LeetCode Solutions

Welcome to a robust and versatile repository of LeetCode solutions! This repository is a treasure trove for coding enthusiasts, educators, students, and professionals who are preparing for technical interviews or enhancing their coding skills.

What You'll Find Here

• Wide Range of Problems: Our collection includes an extensive range of LeetCode problems, covering various topics and difficulty levels – from Easy to Hard.
• Multi-Language Support: We offer solutions in several programming languages, including Python, C++, JavaScript, SQL, and TypeScript, catering to a diverse coding community.
• Organized and Accessible: Each solution is meticulously organized by difficulty and language, making it easy to navigate and find what you need.
• In-Depth Explanations: You'll find README files in each problem folder with detailed explanations of the problem, the approach taken, and a thorough walkthrough of the solution.

Statistics

Folder Structure

The solutions are organized as follows:

• Difficulty: Problems are categorized into Easy, Medium, and Hard.
• Languages: Solutions are available in multiple programming languages, including Python, C++, JavaScript, SQL, and TypeScript.
• Problem Titles: Each problem is named after its LeetCode title.

Question List

#	Title	Solution	Difficulty & ReadMe
0001	Two Sum	Python	Easy
0002	Add Two Numbers	Python, C++	Medium
0003	Longest Substring Without Repeating Characters	Python	Medium
0004	Median of Two Sorted Arrays	Python	Hard
0005	Longest Palindromic Substring	Python	Medium
0006	ZigZag Conversion	Python	Medium
0007	Reverse Integer	Python	Medium
0008	String to Integer (atoi)	Python	Medium
0009	Palindrome Number	C++	Easy
0010	Regular Expression Matching	Python	Hard
0011	Container With Most Water	Python	Medium
0012	Integer to Roman	Python	Medium
0013	Roman to Integer	C++	Easy
0014	Longest Common Prefix	Python, C++	Easy
0015	3Sum	Python	Medium
0016	3Sum Closest	Python	Medium
0017	Letter Combinations of a Phone Number	Python	Medium
0018	4Sum	Python	Medium
0019	Remove Nth Node From End of List	Python	Medium
0020	Valid Parentheses	Python	Easy
0021	Merge Two Sorted Lists	Python	Easy
0022	Generate Parentheses	Python	Medium
0023	Merge k Sorted Lists	Python	Hard
0024	Swap Nodes in Pairs	Python	Medium
0025	Reverse Nodes in k-Group	Python	Hard
0026	Remove Duplicates from Sorted Array	Python	Easy
0027	Remove Element	Python	Easy
0028	Implement strStr()	Python	Easy
0029	Divide Two Integers	Python	Medium
0030	Substring with Concatenation of All Words	Python	Hard
0031	Next Permutation	Python	Medium
0032	Longest Valid Parentheses	Python	Hard
0033	Search in Rotated Sorted Array	Python	Medium
0034	Find First and Last Position of Element in Sorted Array	Python	Medium
0035	Search Insert Position	Python	Easy
0036	Valid Sudoku	Python	Medium
0037	Sudoku Solver	Python	Hard
0038	Count and Say	Python	Medium
0039	Combination Sum	Python	Medium
0040	Combination Sum II	Python	Medium
0041	First Missing Positive	Python	Hard
0042	Trapping Rain Water	Python	Hard
0043	Multiply Strings	Python	Medium
0045	Jump Game II	C++	Hard
0046	Permutations	Python, C++	Medium
0047	Permutations II	Python	Medium
0048	Rotate Image	Python, C++	Medium
0049	Group Anagrams	Python	Medium
0050	Pow(x, n)	Python	Medium
0051	N Queens	Python	Hard
0052	N Queens II	Python	Hard
0053	Maximum Subarray	Python	Easy
0054	Spiral Matrix	Python	Medium
0055	Jump Game	Python, C++	Medium
0056	Merge Intervals	Python	Medium
0057	Insert Interval	Python	Hard
0058	Length of Last Word	Python	Easy
0059	Spiral Matrix II	Python, C++	Medium
0061	Rotate List	Python	Medium
0062	Unique Paths	Python	Medium
0063	Unique Paths II	Python	Medium
0064	Minimum Path Sum	Python	Medium
0066	Plus One	Python	Easy
0067	Add Binary	Python	Easy
0068	Text Justification	Python	Hard
0069	Sqrt(x)	Python	Easy
0070	Climbing Stairs	Python	Easy
0071	Simplify Path	Python	Medium
0072	Edit Distance	Python	Medium
0073	Set Matrix Zeroes	Python	Medium
0074	Search a 2D Matrix	Python	Medium
0075	Sort Colors	Python	Medium
0076	Minimum Window Substring	Python	Hard
0077	Combinations	Python	Medium
0078	Subsets	Python	Medium
0079	Word Search	Python	Medium
0080	Remove Duplicates from Sorted Array II	Python	Medium
