Name		Name	Last commit message	Last commit date
Latest commit History 1,914 Commits
.github		.github
cpp/neetcode_150		cpp/neetcode_150
csharp		csharp
go		go
java		java
javascript		javascript
kotlin		kotlin
python		python
ruby		ruby
rust		rust
scala		scala
swift		swift
typescript		typescript
.gitignore		.gitignore
1-Two-Sum.py		1-Two-Sum.py
10-Regular-Expression-Matching.py		10-Regular-Expression-Matching.py
100-Same-Tree.py		100-Same-Tree.py
102-Binary-Tree-Level-Order-Traversal.py		102-Binary-Tree-Level-Order-Traversal.py
104-Maximum-Depth-of-Binary-Tree.py		104-Maximum-Depth-of-Binary-Tree.py
1046-Last-Stone-Weight.py		1046-Last-Stone-Weight.py
105-Construct-Binary-Tree-from-Preorder-and-Inorder-Traversal.py		105-Construct-Binary-Tree-from-Preorder-and-Inorder-Traversal.py
11-Container-With-Most-Water.py		11-Container-With-Most-Water.py
110-Balanced-Binary-Tree.py		110-Balanced-Binary-Tree.py
1143-Longest-Common-Subsequence.py		1143-Longest-Common-Subsequence.py
115-Distinct-Subsequences.py		115-Distinct-Subsequences.py
12-Integer-To-Roman.py		12-Integer-To-Roman.py
121-Best-Time-To-Buy-and-Sell-Stock.py		121-Best-Time-To-Buy-and-Sell-Stock.py
1239-Maximum-Length-of-a-Concatenated-String-with-Unique-Characters.py		1239-Maximum-Length-of-a-Concatenated-String-with-Unique-Characters.py
124-Binary-Tree-Maximum-Path-Sum.py		124-Binary-Tree-Maximum-Path-Sum.py
125-Valid-Palindrome.py		125-Valid-Palindrome.py
127-Word-Ladder.py		127-Word-Ladder.py
128-Longest-consecutive-sequence.py		128-Longest-consecutive-sequence.py
13-Roman-To-Integer.py		13-Roman-To-Integer.py
130-Surrounded-Regions.py		130-Surrounded-Regions.py
131-Palindrome-Partitioning.py		131-Palindrome-Partitioning.py
133-Clone-Graph.py		133-Clone-Graph.py
134-Gas-Station.py		134-Gas-Station.py
136-Single-Number.py		136-Single-Number.py
138-Copy-List-With-Random-Pointer.py		138-Copy-List-With-Random-Pointer.py
139-Word-Break.py		139-Word-Break.py
141-Linked-List-Cycle.py		141-Linked-List-Cycle.py
143-Reorder-List.py		143-Reorder-List.py
1448-Count-Good-Nodes-in-Binary-Tree.py		1448-Count-Good-Nodes-in-Binary-Tree.py
146-LRU-Cache.py		146-LRU-Cache.py
15-3Sum.py		15-3Sum.py
150-Evaluate-Reverse-Polish-Notation.py		150-Evaluate-Reverse-Polish-Notation.py
152-Maximum-Product-Subarray.py		152-Maximum-Product-Subarray.py
153-Find-Minimum-in-Rotated-Sorted-Array.py		153-Find-Minimum-in-Rotated-Sorted-Array.py
155-Min-Stack.py		155-Min-Stack.py
1584-Min-Cost-to-Connect-all-Points.py		1584-Min-Cost-to-Connect-all-Points.py
160-Intersection-of-Two-Linked-Lists.py		160-Intersection-of-Two-Linked-Lists.py
167-Two-Sum-II.py		167-Two-Sum-II.py
17-Letter-Combinations-of-a-Phone-Number.py		17-Letter-Combinations-of-a-Phone-Number.py
1851-Minimum-Interval-to-Include-Each-Query.py		1851-Minimum-Interval-to-Include-Each-Query.py
1899-Merge-Triplets-to-Form-Target-Triplet.py		1899-Merge-Triplets-to-Form-Target-Triplet.py
19-Remove-Nth-node-from-end-of-List.py		19-Remove-Nth-node-from-end-of-List.py
190-Reverse-Bits.py		190-Reverse-Bits.py
1905-Count-Sub-Islands.py		1905-Count-Sub-Islands.py
191-Number-of-1-Bits.py		191-Number-of-1-Bits.py
198-House-Robber.py		198-House-Robber.py
199-Binary-Tree-Right-Side-View.py		199-Binary-Tree-Right-Side-View.py
2-Add-Two-Numbers.py		2-Add-Two-Numbers.py
20-Valid-Parentheses.py		20-Valid-Parentheses.py
200-Number-of-Islands.py		200-Number-of-Islands.py
2013-Detect-Squares.py		2013-Detect-Squares.py
