff about it ?

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    I started off mostly with Codeforces and USACO training (both the training pages and past USACO problems).

    To read about concepts, it depends on the concept; sometimes there are good resources on blogs like CF, other times you just have to read papers (which sucks). Asking peers for help is also good.

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How to I tackle the frustration in competitive programming .Thanks in advance.

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milk first or cereal first?

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which university in {USA / California} is best for {computer science/computer engineering} ?

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Did you have the opportunity to stay in academia, and if so what made you want to go into industry?

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    I really like building things, and there's a lot more opportunity to do that in industry.

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How soon after reading the problem would you recommend seeing the editorial ?

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    Probably after you've stopped making progress, and at least 10-20 mins.

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It was at this moment he knew, HE FUCKED UP!

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What did you study in Uni? Did you do any research?

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    I studied CS at MIT, I did a little research but not much.

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have you ever thought of giving up cp or took a long break?out of frustration or maybe your contest performance was disappointing to you at some point or for any other reason.

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    I've taken a couple breaks (see ~2017), mostly because I lost interest or had other things to do.

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Who killed Kennedy?

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How popular do you think you are compared to tourist and Errichto?

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.

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Few of my questions:

  1. Do you workout?
  2. Do you watch animes?
  3. Tea or coffee?
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    1. I don't really workout, though I keep saying I should :(
    2. Not really, I've watched parts of a couple but I wouldn't call myself a big anime person.
    3. Tea, but I can't really take the caffeine from either.
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Would you tell us your programming experience from beginner to advanced and how to improve ourself

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What one thing you would like to achieve regarding competitive programming?

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I generally am stuck on problems related to divide and conquer.Do you know any good resources to study divide and conquer algorithms from?

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How do you manage time for both job and CP?

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    I have enough time for both; I don't spend all that much time on CP.

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What is your industrial skill . I mean , what you are, a Teacher ,a webdev ,software engineer, ML/AI engineer, etc. ??

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Where you see yourself after 5 years from now ?

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what do you love and hate the most about life?

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What are you doing for entertainment (without coding ) like tv/movie/song ??

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    I've started watching some more TV, mostly police procedurals like Person of Interest, White Collar, etc.

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When next will we see a round organised by you ??

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Why should we hire you for this job?

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Do u love pizza??

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Do u also struggled initially to solve Div2d,div2E??

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    LGMs dont struggle with div2 Ds

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      read my question carefully,i have written "initially".

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        They dont struggle (ever).Its trivial for them from the beginning

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    Yeah for sure, I mean there was a time when I didn't know BFS.

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How can I be a Legendary Grandmaster like you ? How do I learn new things ? Where to start ?Which would be better for me, Codeforces or UVA ?

How do you do, now?How old are you?

Thanks.

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Do you play any video games?

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    2 years ago, # ^ |
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    Some, I've been playing Celeste, some Super Smash Bros. Melee, and I've recently tried playing Dead Cells.

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    2 years ago, # ^ |
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    Let's Say we currently have $$$i$$$ stones, then $$$\forall\; p_k \in P$$$, if $$$i-p$$$ was a losing state, then $$$i$$$ is a winning state.

    For Example if $$$i = 0$$$ then, $$$p$$$ is a winning state since $$$0$$$ is a losing state. Hence the following recurrence holds,

    Spoiler

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What competitive programming site do you love the most? Is it codeforces or something else?

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With whom do you enjoy solving in a team more scott_wu or ksun48 if you were to choose only one ?

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What does it take to get 5.0 GPA in BS Math and computer science at MIT ( because you scored 5.0 )

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2 years ago, # |
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I feel like, I'm stuck in cp in one point, can you suggest me, how can i reach cf 1900+? or what should i follow?

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ecnerwala i used to use vectors but because of some serious tle problems i stopped. And it’s really hard to use arrays instead of them. How do you use vectors and handle tle cases?

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    2 years ago, # ^ |
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    It happens rarely that you go into TLE issues with vector. Maybe you don't know how to use them properly.

