Winning Codeforces Round

[@rodanus7112]

Me: Reading the first sentence in the description. William: Finished solving the problem.

[@nahidulislamnahwan2655]

🤣🤣🤣

[@0xjinx]

same here lmao

[@siddharthsingh6991]

Exactly same here😂

[@fresh_wind87]

prodigy

[@bakashi1603]

William solves the question before I even finish reading the question LMAO

[@Shelly888-s1r]

Well something I've heard a lot of times in his videos comment section...but every time I read it ...its hard to believe ...coz its true....😕😕😕

[@gvsharma2643]

Do practice for 3-4 hours daily for 2-3 years => no matter what level you are now, you will be able to solve like him

[@SamDaBest]

The first 3 problems are really simple

[@SamDaBest]

I was green a month ago, and I’m now Blue, you just need to practice and learn new things

[@Shelly888-s1r]

@@Offensive_Security1998 well let's not just bring the word extraordinarily talented...bcoz ..its gonna make many of us feel bad....lets just say...he works hard and uses his brain in a efficient and better way....because by your statement it sounds like that only some of us can be good at it...and your words that one requires a lot of dedication ..are true AF...

[@fernandomonsivais3120]

This guy's fingers respawn really quick after being cracked

[@rakeshhotker4762]

90% of the comments praising him, 5 % trying to learn, 5% don't know what's going on.

[@charlesjsescoto]

and 90% of those 90percent dont also know wats going on😂

[@Warner1138]

Yooo I thought they nerfed this guy in the last update

[@wavydips4479]

Bro glitch

[@rexgamingcsgoandmore4833]

When you won for some reason I felt very happy. Seing you in the top of the leaderboards during the contest is very satisfying. Great Job!

[@mateuszbugaj799]

it's like seeing your friend on the TV

[@samiroli3839]

I like to watch these kind of videos and pretend that I understand what's happening....

[@vedantraghuwanshi555]

Solved the third just before 5 secs of round end.

[@AnuragSingh-jq1hz]

I've been participating in these contests and was able to solve only one or two problems but after practicing for 3 months, I solved 4 questions today but had no clue for the last one. I feel so confident right now!! This all was because of you. I was so jealous of you that how can a guy solve the question while I'm reading the first line but now I can solve them too!! And will get better and beat you one day. thank you for pushing me towards competitive programming buddy

[@GGxEpsilon]

nice ambition, i am constantly stuck at 3 problems/div 2 contest for months. cant get past that.

[@AnuragSingh-jq1hz]

@@GGxEpsilon Just keep trying buddy. You'll get there soon. Believe me.

[@krunalkp1032]

Hello anurag . I have learn python .I do coding on python.I usually do coding practices on code wars. I solved so many problems there means basic problems. Now i want to shift on data structures and algorithms . Can u suggest any good reference for learning data structures and algorithms .

[@AnuragSingh-jq1hz]

@@krunalkp1032 I highly suggest a youtube channel MY CODE SCHOOL. He explains stuff in C++ but is the best. I only learned from his videos and solving lots of questions. For python checkout CS DOJO although his DS Algo stuff has just started

[@krunalkp1032]

@@AnuragSingh-jq1hz yup i have seen one video of William lin and he suggested one pdf . Beginner hand book for competitive programmer. But examples are explained in cpp. I have started coding on python . So want examples in python too. I have checked cs dojo videos its uploaded before one day. I will check that out. Btw do u practice on codeforces only ? Or codechef or hackerrank too ?

[@animaniac5750]

This guy must have worked hard to reach this point I can't imagine his determination to reach this point.

[@xyz8206]

nah he just enjoys it. Some people really do.

[@sanket1702]

@@xyz8206 yEAH i ThiNK If U enJOy SomeTHing U can Be REally Good At IT.

[@goodperson7427]

@@xyz8206 True, I enjoy programming more than anything. But I am not as good as him. Because my mom wants me to concentrate on my studies more and I am just 16.

[@unixpert321]

He's been coding for 9 years

[@NenekTerbang1]

Rule no 1: passion

[@tylerxiao2656]

Awesome, I was waiting for this! I am proud to be part of the William Lin fan club on codeforces.

[@ashispaul0013]

I was stuck on the third question for like 40 minutes and then gave up lmao. How does he go like "Ow, it's n factorial minus two to the n". I mean seriously how?

[@nileshchandra6435]

You could just have bruted for smaller testcases and found a relation.

[@cwagnello]

He's got a very strong math background.

[@IzIGaMerTube]

I was on that question and it took me 20 minutes and I feel relieved knowing that William also took a while on it.

