Winning (?) LeetCode Biweekly Contest 12 - screencast with commentary

I'm participating in Leetcode contest with semi-live commentary. Will I win?
leetcode.com/c...
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- Frequently Asked Questions: github.com/Err...
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- KZbin channel 2: / errichto2 (streams)
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[@sandeepdasika4638]

In addition to being a skilled competitive programmer, Errichto also has a pretty likeable personality. You look like a really humble person Errichto. Keep going man!

[@andydudus1577]

Don’t like his complaining about the quality of leetcode contest

[@shubh_chaudhri]

It feels really comforting that everyone makes such mistakes. Today i was very frustrated when i was getting wa on a very simple problem. Thanks a lot for these videos.

[@mauricz1473]

xd

[@yunjiehong4649]

Shubham Chaudhari puzzled face, that’s ok. Aha he can fix it

[@saikatghosh8072]

Can anyone suggest me how to start programming step by step. I am confused where to get started 😬😫

[@shubh_chaudhri]

@@saikatghosh8072 just go to codeforces problemset sort questions based on difficulty level that you feel not too hard for you and keep practicing

[@saikatghosh8072]

@@shubh_chaudhri what will then happen plz help I don't know anything

[@kunal_chand]

Well done errichto. All of this helps me to have an idea of what kind of thoughts flow in the mind of any competitive programmer during the contest. Its a motivation for me that reaching that level is not impossible. And that is all i need. Thank you so much for creating one of the best KZbin channel for competitive programming. 😍😍

[@saikatghosh8072]

Can anyone suggest me how to start programming step by step. I am confused where to get started 😬😫

[@kunal_chand]

@@saikatghosh8072 Read blogs (People on Quora have provided nice answers on how to start cp) and follow KZbinrs like Errichto, Gaurav Sen, Rachit Jain, etc.

[@Anonymous-nj2ow]

i'm reading "starting out with c++" in my intro class, it's pretty good

[@TOpCoder100]

Keep it up, bro. You make an awesome job fulfilling the dreams of many of us...

[@MiketheCoder]

Kunal Chand bohdan is my favorite Quoran competitive programmer!

[@user-np7zc7vc9g]

I have been watching your channel since google kick start round G, and I really learnt a lot from you! Thanks a lot, genius!!! I will always watch your channel and try to improve~

[@Errichto]

Thanks :)

[@jerwinsamuel]

I like that you make raw videos like this to help out others and show the entire process. Thank you. subbed!

[@moemosaad]

This was an awesome display of how to approach competitive programming contests. Please do more of these videos :)

[@boringtofu4433]

I like these videos a lot really gives some insight into what a competitive programmer does when under time constraints.

[@SangharshSeth]

Nice vid Errichto i myself getting started on competitive programming and these videos are really helpful

[@1.5millionsubscribers35]

Please make a video about DP on intervals, and thanks for making this video really helpful. Also if you can share how you started your journey of competitive programming like from which resources you started practicing and give some recommendations then that would be great 😊.

[@travis2659]

This is really cool, seriously here before 100k subscribers.!

[@chess_club812]

am I the only one who's watching it after 2 years of this video?

[@hdsiingh]

Thanks a lot!! I find these really helpful.

[@MiketheCoder]

Screw leetcode. How long did it take you to get to Div1 on codeforces? Also how many ad hoc problems did you practice?

[@Errichto]

5 years and around 1500-2000 problems, I guess. I don't know how many of them were ad-hoc.

[@MiketheCoder]

@@Errichto You give me motivation!! I've been green for 1 year. Time to start grinding. Watching you solve these problems is amazing!

[@kamils9712]

Natrafiłem na Twoj kanał przypadkowo i mimo tego że nie umiem programować to oglądam Twoje materiały. Pozdrawiam.

[@hemanthkotagiri8865]

Thank you for these videos. They are very helpful for me!

[@yaduveerakala5486]

Please make these type of videos, whenever possible 😊😊😊

[@TradeWithMVR]

Thanks errichto, I am improving my dp skills by your helpful videos. 😁

[@spicy_wizard]

I haven’t finished the reading and he had started....

