30-Day LeetCoding Challenge Speedrun (

[@amansinhparmar3336]

Why William wasn't uploading 30 day coding challenge videos William: yes

[@NotFound-hy7qb]

Lol

[@Nick.....]

Meanwhile I'm spending 1hr + on a single leetcode easy....this man is amazing 👌

[@kuancs1]

relatable

[@yacinmessaoud186]

him:Why did it took me more than a minute to finish this standard problem ? me: i should end my worthless life..

[@kayvoncrenshaw1799]

God loves you man. He sent His Son to die and restore you in right fellowship and intimacy with Jesus Christ. When you truily deside and onlu want Him, He will give you fulfillment and His Holiness and Joy like you never have experienced! Trust Him and turn from all sins and place all your emotions on Him! He paid the Way

[@gabrielangeles1598]

@@kayvoncrenshaw1799 LMAO

[@nagalakshmichithambaranath1147]

Haha.. I laughed endlessly with your comment. Same feeling here.

[@heyya7357]

😂😂i can’t stop laughing

[@MrBUDGIESROCK]

Do you think you can give us a brief tutorial on your vim set up and how to set it up :D

[@arinroday302]

Petition for William to show his vim setup

[@subhramanya1406]

Yes please

[@SuperArjun11]

not exactly sure what flags he's compiling with but I got a pretty similar setup running on win10. Just install gvim and change the font + maybe add a shortcut for compiling and take the code for automatically appending closing braces from the vim wiki. I could share my vimrc if anyone wants it. Tip: to find where your vimrc is located use :echo $HOME and you'll find it under _vimrc

[@MrBUDGIESROCK]

@@SuperArjun11 Yeah, messing around with the vimrc configs is fun xD Curious as to what everyone else is using since I dont think mine is the most optimized at all, but it works for my purposes at least lool

[@reflex6588]

Yes bro!

[@bhanusharma658]

Just imagine he is on telephonic round of some company interview and interviewer is sharing a screen with him😅

[@mlguy8376]

You have it all wrong - It is not "some company interviewing him" it is "William interviewing the company" (as I sneak off to LeetCode explore section)

[@hackershil_ipad1451]

This guys has debugger in his mind. I take 1 hours for each. With alot of couts 😂

[@mks7846]

Please make videos on advanced concepts of competitive programming!

[@ivanliao4386]

When he finished a question I've also finished..... reading the question

[@algoseekee]

A legend! William and Errichto inspired me to challenge myself to post one video a day participating in May LeetCoding Challenge on my channel (as NOT a pro).

[@cocoarecords]

That will be interesting xd

[@samarthbhargav9554]

Imagine implementing dfs in less than 2 minutes

[@PREKRISTAPANA]

None of the competitive programmers can get LRU cache right.

[@RoyoItakoride]

This guy inspire me to enhance my problem solving skill..Even sometimes its hard to understand what he just wrote...

[@Satyam22jul]

After watching your videos you can't imagine how my inspiration will grow to achieve my 🔥Goals🔥😘kimo kimo kimo😌😍

[@ritikasingh1238]

Awesome bro🤟 But what do you mean by kimo😂

[@Satyam22jul]

@@ritikasingh1238 Remember this code kimo🤙 Future Code forces king Name🧐😌

[@ShubhamSingh-gk8vp]

Thanks william!!!! Keep up the the good work and more videos.

[@aser2535]

Can you use STL during this and do you use it? Can STL be used during interviews? Also, do you recommend one study discrete math 1st before getting into solving coding questions?

[@RawBert]

Yea discrete math gives logic

[@kylexie7579]

William is sooo tortured by a disgusting feature of early Leetcode - all kinds of empty tree, empty string, empty array, empty 2d array LOL

[@vishwanath-ts]

After he solving each and every problem, I understood that how much worthless I'm!!