[@chiragsainii]

Ngl spend 1.5 hrs doing first two, and then i knew i cant solve more😂so just stopped. This guy is so good. Wanna be like him

[@ishrarchowdhury4850]

so true. I was so happy i could solve B (was my first B solve during contest) i dont even read C. :( later found out B was TOOOO easy

[@chiragsainii]

@@ishrarchowdhury4850 keep pushing it. We will beat Lin some day in contests hopefully.😂🤘

[@saikat93ify]

You made the observation that a 4x4 matrix has 4 2x2 matrix so it is not possible if m or n > 4 lightning quick ! Almost as soon as you finished reading. It was stunning

[@Heulitig117]

I had to rewind and pause to read first question since he finished it so fast.😅 I have no idea what sort of macros he has defined that's why I didn't get most of the solutions.

[@kishorebatta7395]

Forget code. The sound of his keyboard makes me watch the complete video.. 😂😂😂

[@GGxEpsilon]

You are a speed demon, I was able to solve only 3 problems in 1 hour. You read D in 1 minute and thought of bitmask dp's, I couldn't wrap my head around it, hope to be like that someday.

[@SecondThread]

Nice win!

[@joanferleymosqueralozano5760]

I'm just getting started, and I'm following your advice. I'm Colombian and the English is sometimes complicate, but I hope to improve to much. Thanks bro! Best regards!🔥😎🏀

[@truepachi1689]

Hey William! Could you please do a video on your stats, extracurriculars and awards that got you into MIT? Thanks (btw loving the uploads bro).

[@gaurav3794]

I solved C when it was 45 min from start. I used %(10**9+7) on each step But forgot to use it in last step .😭😭

[@nileshchandra6435]

Same.I did a stupid mistake and forgot to check if ans is becoming negative.

[@manas_singh]

I wake up to Lin winning I sleep to Lin winning.

[@fruitygranulizer540]

lmao he was more happy about the small flex of finishing the first one within the first minute than he was about winning... what a flex

[@basyar4493]

me: satisfying with the keyboard XD

[@carlknightcoph9494]

This guy makes me want to be a coder again 😂 sighs i get distracted by online games and i havent solve a prog problem in like 3 monthns now im getting rusty 😭 any tips for concentration

[@rivaille8867]

Congrats bro you won 2 contests in one day

[@Cornbreadddd]

I know absolutely nothing about coding, but this is fascinating.

[@rakeshhotker4762]

There are N guests (numbered 1 through N) coming to Chef's wedding. Each guest is part of a family; for each valid i, the i-th guest is part of family Fi. You need to help Chef find an optimal seating arrangement. Chef may buy a number of tables, which are large enough for any number of guests, but the people sitting at each table must have consecutive numbers ― for any two guests i and j (i

[@jayachandra677]

Asking help for a question from an ongoing contest is against the contest rules. You'll get the editorial tomorrow right? Why do you want help then? Just practice and you'll be good in the future.

[@rakeshhotker4762]

@@jayachandra677 mate, I want to understand the problem.

[@bhaskargarai8371]

Hey man,I really can't understand how you comprehend the problem in such a little time....Is this something you can do naturally or did it came with practice???If I start reading a problem ,I take so much time in trying to understand the problem,understand how the output is calculated,how the output must be written...just boggling....

[@bingpingbongpong662]

he codes since he was like 11 or something i think, he probably also studied algorithms and thus, he can do it so easily, practice and dedication

[@krumpy8259]

Huge talent plus practice = goat

[@abhalla]

@@bingpingbongpong662 I don't think it's about being a good programmer. He's probably just really good at problem solving and mathematics in general.

[@prakhanshubharadwaj1545]

I don't know why I always think I should quit coding.. It's been a year that I started coding.. But still I am not able to make small small school level programs... I am so demotivated man... I don't know what to do, how to do, every time I think about coding a fear in my mind comes and I quit... I get anxiety attacks when i try to solve problems.. It's been a year I wasn't able to solve a single coding problem WITHOUT CHEATING... Anybody who is reading this comment please help me out please I need some help

[@prakhanshubharadwaj1545]

Sometimes because of frustration I cry in front of my parents n ruin there day too... Help me please

[@justforfun2238]

@@prakhanshubharadwaj1545 just stop programming then if you found it not suitable for u, what's wrong with that? There are a lot more fun things to do.

[@justforfun2238]

@@prakhanshubharadwaj1545 if you can't solve problem A for a year that's for sure frustrating and is a sign to stop.

[@kebabthegreat369]

If you're not enjoying it, just take a break!