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      2 years ago, # ^ |
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      Actually it was rarely but in really serious cases. Once in code jam problem and once in a usaco problem. I was afraid of it happening in the contests so I stopped it. Also It has happened in one of tourist streams which made him the runner up instead of the winner...

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    2 years ago, # ^ |
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    Don't use .push_back()if you know the size of the array or at least .reserve() some memory at first. Other differences are minor.

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    2 years ago, # ^ |
      Vote: I like it +3 Vote: I do not like it

    Yeah, vectors shouldn't have much problems unless you allocate/deallocate them frequently. I try to always reserve(sz) to avoid log(n) resizes, and also try to preallocate large vectors outside loops.

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2 years ago, # |
  Vote: I like it +5 Vote: I do not like it

My girlfriend left me. I called her. After an hour of argument, she agreed to come back only if I become an expert in a month. I am confused and sad. Bitch took my earphones too.

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    2 years ago, # ^ |
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    Maybe i can help you with that? what do you think?

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    2 years ago, # ^ |
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    Can you please share her details in dm if she doesnt mind? I know someone who can become expert in a month if mike increases frequency of div1s.

    Don't forget to take person's explicit consent before sharing his/her details.

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      2 years ago, # ^ |
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      Do you mean fall to expert from purple+?

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      2 years ago, # ^ |
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      Hum Indians jitna bhi tarraki karle, dil se hamesha harami rahenge XD

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    2 years ago, # ^ |
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    Is she already a Candidate master or Master? LOL

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    2 years ago, # ^ |
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    If her intention is to help you grow, work your ass off. Else text her 'blue?' when you're red.

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    2 years ago, # ^ |
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    I hope not all girls are like that, if so, then I am never getting a girlfriend.

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Why is ecnerwala?

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what the hell?

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Is coronavirus a hoax made up by flat earthers?

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What are frogs?

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How hard did you work to maintain your perfect 5.0 GPA? Also, considering you didn't pursue academia, why did you go through so much effort to maintain a perfect GPA?

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    2 years ago, # ^ |
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    I didn't maintain a perfect GPA. I did well in classes because I chose classes that were interesting and I wanted to learn from.

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      2 years ago, # ^ |
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      Wow, amazing! I envy such passion!

      I can't help but think of classes as a chore :(

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What brought CP to you?

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How transferrable is CP to real programming? Do you use a lot of skills that you learned in CP during work?

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    Yeah I think there's a decent amount transferred, particularly about writing clean/testable/bugfree code.

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When you were at the beginning stage of learning CP, how did you spend time for different topics (DP, graph, math...) and what were your ways to maximize the productivity in the decided time spent?

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    2 years ago, # ^ |
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    I didn't really split my time by topic too much after learning the basics in each.

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Bro, I want to ask u about a coding question which was recently asked by D.E.shaw company as part of recruitment in india. I don't remember the exact question but i will tell u the outline. which was : In the question there is a girl and she had to cross a series of land mines ,she cannot step on consecutive land mines but she can skip any number of land mines ,if she steps on a land mine then she loses a certain score. For each land mine there is certain integer denoting the score she loses on stepping that landmine.if she steps on more than one land mines then she loses score which is the sum of those corresponding integers .

inputs are: n-number of land mines array of n integers denotes scores which she loses on corresponding land mine we need to output a single integer which is the minimum score she will lose example: 5 8 1 4 6 9 ans: 1+6=7

I am so confused on seeing the question then I did it by summing up of odd indexed and even indexed numbers and printed the minimum of them but using this approach I am able to pass only 4 testcases out of 13

please help me in solving this and also if there are any similar questions please let me know

Thank you.

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What happened between 2016 and 2018?

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    2 years ago, # ^ |
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    Life

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    2 years ago, # ^ |
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    2017, duh

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    2 years ago, # ^ |
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    Yeah, I took a bit of a hiatus to do other things; CF rounds conflicted with classes, and there were other things I wanted to do.

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your favourite sport other than competitive programming

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    I played a bit of Ultimate in college. I don't watch sports much, but if I had to choose, it would be basketball or hockey.

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Your are a legendary grand-master. You spent a lot of time in cp. Do you think that you sould have been spent slightly less time in cp and do "something else" ? If so what is that "something else"?