[@twistwist777]

William: 3 mins solving a problem. . . . . Also William: it took longer than necessary! 🤯

[@codingwithzhia]

Am I the only one who noticed the new hair cut at 11.46? Nice hair 😄

[@nguyenquangred]

Can you make a tutorial on Dynamic Programming please :D

[@jameshenrich5027]

you're insane. FYI: @30:08, you can simplify this and get a solution that combines all 3 cases into one adding logic to know if your in the sorted half vs non sorted half on every iteration and recurse in the array where you know the number is

[@scoopedcontent]

Can you please make videos on advance data structures like segment tree.It will be very helpful

[@TerrexoDesign]

Guys chill, it's "[FIX] "NAUGHTY USB":introducing a ridiculous USB bug with the Surface..."

[@camper8650]

well, I noticed that you didn't take bath for few days.

[@yunjiehong4649]

Camper ？how can you figure out. Many people do not change clothes after taking a shower because they only stay at home and take a shower every day. Make no sense to change clothes every day bro

[@Tier1230]

@@yunjiehong4649 yeah but wouldn't your clothes get dirty which kind of ruins the point of the shower

[@parvgour5284]

Yunjie Hong dirty man...

[@AntonioMac3301]

He could’ve done his laundry... I don’t own many clothes so I do my laundry every week which could be exactly what he’s doing...

[@TheYaBoyKevin]

Seeing William take 1 minute to solve it while it takes me 6 hours to arrive at a bad solution or sometimes never solve it is depressing 😞.

[@skyFullOfStars]

True!

[@tylerlee232]

This dude probably saw a probably similar to it a hundred times by now. His problem solving process is mostly based on applying memorized solutions rather than original thinking.

[@rocknroll7967]

@@tylerlee232 I don't agree with you. You cannot reach international grandmaster on codeforces without original thinking.

[@ask4144]

The first challenge 10s hahahaha!

[@Zzznmop]

2kilo o I wonder how many times he’s seen the solution to that problem!

[@mournblank]

I think he should play blitz chess

[@Warrior97489]

Its standard question of bitmasking. Just take XOR(bitwise operator) of all elements. Those elements which appear twice cancel each other out leaving only the unique element.

[@Warrior97489]

@@Zzznmop Its standard question of bitmasking. Just take XOR(bitwise operator) of all elements. Those elements which appear twice cancel each other out leaving only the unique element.

[@LeagueJeffreyG]

Bro really just set a loop to 10million and brute forced happy numver hahahaha

[@VeeWebCode]

In CSGO we call this walling.. :)

[@kartarsingh7776]

Nah its an aim bot

[@mahmoudabdelsattar8860]

when did u start learning code????, im a fan ur super freaking fast

[@GodOp_yt189]

Bro in calculate the height of tree you just do it in a single line like return 1+max(diameterofbinarytree(head->left),diameterofbinarytree(head->right)) ; In a simple way

[@ajitchoudhary352]

Bro your typing is damn good I wanna learn that fast typing can you give me some tips

[@dagadbm]

keybr.com typingclub.com

[@abhishekjindal2389]

Week 2 : Problem1 (Middle of LL) : you could've done it in just one pass using fast-slow pointer method Week2 : Problem2 (Backspace String compare) : You used O(N) extra space whereas the problem statement restricted it to O(1) :) You could've traversed the string backward to know in advance the number of characters to be skipped which is truly O(1)

[@b0606089]

I also type code this fast... In my mind

[@vishalchaurasia96]

Just amazed by seeing your videos.

[@shivamjones952]

What keyboard are you using?

[@alexhaszard]

my typing gets faster just watching this guy

[@Zzznmop]

Imagine every single program as a single function. Now remember the solution (that is a solution you don’t understand) to a problem you have already seen before. Now type it LOUD AS YOU CAN. *boom* competitive coder status === achieved

[@Eddie-um6cw]

Do you think you can give us a setup review or at least give me your keyboard name cause im curious....

[@tomsanjuan1]

Any chance you could film how you type from above? I'm convinced you have 6 thumbs...

[@nelsonthekinger]

Hi, have you solved many problems like this ones before?

[@aaronlin4502]

For me I need one hour in avg to complete one and this guy did 30

[@yacinmessaoud186]

Great job keep it up !!

[@manjunathvasam4981]

Man was starving for your video

[@1808merce]

Hola amigo, me gusta tu rapidez en la programación, yo aún soy estudiante de ingeniería en desarrollo de software y quería saber que consejo puedes darme para aprender a programar y tener rapidez en la programación gracias saludos desde México

[@p41ne95]

What did you use/where did you go to learn coding?