202-Happy-Number.py		202-Happy-Number.py
206-Reverse-Linked-List.py		206-Reverse-Linked-List.py
207-Course-Schedule.py		207-Course-Schedule.py
208-Implement-Trie.py		208-Implement-Trie.py
21-Merge-Two-Sorted-Lists.py		21-Merge-Two-Sorted-Lists.py
210-Course-Schedule-II.py		210-Course-Schedule-II.py
211-Design-Add-and-Search-Words-Data-Structure.py		211-Design-Add-and-Search-Words-Data-Structure.py
212-Word-Search-II.py		212-Word-Search-II.py
213-House-Robber-II.py		213-House-Robber-II.py
215-Kth-Largest-Element-in-an-Array.py		215-Kth-Largest-Element-in-an-Array.py
217-Contains-Duplicate.py		217-Contains-Duplicate.py
22-Generate-Parentheses.py		22-Generate-Parentheses.py
221-Maximal-Square.py		221-Maximal-Square.py
226-Invert-Binary-Tree.py		226-Invert-Binary-Tree.py
23-Merge-K-Sorted-Lists.py		23-Merge-K-Sorted-Lists.py
230-Kth-Smallest-Element-in-a-BST.py		230-Kth-Smallest-Element-in-a-BST.py
236-Lowest-Common-Ancestor-of-a-Binary-Tree.py		236-Lowest-Common-Ancestor-of-a-Binary-Tree.py
238-Product-of-array-except-self.py		238-Product-of-array-except-self.py
239-Sliding-Window-Maximum.py		239-Sliding-Window-Maximum.py
24-Swap-Nodes-in-Pairs.py		24-Swap-Nodes-in-Pairs.py
242-Valid-Anagrams.py		242-Valid-Anagrams.py
25-Reverse-Nodes-in-K-Group.py		25-Reverse-Nodes-in-K-Group.py
252-Meeting-Rooms.py		252-Meeting-Rooms.py
253-Meeting-Rooms-ii.py		253-Meeting-Rooms-ii.py
26-Remove-Duplicates-from-Sorted Array.py		26-Remove-Duplicates-from-Sorted Array.py
261-Graph-Valid-Tree.py		261-Graph-Valid-Tree.py
268-Missing-Number.py		268-Missing-Number.py
27-Remove-Element.py		27-Remove-Element.py
271-Encode-and-Decode-Strings.py		271-Encode-and-Decode-Strings.py
28-Implement-strStr.py		28-Implement-strStr.py
286-Walls-and-Gates.py		286-Walls-and-Gates.py
287-Find-The-Duplicate-Number.py		287-Find-The-Duplicate-Number.py
295-Find-Median-from-Data-Stream.py		295-Find-Median-from-Data-Stream.py
297-Serialize-and-Deserialize-Binary-Tree.py		297-Serialize-and-Deserialize-Binary-Tree.py
3-Longest-Substring-Without-Repeating-Characters.py		3-Longest-Substring-Without-Repeating-Characters.py

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Leetcode solutions for NeetCode.io

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I will periodically update the neetcode.io site with new solutions for this repo!

Contributing

To contribute, please fork this repo and open a PR against main for a problem that does not yet have a solution in a given language.

Solutions needed (will be linked from NeetCode.io):

Java
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Solutions are also welcome for any other supported language on leetcode.com!

In order to get your PR reviewed as quickly as possible, please:

adhere to existing naming conventions for files/directories
prefer adding only one solution per PR (not a hard and fast rule, but will typically make the review cycle shorter)
ensure your code is consistently formatted according to the language you're writing in (there are free online formatters: formatter.org and textmagic to name a few)
ensure your code passes submission on leetcode.com

Complete:

Python
C++

Please feel free to open a pull request to add solutions in other languages for the Neetcode 150 problem list. If you would like to have collaborator permissions on the repo to merge your own PRs or review others' PRs please let me know.

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