[@prakhanshubharadwaj1545]

@@justforfun2238 you are right sir but I took admission in computer science course for 4 years this is my third year I will graduate in 2022.

[@ashbjorn]

ugh, the cracking of the knuckles really gets me cringing every time he does it :) Great result though, gz!

[@Mynetrix]

Why? It's normal

[@johnhammer8668]

Thanks dude for posting

[@mridulkumar786]

3rd was rocket science for me

[@arunkumaracharya9641]

Comprehension+practice = speed

[@happynewyear6123]

hmm that was very quick! it means a lot i guess

[@tonesandhi308]

WTF I have spent 5 mins to just try to understand the input and output but he solved it in fking 1 min?????

[@darshantawte7435]

This guy is prodigy. I doubt how much practice did he do to reach such a level.My goal is to reach candidate master for now 😁. I think this contest was good but the difficulty gradient was not good for a beginner to learn. First 2 questions were too easy,third was good and 4th for sure most people don't know DP and bitmasks

[@ztrixx3280]

Congrats william!

[@pratikchavan8057]

Problem D could be solved without DP also by assuming the first column to be have even 1's or odd 1's and selecting best case

[@jashanbansal2613]

Well I am expecting solutions explanation also :( Edit: No worries, Received notification from secondthread :)

[@rakeshhotker4762]

class Node: def __init__(self,data): self.data=data self.next=None def takeInput(): InputList=[int(i) for i in input().split(' ')] head=None tail=None for i in InputList: if i==-1: break else: newNode=Node(i) if head==None: head=newNode tail=newNode else: tail.next=newNode tail=tail.next return head

[@shubhamk840]

It was my first contest - solved A in 2 min, second in 25 min , and then got fucked..lol.

[@Nanefull-racing]

"A" problem is just to print 12345...n???

[@BarkaDog]

Yup

[@khakimsmagul5769]

Yeah, in the beginning of contest, I thought that the solution should be harder and didn't pass this solution, but after some time I got sure that this is really the solution

[@SouravendraKrishnaDeb]

same lmao

[@justforfun2238]

any permutation works actually

[@UK-sf9vd]

@@khakimsmagul5769 lol, I was scared when I answered the question and ended up laughing when it passed the pretests

[@akuljuneja62]

hallo friend ,, i m really big fan of your problem aproaching skills, and i really leared from u,, pleaz keep posting such videos..

[@Aaron-xu1gz]

Great work Lin

[@amanjain9447]

So far I thought Death is the most dangerous thing in this world, but now I came to know that “Not knowing how to invert Binary tree “ is even more dangerous. Thanks to Algo Expert.

[@imranfarid8186]

Wow, you're just sooooo fast! Hoping you'll defeat Gennady someday in the Code Jams!

[@UK-sf9vd]

I could solve only two questions in two hours. I look this guy as a god now!!!

[@onnoy4304]

Suggest something so that I can learn c++ that goog...any tutorials or books so I can learn advance c++.I do problem solving but can't do much .

[@ericnyamu9981]

Keyboard amsr on another whole new level.

[@JdUkGAming]

WELL DONE BRO

[@2dstudy705]

Please make a video on how you learned to code!

[@amitsaraswat5908]

This guy is like God For Programmers.

[@rufusdrew]

You're the inspiration

[@spamkontojozka2923]

This is how I see university-driven interviews. You get random Codility task and have 30 minutes to solve it. It doesn't matter you have great experience with working and designing complicated business systems.

[@rudra4830]

1st question solved within 10-20 seconds oh man!

[@pbgaming3631]

just came to listen the keyboard asmr

[@umiuo8894]

Your videos are so long to watch till end BTW respect from India

[@IvanManchur]

Do you use the mouse to draw on canvas or a graphical touchscreen?

[@REAPERxx420]

So I'm very new at programming, I'm teaching myself and I have a question. So I have been learning javascript and I'm told it is case sensitive, so how is he uppercasing his for loop? Is it the language he is writing in? P.s I am very new and most of this video is a alien language. So take it easy on me.

[@vigneshwaran9209]

He is using macros for trivial tasks

[@DKYtut]

If you're new there are tons of tutorials for beginners, also, competitive programming is not the same as regular programming, it's not really practical in a way. The general concensus is that competitive programming doesn't translate to programming in your worklife.

[@andrewlei2980]

Hey Jeremy can you do more videos where you teach interesting and hard questions.

[@wulymammoth]

Who is Jeremy?

[@fanaticalplel1003]

This man prolly has google and ibm and every single company on his ass. His life is set

[@manmohansharma5794]

i dont get the logic behind if n>3 print(-1).could u please explain!

