Spiral Matrix

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Instagram: / kevinnaughtonjr
Twitter: / kevinnaughtonjr
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GitHub: github.com/kdn251
MUSIC
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woke up tired (playboi carti - wokeuplikethis* lofi remix) by listless
/ woke-up-tired

[@KevinNaughtonJr]

spirals are FUN
instagram: instagram.com/kevinnaughtonjr/
twitter: twitter.com/kevinnaughtonjr

[@randeepsiddhu]

This is how you realize the importance of meaningful variable names

[@Srijeet040689]

Absolutely beautiful! Kudos for the explanation, and for choosing meaningful variable names :)

[@ahasunos5914]

I had the same approach to solve the problem but struggled for 3 hours because of the variable names. Thanks Kevin.

[@shwetagoel31]

This is one of the cleanest solutions! Many thanks!

[@igornesterov711]

Thanks! Great explanation! And as already mentioned deal in variable names!

[@itsbenteller1]

Such a clean solution. Thank you!

[@darod6098]

Thank you for all your work man :) I'm going to have an interview for interning at Facebook this month. First missing positive of LC or more videos related to Binary Search and strategies to apply on arrays would be AWESOME. Thank you.

[@sumitanglekar6309]

You just made it look so easy again 🙌 Kudos

[@PallNPrash]

v nice Kevin...like the way you explain your logic, even as you are typing the solution

[@richardzhou5906]

This is a clean solution, very easy to understand and implement

[@abhishekmulay759]

Amazing video. Keep up the good work.

[@subhamagarwal476]

watched it once and got it . Thanks kevin.

[@dhruvseth]

Hello great video Kevin, can you please explain why you had the && res.size() < size check condition with every for loop, I am a little lost. Thank you!

[@lakshaygupta6180]

Thanks Kevin!! .... nice explanation

[@pewdiepieschair2693]

You sir are an absolute legend

[@leanobajio]

lovely work, Kev!

[@KevinNaughtonJr]

Dean thanks Dean!

[@Wisekuma]

What is the practical application of doing this - other than for a job interview?

[@shubamsharma5745]

Thankyou sir for awesome and such beautiful explanation.

[@OverLordOfDa3rdWorld]

Wow, I thought about doing it this way but was afraid to because I thought the numerous for loops inside the while loop seemed wrong but apparently not lol Thanks Kevin! Just one question, why have the same check inside the for loops when the while loop does it for you ?

[@louistannudin2486]

The nums.size() < size check is to help with dealing with certain edge cases that makes the algo (for some odd reason) run backwards like this case:
[[1,2,3,4],[5,6,7,8],[9,10,11,12]]
without the check, the output is:
[1,2,3,4,8,12,11,10,9,5,6,7,6]
which is incorrect

[@chintalapativenkataramarahul]

I think we need to check the same condition for all for-loops because the ArrayList may get filled mid-way of the while loop(i.e maybe after running only left to right or after top to bottom) and in that case, we don't want the rest of the for-loops to run in that iteration.

[@mnchester]

amazing explanation!

[@PramodRj]

Good JOb Kevin.

[@sumitghewade2002]

Thank you so much for breaking it down so neatly.

[@chintalapativenkataramarahul]

Thank you!

[@vivekkumarmaheshwari3007]

This is the best solution because the approach seems pretty obvious.

[@mailtobasit74]

Thanks a lot

[@sowmyasg8127]

finallyyy understoodd :)) thankss a lott

[@aswink1505]

love your coding videos.thanks for your help. I have a quick question. If you have 5+ years of software engineer experience, should we only expect medium or hard problems?

[@KevinNaughtonJr]

Thanks Aswin and honestly I think it varies regardless your level of experience...i kind of think the level of difficulty you get is up to chance...but for system design interviews I think the more experience you have the more they'll expect from you!

[@aswink1505]

got it. thanks for the info

[@KevinNaughtonJr]

@@aswink1505 anytime

[@danielzuzevich4161]

Ty

[@all-open-source]

Awesome. Seems like the easiest method you come up with.