[@ej9806]

Thanks for doing these LeetCode contests/problems! I like when you do LeetCode since it has all types of algorithms/data structures problems compared to other OJ. Also the problems are not wordy on LeetCode, I don't like when the questions have so many words, it's not an English reading contest

[@javidmammadli1217]

Hello,there is a question in leetcode which i cannot do for a long time.If you do it with explanation,I will be happy to watch it. Question : 309. Best Time to Buy and Sell Stock with Cooldown Thanks in advance :)

[@ProgrammingwithPeter]

This are some nice skills!

[@jitendermaurya5122]

Please make video on topic : DP on interval

[@saikatghosh8072]

Can anyone suggest me how to start programming step by step. I am confused where to get started 😬😫

[@yashgupta8734]

@@saikatghosh8072 Look at the codechef CCDSAP syllabus

[@saikatghosh8072]

@@yashgupta8734 what is that

[@saikatghosh8072]

@@yashgupta8734 will it help me to learn from beginner syllabus

[@juansimone757]

@@saikatghosh8072 www.codechef.com/certification/data-structures-and-algorithms/prepare

[@karthicksridhar840]

as a humble request, kindly stream for all the leetcode contests.

[@Errichto]

"as a humble request, please solve all problems from all platforms" :D I will participate in some Leetcode contests, not in all for sure. It's just when I have time.

[@ej9806]

@@Errichto Thanks for doing Leetcode contests, you are the best :D

[@saikatghosh8072]

Can anyone suggest me how to start programming step by step. I am confused where to get started 😬😫

[@saikatghosh8072]

@@Errichto Can anyone suggest me how to start programming step by step. I am confused where to get started 😬😫

[@karthicksridhar840]

@@Errichto thanks a lot.

[@jazzdestructor]

Congrats man keep up the good work

[@jamsrandorjbatbayar3652]

Nice! please keep shoot more videos like this one

[@latte88]

Thanks a lot! It's really helpful!

[@genuineprofile6400]

U are awesome Sir. Can you plz put atcoder AGC contest screencast. Would be great to see your take on logically difficult problems. Thanks Kamil for your videos.

[@MikePrice888]

Jesus you are so fast. Congrats!

[@Tetsuyia]

Any plans to do the weekly contest? (biweekly is locked behind a paywall)

[@jimmorrisshen]

As a pro programmer, you may feel Leetcode is too boring, however, it is very helpful for non-pro programmer like me to learn and improve. Thanks a lot and I hope you can keep on recording and posting your Leetcode contest or maybe also codeforce videos here. Thanks.

[@aalokkumar7290]

high I m a novice in competitive programming plz create basic to advance data structure and algo along with this type of videos bcz It would be helpful to us .plz reply

[@Errichto]

I do make algo lectures from time to time ;) check out those on binary search and dynamic programming

[@aalokkumar7290]

@@ErrichtoErrichto thanks for ur kind reply. hope in future u will make videos on link list, stack or queue as well. for interviews and

[@sourabhkhandelwal1568]

Hi Errichto, please make more such videos. Also, how could you come up with the solution for the 4th problem. You must be a great genius.

[@rishabhb2688]

That one was actually quite standard and easy. A problem which is almost the same as that one is Zuma from Codeforces a Div1B problem. So yeah, not that hard :)

[@rongrongmiao4638]

Plz attend weekly contest biweekly is a bit easier. I really enjoy watching you solve problems

[@TheDragon5215]

Dobra robota ;d

[@madimy]

Lol, ok Google getting triggered on my phone every time you say 'google' at 6:33

[@ivanrubnenkov919]

thanks for great content. Imo if you want to win leetcodes you need to have 2nd monitor with challenge description on it

[@saikatghosh8072]

Can anyone suggest me how to start programming step by step. I am confused where to get started 😬😫

[@chinmay6144]

Sir I have done my graduation In computer (coding) and Master too. But I still don't understand what test set and limits under Google code competition questions , will you please tell me where will I find the answer or if you can please make one video over it . I love to code but some how I am unable o reach to level you have . Hope so you will read it and reply . Thanks 😁

[@Errichto]

Google contest has some FAQ, you can read there. Basically, your solution should handle input data of some size withing the time and memory limit. You can start by visiting a platform like Leetcode or SPOJ, sorting problems by difficulty and doing easy ones. (sorry for a late reply, your comment was hidden by youtube algorithm as potential spam...)