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    I do CP mostly as a hobby now, so I don't really regret spending too much time on it. If there are other things I want to do, I do those other things as well.

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What job do you do ? At what age have you started coding?

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are you a coffee person? or tea?

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Did you/do you do competitive math too? I vaguely recall seeing you in some of Evan Chen's streams.

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is working keep any effect on cp??

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do you have an Android or IOS smartphone ? which OS do you have in your computer ?

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    I have an Android phone (LG G7) and I run linux.

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Any suggestions for a beginner/pupil like me for CP.Thanks In Advance

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What do you do when you get bore with problem-solving? How do you refresh your mind!

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  • What was your usual routine at MIT?

  • How did you manage your time between competitive programming and college work?

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    2 years ago, # ^ |
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    My usual routine at MIT was pretty standard; go to classes, do homework, socialize, etc.

    I didn't really split my time between cp and college; see the break I took in 2017.

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What is the point of doing cp professionally?

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    I don't do it professionally, it's mostly a hobby for me.

    I think if people do go pro, it would mostly just like any other esport.

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Wish me good luck for my first appearance of Div 1 contest.

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How did you start competitive programming? Do you have any tips for beginners?

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Practice strategy for beginners?

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You're just 22. Are you the youngest Legendary Grandmaster?

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  1. What does ecnerwala mean?
  2. How many girlfrineds?
  3. Other hobbies except CP?
  4. If ecnerwala didn't choose to be a competitive programmer, what would he have done?
  5. Atcoder vs Codeforces?
  6. How to improve? I am practicing but my rating decreases.
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how did you think of the idea of putting your name in reverse? it looks so cool!

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What is your favorite show?

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    2 years ago, # ^ |
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    I really like the first few seasons of White Collar.

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It seems like you really love lambda expressions, any particular reason why?

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    2 years ago, # ^ |
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    I just hate globals. Also, you can define lambdas near where you use them so that the control flow is still obvious.

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      2 years ago, # ^ |
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      Is the Y combinator+lambda as efficient as an explicit recursive function?

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        I think it's essentially just as good, though I haven't done any benchmarking. The assembly does get inlined the way you want.

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          23 months ago, # ^ |
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          I learnt using lambda functions from your submissions, and this is how I decreased the runtime for the first problem I solved using it:

          529ms : 90710626

          451ms : 90711407

          the dfs() needed a vacant priority_queue for every test case and I didn't know any better way!!!

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From Where do you learn new algorithms?

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    Other people mostly, sometimes papers or blog posts.

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who is binod man??

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What do you usually do when you are free ? Or you are always busy ? :D

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Challenge: Solve your next contest problems in python only

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    Naw, I don't want to deal with fast-Python-io and stuff.

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Why you don't have an avatar on Codeforces?

Also: if you could only solve problems from one of these platforms: Codeforces, Atcoder, or Topcoder, then which one would you choose and why?

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    2 years ago, # ^ |
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    Too lazy to set one, I guess I'm not photogenic enough.

    I'd probably choose CF, mostly for volume.

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      2 years ago, # ^ |
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      Do you have a mirror then?

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        2 years ago, # ^ |
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        ecnerwala proceeding to set a mirror as his avatar

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How were u introduced to CP and what year :).

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Please advice on how to practice CP.

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i am a first year B.Tech student . Just wanted to ask how to become good on codeforces

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Are you ecnerwala?

...it's ask me anything after all.

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Is ecnerwala interested in starting a startup?

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Are birds real?

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Can you be my mentor for competitive programming?

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How to be able to think CP questions in free time(like pooping or bathing). I don't have enough time for practicing. This semester's like hell. Not even a single hour to study. Sme tips on how to manage time for CP?

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    2 years ago, # ^ |
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    It definitely sucks to be super busy, there's not really any CP-specific time-management tricks I have. You just have to prioritize and make sure you're efficient with your time.