[@ishanrtripathi]

Hi Kevin, Can you tell me what software you use to edit the videos with the music in the beginning and the end. Is it some mobile app or some Adobe software ?

[@lordmill4572]

dude you are genius

[@kamalkumar7133]

whole code in a single screen. GREAT

[@surabhipriya4333]

got this question for my interview today.. Wish i had seen this before.

[@mohanaravind7656]

Did you end up getting the job? and what company gave this question?

[@surabhipriya8386]

@@mohanaravind7656 Microsoft ! No I got rejected in their final round

[@southece]

Same with me. I got this question in interview. I was not able to solve it and got rejected. Interview had only this question.

[@naveen.v1090]

thank u

[@mohammedatique8389]

thanks

[@anirudhatalmale5575]

awesome solution

[@swati8539]

hey kevin
can u suggest coding sites apart from leetcode for entire preparation for google or Amazon or Microsoft interview.
thanks 🙂

[@KevinNaughtonJr]

I personally think LeetCode is the best but you can also check out hacker rank for other questions and pramp for mock interviews! If you need help preparing or want to practice mock interviews etc I offer those services too here: www.patreon.com/KevinNaughtonJr

[@Homelander007]

Thanks Kevin . can you plz upload this: 1192
Critical Connections in a Network

[@KevinNaughtonJr]

I've got it on my list :)

[@akshayavenkatesan2912]

Please do this ASAP

[@kevinjohn553]

duddddeeeeee, I was replaying the video SOOO many times cause i didn't understand why we wrote matrix[top][right] and not matrix[ i ][right]!! and then when i gave up and continued the video it was corrected. F in the chat

[@SpectatorAlius]

The inotro and outro music are rather goofy, but it is *so* nice to hear an algorithm explained in normal, US accent English instead of, well, you know!

[@KevinNaughtonJr]

SpectatorAlius if you like my explanations check out the interviewing service I just released thedailybyte.dev/?ref=kevin

[@vishweshthakur2234]

i think in second loop of for where list is added , it should be
nums.add(matrix[i][right]) ; in place of nums.add(matrix[top][right]) , else it will repeat 6

[@varunsadhu9060]

Hey , i guess the 2nd for loop instead of top it should be [i]

[@KevinNaughtonJr]

that's what I meant to do :/

[@kunalkavthekar3747]

hey Kevin,
great work on these problems, helped me understand a lot of patterns.
can you just link the songs that you put in your videos?
you have a great playlist!

[@Oscar-ig2gm]

I wrote the same solution)

[@davidpham6330]

Used to watch Indians teach on CZcams. Now I watch Kevin. I love you

[@KevinNaughtonJr]

thanks for the support David!

[@rohananjaria1009]

You look like Ozan Kabak from Liverpool FC

[@DaKingOfBall23]

this one doesnt work, but the one on your github does. this one works for 3x3 but not for 3*4

[@ravicrazyster]

yup, it doesn't work for 3*4

[@abhinavghosh725]

hey kevin!
what kind of a moustache is that!

[@riya6549]

so my uni wants to print a matrix in a spiral form...but the matrix is a 3D lmao

[@y.5107]

holy shit I fail doing it in 2d

[@kyle7382]

function createMatrix(n, m = n) {
let i = 1;
return new Array(m).fill(null).map(() => {
return new Array(n).fill(null).map(() => i++)
})
}
function spiralTraverseMatrix(matrix) {
const items = [];
if (!matrix.length) return items;
let top = 0;
let bottom = matrix.length - 1;
let left = 0;
let right = matrix[0].length - 1;
const size = (bottom + 1) * (right + 1);
while(
top

[@Simple_person221]

Its wrong answer, even your screen says it wrong answer, just compare output and expected output

[@bismeetsingh352]

I solved recursively: leetcode.com/problems/spiral-matrix/discuss/847626/Recursive-Solution

[@penmaniac]

There are all Indians in The Comment section 😂😂😂😂

[@kicksomeup6998]

Wow, the nums.size() check was amazing.