[@manmohansharma5794]

Question D

[@w47-p1e]

Read the editorial then

[@aryansiddiqui3574]

Please a do video on how you got into MIT (SAT score, subject tests, GPA, extracurriculars and essays)

[@tdpencil2811]

Bruh he lives in Taiwan

[@aryansiddiqui3574]

@@tdpencil2811 bruh you need most of the stuff I mentioned to actually apply to US

[@khambui3308]

hi Will, now i'm 17 years old. I only know a little bit about algorithm. Could you tell me how to improve algorithm mindset. Thanks a lot. Love from Vietnam

[@ishrarchowdhury4850]

that keyboard sound OOOOFFf

[@anonymoussloth6687]

How long did it take from being a beginner at CP to where you are now? Also, on average, how many hours did you spend daily on this?

[@benhardsim8629]

Holy crap there is a lot of pretest

[@moustajo]

i didn't get anything but congrats bro damn

[@shariqshaikh5715]

William You are great Please ANswer my question?

[@VrickzGamer]

Please make the video for CODECHEF AUGUST LING CHALLENGE

[@radhifauzan3502]

I played this video so i can sleep

[@lostecho01]

Bro wait why youre not activating monetization on your chanel?

[@jodingr]

I came for keyboard asmr

[@manishaarya8926]

Is he for real?he is an inspiration but skills like him requires multiple years and normal people don't have the patience

[@murshidaakter9480]

william lin .. ...... How old are you? And as a beginner , what should i learn for become a data scientists ? Which programming language should i learn ?😊

[@gokul8747]

can you make a prep guide on ioi

[@praharshsingh2095]

can u share your cp template lin?

[@darshantawte7435]

Just go his codeforces profile and copy paste from one of his submissions

[@johnmcsudden3176]

Did he fail the system tests or something? I don't see him on the chart

[@amurto630]

div2 isnt rated for him

[@thachlp]

check on show unofficial

[@johnmcsudden3176]

@@thachlp oh right, thanks!

[@THEkarankaira]

why whiteboard date is 26 July??

[@greatmanokonkwo656]

How do you prepare all the previous code? Cuz I see you use a lot of pre-written code.

[@johnhammer8668]

Also can you show what your read function does ?

[@rohanpandey9957]

william i have a qn which software do you use for using C++

[@adityaguin4913]

VIM

[@samprasdsouza6993]

next tourist !!

[@samprasdsouza6993]

@@jalsol Mean while tourist won CodeJam 7th time in a row !!

[@vishnupillai2468]

Hey Lin, would you please share your vim config?

[@kisuke0152]

What is the reason that you changed from using java to c++ ?

[@ridhwaans]

have you considered using a slimmer not mechanical keyboard?

[@mohitsingh-nf5vl]

was this your first contest .How u participated in Div 2

[@shelbyclan8801]

How did you learn to solve all this problems?

[@darshitgandhi9122]

Hey buddy...which ide are you using??

[@shadyashraf1031]

do you guys find this easy ?

[@Shelly888-s1r]

I feel good when you win... But demotivated when you solve the question....because...I feel like a os with a memory in KB...and you are an os with a memory in tera bytes surplus a powerful graphic card ...when it comes to coding....that's how fast u are...😢😢😢

[@gilangeizan2282]

Ikr

[@Crucizer]

Just PRACTICE

[@priyanksatasiya1366]

43:11 My name is there on time 00 :00 :58 😅😅

[@eth782]

Why’d you have code written already did you have a prefiew

[@Ravisingh-dl3jr]

I solved the first question in 30 min .

[@akankshareddy177]

Does he get the template prepared earlier for evry program🤕🤕

[@vinaynarayana4742]

What is FOR in his code, it is not like a normal for loop can someone explain

[@v.smourya8005]

hey can someone tell me why is he not using cin and cout and instead using read ... is that a template?

[@hrmeet0509]

he might be using #define cin>>x read(x)

[@v.smourya8005]

@@hrmeet0509 Thanks sahil :)

[@vinaynarayana4742]

@@hrmeet0509 how is he using for loop with FOR (t)

[@hrmeet0509]

@@vinaynarayana4742 same thing, #define for(int i = 0 ; i < t ; i++) FOR(t)

[@vinaynarayana4742]

@@hrmeet0509 thanks

[@andrewkreisher689]

bruh im a 6-3 2022 at MIT, something tells me youre not gonna have a hard time... lol

[@adamcholewinski7240]

I don't even know what is happening here LMAO