[@chinmay6144]

@@Errichto thank you sir 👍👍👍👍❤

[@Gavinnnnnnnnnnnnnnn]

that guy in first must have gotten disqualified

[@val5_]

You deserved the win for sure there Can we get some graph problems thatd be very helpful thanks in advance

[@frenchfries6017]

make video on your thought process while you solve dp, backtracking.... how do you think... what are the key poiints you keep in mind while solving them... what were your struggles learning them when you were starting out.. thanks

[@Errichto]

I keep making those videos all the time...

[@nandagopalnaskar2452]

You rock.😎😎

[@ammartahir2140]

Could you please make a video on how you setup your coding environment for coding challenges. It will help me a lot.

[@Errichto]

Will do.

[@ashishjain871]

Beautiful :)

[@davidakoji3696]

A variation of first problem showed up in my coding interview yesterday. Very easy and boring.

[@tuanva6484]

what make you can solve it fast like that @@ like a superman

[@aadarsh8869]

awesome👍

[@noelpinto47_]

Bro can u do a video on maps, hashmaps in detail ? (I am a C++ beginner and the concepts are not very clear on the web)

[@bauyrzhanmaksot3022]

Thanks for sharing video

[@gamechanger9833]

It would be great if you can keep ur mic closer ...

[@aqib829]

Can we expect screencast of tomorrow's Leetcode weekly as well?

[@Errichto]

Nah, it's 3:30am in Poland. I will pass.

[@soumyapramanik9924]

Is it just me or does he kind of looks like Edward Snowdon?

[@shivamnegi7848]

I was able to done only 3 questions wasn't able to done last one.

[@arianphilips5777]

how you train your mind ?

[@arianphilips5777]

where you work dude this contests help ?

[@fabianpelopez]

How you have perfectioned writing that fast?, specially for programming. I can write fast but only words, programming characters is different matter

[@Errichto]

Practice.

[@Dus3826]

Neo2 layout ? :)

[@gatoradeee]

The best

[@jay-rathod-01]

Soooo good..... 😎

[@saikatghosh8072]

Can anyone suggest me how to start programming step by step. I am confused where to get started 😬😫

[@an1ketsharma]

Learn python. Easy to learn plus you will get a hang of basics of programming like variables fuctions. Then its up to you, if you want to sharpen your phython skills or learn more. Bas jo kaam pakda hai use complete karna, sab ho jayega.

[@lukkash]

exactly, start from Python and better use some websites on the inet rather than ebooks cos on websites are way better and contain more complex examples in comparison to those super easy in ebooks. Start from W3 Schools for Python and later go to e.g. HackerRank and solve easy and intermediate problems. Download VSCode, PyCharm and maybe Anaconda with Jupyter Notebook.

[@frankeke8541]

what is the difference between ++i and i++ ?

[@adriannormalny4260]

git ziomuś

[@vivek9patel]

Can you just zoom your screen , the code is not visible clearly!!

[@vivek9patel]

In every video 😬

[@AlexSav]

Really weird silent cocaster twin

[@Errichto]

:|

[@amitpatel3071]

sounds like sven goran erikson

[@arianphilips5777]

pro

[@mickyor1107]

At least the statements were short :P

[@shrad6611]

legends says errichto still think he is first hahaha Congrats for second btw

[@Errichto]

; _ ;

[@borsaniasushant1]

Is there anybody like him coding in javaScript ?

[@leWardable]

I'd like to see this as well!

[@4AneR]

So basically 4 of 4 problems are fine with brute force since constraints are hillarious. I don't enjoy these problems at all

[@Errichto]

Aren't only first two problems brute force? But yeah, the contest was bad.

[@4AneR]

@@Errichto Yeah you're right, but if 3rd had a bit smaller constraint, it'd be ok to run dfs from each vertex (without knowing this trick with double-dfs you showed). And 4th I wrongly thought it's an O(n^2) bruteforce while it's O(n!)

[@andydudus1577]

Narzekasz ze leetcode daje za proste problemy? Ze np. Diameter of tree robiłeś sto razy, i co z tego, inni nie robili, wiec maja okazje się nauczyć. Szkoda ze nie dali LRU cache to byś robił 60 min

[@andydudus1577]

Także nie narzekaj tylko wygraj chociaż jeden, bo nie widziałem żebyś wygrał do tej pory