LONGEST CONSECUTIVE SEQUENCE (Leetcode) [Python] - Code & Whiteboard

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A linear, super easy-to-understand solution to Leetcode's Hard problem #128 - Longest Consecutive Subsequence.

Let me know what you want to see next, or if you have any questions about this one! :)

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thanks man for this type of solution, rest on different sites have very hard to understand code solution i almost gave up when i found yours.

DivitMukhi

man, your explanations are always so elegant. thank you, keep up the great work.

dhruvmohapatra

Vo bro, you were so easy to understand, I have my interview tomorrow, thnx alot!!.

Aryansingh-fkhy

Very elegant solution ! I was struggling to understand why implement it in hashtables and found you video

mohammedfahadnyc

I comprehended 101% of what you said.Keep up the good work.

tombrady

if u use a priority queue and a hashset its alot easier to digest imo, thats how i solved it. But this is also a great solution :)

allaboutthementality

Thanks once again, this may be the easiest hard problem..

JohnDoe

I am a bit lost. Suppose nums = [1, 2, 3, 4, 5, 100]. Now num will take 1 and then go all the way to 5 to get count = 5. Next num will be 2 and then again go all the way up to 5 to get 4. Then we take 3 which will also go all the way upto 5. So is this not O(n^2)

utkarshkumar

hi thanks for the great explanation.
why the complexity is O(n) where we have while inside the for?

Rolahd

But if there are two nested loops then how is this a O(N) complexity

mayurkalsekar

Thanks for the solution, is it O(n) solution.?

krishnanduranjnroy

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