[@VeeWebCode]

What keyboard you use?

[@dev.nghean]

i love you

[@batmendbatsaikhan8496]

Hello. I am a high school senior competed in IMO and IOI so I'm very confident in my theoretical skills. However, since my 5 hours olympiad days are coming to an end, I am migrating to Codeforces to have fun. But after a few contests, I understood that it was hugely a game of speed, and I am struggling to keep up. So can you make a video about how you prepare for- - Finding solutions quickly - Maybe the way of thinking? - Implement those solutions quickly Thanks for making time to read this comment, All the best and to the Impossibliest of all Impossibilities, Batmend Batsaikhan,

[@kuancs1]

in the same boat. hope he sees this

[@traditionalconcerts2950]

Me: Run Code first than Submit and then code has many errors. William: Directly Submit the code and code Accepted

[@zanies6288]

William won't directly submit it if it was during a contest.

[@jrenzie]

Men you're so good 👊💪

[@hanlisepro2917]

Him: Why it took me more than a minute to do this standard problem Me: Why it took me more than a day to do this level 800 codeforce problem

[@tonymok535]

Me: spending two minute to solve easy questions and thought I’m fast William: damn it takes me more than a minute to solve a standard question

[@gunasekart.j3552]

Hi, William lin what a great video. I am very inspired by your speed and accuracy in solving the problems ..you have a very good sprit. Continue keeping the great spirit and sharing your spirit to the universe ....Could you tell me the software you are using for the timer.

[@gladwinrojer273]

21:01 Valid Parenthesis String

[@dhruvnation1884]

bro your are very inspirational

[@b0606089]

When I checked your solution for buy and sell stock.. I am confused how it works. I tried same solution in 121 problem of leetcode. It failed in example tc. Why

[@ibrahimyzineb5747]

Hello, the solution for this exercice is not correct. It's more complicated than what he coded. So it's normal if it's not working ! it's a complex DP pb :)

[@starlord0732]

Ce to say that it would not work. He got lucky with that particular question. Even if he did not get lucky, he could've come up with a working one in like a minute imo.

[@warsin8641]

How do you find the MOTIVATION to do this man holy fuck

[@miunify]

Wish I was this gifted...

[@hacker-7214]

@Donald J. Trump you're dumb if u think he isn't gifted. Since ure trump u are dumb by default

[@Warrior97489]

@@hacker-7214 He can be both talented and have practiced hard. Why it has to be one or the other ?

[@clipit4503]

Im learning for olympiade(senior) what level do i need to be to peform good? I solved many problems (the exercises on the website of olympiade of informatics) And how long did it take to study to end second im 15 hopefully i can make it into ioi cause it is not very populair in my country(belgium) And maybe even end up top 3 i feel like i can get there or is this too ambitious? Help???

[@dbsllama6042]

Not too ambitious buddy, u can do it!

[@jeb_7749]

Охереть. Он решает только 5 минут, а я уже устал останавливать видео, чтобы понять его алгоритм

[@partth-p9t]

This guy finished 30 days worth of code in 1 hour lol

[@parvgour5284]

he might have attempted all the questions previously with another id...

[@owenizedd2830]

Technical parv No he didn’t , I bet you don’t know about codeforces, see his rating there, he’s red coder, if you don’t know red coder means, I hope you can find it out, and understand how unreal redcoder is.

[@parvgour5284]

Owen Izedd I know about codeforces bro and his rating and here, I am not talking about codeforces and his rating. I am giving the possible condition that might have been applied by him...

[@owenizedd2830]

Technical parv Dude! You’re not talking about it but it is 100% relevant here, Do you really think a legendary grandmaster would do that kind of thing? Lol he can solve a lot more difficult and different level problems on Div1 in under 2 hours (CF Round). These problems are nothing just Div2 or even Div3 for him. His rating 2800+, if you understand how different that level is, you WOULD NOT say that.