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(1) is it better to build observation skill (by solving tons of constructive algo tagged problem ) first then go for complex algorithm or Simultaneously practice ? (2) currently my practice is only cf based due to good editorial or should i practice from different different oj ? (3) im not participating contest for last 3 months due to rating oriented , my goal is to solve as much as quality problems . is it good approach ?

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How do you feel having to get up in the morning at 730 and giving a contest? Does it get you all set for the day?

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    2 years ago, # ^ |
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    7:30 is pretty early, so it kinda sucks (could be worse though: AtCoder is at 5am). I don't know if it really sets me up for the rest of the day; it's a lot of mental energy to compete.

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i want to be a good programmer like u,, how can i do it??

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Have you thought of becoming one of the best when you were just starting?

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Do you think knowing algorithmic theory is important for CP, i.e proof of correctness of some of the famous algorithms...etc. Also, where did you learn C++, you look really skilled with the language.

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How do you deal with procrastination?

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Do you have any advice on getting good at competitive programming quickly?

Also do you have any advice on what I should if I cannot solve a problem other than reading the editorial? (because just reading the solution feels kind of useless ad you don't really seem to be learning anything that you can apply on other problems)

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How 2 nutella?

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What problem paradigm (e.g. graph, dp) are you strongest/weakest in?

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    2 years ago, # ^ |
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    I'm pretty strong in some mathier areas like counting or NT, as well as generally pretty good at implementation. I think I'm weakest at heuristics/constructions.

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As a Californian, is there any particular reason that you chose MIT over Stanford?

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    2 years ago, # ^ |
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    In general, I think it's good to go somewhere further away for college, otherwise you're really always in the same little bubble. I like the culture at MIT a lot.

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ecnerwala have you ever participated in IMO?

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Are we in a simulation?

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How did you choose to study CS at uni? Did you have any other interests in other subjects? If so, what made you choose CS?

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    I had already done a lot of CS in high school, so I knew I was interested for sure. I also was interested in math or physics, but ultimately I liked CS too much.

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I was stuck in Round 664 Div2-C for more than half an hour. People say if you are stuck for more than half an hour, you shouldn't try more and just wait for the editorial. So, I gave up. Later when only 15 mins were left, the idea struck my mind. And I couldn't implement within those 15 mins. But after the contest, I submitted and it was correct. So, how should I decide whether I should give up or not?

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    2 years ago, # ^ |
      Vote: I like it +11 Vote: I do not like it

    You should never give up on a problem during a contest; that advice is for upsolving/practice, where you could potentially keep working indefinitely if you so chose.

    On the other hand, it can be good in contest to take a break or think about a different problem, so you can come back with a different mindset/different ideas.

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      2 years ago, # ^ |
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      It's perfectly fine to switch to the next problem (even without the intention to getting back to the previous one during a contest).

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Did you solve problems from UVa online judge?

There are very good problems and a vast number of hard problems but the problem is there are no editorials(idea, proof, etc.) for the problems. Codes of other participants don't help to properly understand most of the time.

Definitely it's true that many people somehow solved many problems from UVa in spite of this difficulty, I don't know how they did it. If anyone knows how they did it then reply, please.

What do you think ecnerwala, what should we do when we stuck for some problems in UVa?

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    2 years ago, # ^ |
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    No, I've never solved on UVa.

    Solving problems without editorials is definitely a tricky thing to do. I would recommend talking to peers about the problem, and if you still can't find a solution, it probably is actually slightly too hard for now; just set it aside and come back in a few months/years when you know more and then take another stab at it. Having problems open in the back of your mind could lead to you discovering something!

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hi as you can see i'm a newbie i can most times solve problems a and b in a div 2 contest's but i never get near solving question c because i still haven't studied any important algorithm's

what are some recommended sources for lists of important algo's and good practice questions for each of them?

ps: for math i'm mainly focused on improving my combinatorics I'll b happy if any one could recommend any other critical math subject for CP

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Trump or Biden?

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Your favorite video game?

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    2 years ago, # ^ |
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    Maybe Bastion, Exapunks, or The Binding of Isaac.

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Hi, Do you believe in God?

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Hey have you ever got mentally exhausted with a problem in a contest? like "I don't want to think anymore" kinda stuff

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