[@carlosmariooliveira5566]

I like your movies a lot

[@Cookie-mv2hg]

Yeah right more like 30-minute LeetCoding Challenge for him... I have to pause to read the question or he just finish in the blink of an eye.

[@kikis5072]

programming is not about learning stuff fully, programming are ideas! you dont have to be smarty

[@darkcirtnus4611]

I wish I was like you

[@AmarKumarPatnaites]

can u suggest me a book or website to do coding from zero level

[@bhavyaahir9833]

Does anyone know what extension he is using for timer?

[@leisure8969]

Glitchless any%

[@rajshekhar2953]

what happen to ur vice why don't u increase ur sound level ? what is the use of that expensive mic if u don't use them properly. I have to use a booster extension all the time to watch all of ur videos. I have seen many KZbins using 1 dollar microphone mic and able to produce loud and clear voice.

[@MAKafi-mj7iv]

@William Lin , Can you tell me,bro how can you solve the problems without reading it? Nice Coding.

[@zenzen318]

I am not WL, but still it's obvious - he has seen the problem many times (probably) and makes quick conclusions.

[@Warrior97489]

​@@zenzen318 Don't waste time reading problems. Most of the time, they just make up some long stories which is completely unrelated to question. First, look at sample input, output and explanation(if provided) and then skim through the passage to get the jist.

[@Warrior97489]

​ zeN zeN Don't waste time reading problems. Most of the time, they just make up some long stories which is completely unrelated to question. First, look at sample input, output and explanation(if provided) and then skim through the passage to get the jist.

[@naveengorojanam7999]

For Middle Element of Linked List , you could have gone with slow and fast pointer technique. It is much faster than traversing the whole LL

[@ezdp]

i forgot to do the 10th day problem...

[@hiddencuber2250]

Understood nothing but inspired

[@bhaskar08]

Do you live near the airport?

[@prashanthasp6723]

In the first problem if vector size is even then xor solution will not work

[@user-mr-m12312]

Okay cool

[@kbcoder3734]

What a speed...

[@pratyushmisra2516]

My two teachers in cp William lin and Errichto

[@decisive_tiger436]

You upgrading aren’t ya 😏 or is the keyboard switch up and camera up quality just me

[@kartaLaLa]

How often do you record LC 30 days video tmw: Yes The Mario-like speed run is interesting, you may invite other CPers to join this as well~ Great video!

[@shyamvaghela5236]

Timer is amazing. How to set up it.

[@haywired5903]

It was good to see him get stuck on a standard longest contiguous sub array problem, I have some hope!

[@karthikbhargav6148]

peace sign orz

[@rahil_rehan]

ok cool!

[@llawliet1750]

are u using linux or windows

[@VivekKumar-fe4mt]

Here is a playlist where I will daily upload leetcoding challenge scolutions screencast. kzbin.info/aero/PLYTuT5lJJkPOy2MKsAMDjFhBWyG_VNYoO

[@prashanthasp6723]

Use this command in Ex mode to compile and run program !g++ % && a.exe

[@kunalgupta8380]

How do you type so fast Plz tell

[@xsharawi]

this run is invalid because the time ends when you get AC not when you submit, jokes aside that's pretty good

[@hellowill]

Very cool, but some you used extra space etc. which would be disqualified

[@tmwilliamlin168]

In which challenges?

[@hellowill]

@@tmwilliamlin168 Backspace string compare. Looking back it was a follow up only.

[@alitsuya9774]

You are monster!

[@aislam9331]

I love errichto also and u also

[@mrfrontend1]

Superhuman!!!

[@nelsonthekinger]

I'm shocked

[@hungvu11]

How you think so fast 💨 😿

[@devajitasem4618]

My speed run will take 30 days.

[@Mohith7548]

It would be better if you do this in chunks of weeks.

[@kaiwang2924]

Are you also considering quit coding after watching this video?

[@irvinge4641]

SDE, SDE 2, Senior Engineer, Principal Engineer, Staff Software Engineer, William Lin Engineer (committing 1k lines of code per day)

[@nemuelquispelopez6784]

Podrias poner subtitulos en español, aun no domino el ingles please.

[@jonymusic7752]

Tenemos que aprender bro:( yo ni se , soy un noob de primera en el inglés