0081	Search in Rotated Sorted Array II	Python	Medium
0082	Remove Duplicates from Sorted List II	Python	Medium
0083	Remove Duplicates from Sorted List	C++	Easy
0084	Largest Rectangle in Histogram	Python	Hard
0085	Maximal Rectangle	Python	Hard
0086	Partition List	Python	Medium
0088	Merge Sorted Array	Python, C++	Easy
0089	Gray Code	Python	Medium
0090	Subsets II	Python	Medium
0091	Decode Ways	Python	Medium
0092	Reverse Linked List II	Python	Medium
0093	Restore IP Addresses	Python	Medium
0094	Binary Tree Inorder Traversal	Python	Easy
0095	Unique Binary Search Trees II	Python	Medium
0096	Unique Binary Search Trees	Python	Medium
0097	Interleaving String	Python	Medium
0098	Validate Binary Search Tree	Python	Medium
0099	Recover Binary Search Tree	Python	Medium
0100	Same Tree	Python	Easy
0101	Symmetric Tree	Python, C++	Easy
0102	Binary Tree Level Order Traversal	Python	Medium
0103	Binary Tree Zigzag Level Order Traversal	Python	Medium
0104	Maximum Depth of Binary Tree	Python	Easy
0105	Construct Binary Tree from Preorder and Inorder Traversal	Python	Medium
0106	Construct Binary Tree from Inorder and Postorder Traversal	Python	Medium
0108	Convert Sorted Array to Binary Search Tree	Python	Easy
0110	Balanced Binary Tree	Python	Easy
0111	Minimum Depth of Binary Tree	Python	Easy
0112	Path Sum	Python	Easy
0113	Path Sum II	Python	Medium
0114	Flatten Binary Tree to Linked List	Python	Medium
0115	Distinct Subsequences	Python	Hard
0116	Populating Next Right Pointers in Each Node	Python, C++	Medium
0117	Populating Next Right Pointers in Each Node II	Python	Medium
0118	Pascal's Triangle	Python	Easy
0119	Pascal's Triangle II	Python	Easy
0120	Triangle	Python	Medium
0121	Best Time to Buy and Sell Stock	Python	Easy
0122	Best Time to Buy and Sell Stock II	Python	Medium
0123	Best Time to Buy and Sell Stock III	Python	Hard
0124	Binary Tree Maximum Path Sum	Python	Medium
0125	Valid Palindrome	Python	Easy
0127	Word Ladder	Python	Medium
0128	Longest Consecutive Sequence	Python	Hard
0129	Sum Root to Leaf Numbers	Python	Medium
0130	Surrounded Regions	Python	Medium
0131	Palindrome Partitioning	Python	Medium
0133	Clone Graph	Python	Medium
0134	Gas Station	Python	Medium
0135	Candy	Python	Hard
0136	Single Number	Python	Easy
0137	Single Number II	Python	Medium
0138	Copy List with Random Pointer	Python	Medium
0139	Word Break	Python	Medium
0140	Word Break II	Python	Hard
0141	Linked List Cycle	Python	Easy
0142	Linked List Cycle II	Python	Medium
0143	Reorder List	Python	Medium
0144	Binary Tree Preorder Traversal	Python	Easy
0145	Binary Tree Postorder Traversal	Python	Easy
0146	LRU Cache	Python	Medium
0148	Sort List	Python	Medium
0149	Max Points on a Line	Python	Hard
0150	Evaluate Reverse Polish Notation	Python	Medium
0151	Reverse Words in a String	Python	Medium
0152	Maximum Product Subarray	Python	Medium
0153	Find Minimum in Rotated Sorted Array	Python	Medium
0155	Min Stack	Python	Easy
0159	Longest Substring with At Most Two Distinct Characters	Python	Medium
0160	Intersection of Two Linked Lists	Python	Easy
0162	Find Peak Element	Python	Medium
0165	Compare Version Numbers	Python	Medium
0166	Fraction to Recurring Decimal	Python	Medium
0167	Two Sum II - Input array is sorted	Python	Easy
0168	Excel Sheet Column Title	Python	Easy
0169	Majority Element	Python	Easy
0170	Two Sum III - Data structure design	Python	Easy
0172	Factorial Trailing Zeroes	Python	Medium
0173	Binary Search Tree Iterator	Python	Medium
0179	Largest Number	Python	Medium
0188	Best Time to Buy and Sell Stock IV	Python	Hard
0189	Rotate Array	C++	Medium
0190	Reverse Bits	Python, C++	Easy
0191	Number of 1 Bits	Python	Easy
0198	House Robber	Python	Easy
0199	Binary Tree Right Side View	Python	Medium
0200	Number of Islands	Python	Medium
0201	Bitwise AND of Numbers Range	Python	Medium
0202	Happy Number	Python	Easy
0203	Remove Linked List Elements	Python, C++	Easy
0205	Isomorphic Strings	Python	Easy
0206	Reverse Linked List	Python	Easy
0207	Course Schedule	Python	Medium
0208	Implement Trie (Prefix Tree)	Python	Medium
0209	Minimum Size Subarray Sum	Python	Medium
0210	Course Schedule II	Python	Medium
0211	Design Add and Search Words Data Structure	Python	Medium
0212	Word Search II	Python	Hard
0213	House Robber II	Python, C++	Medium
0214	Shortest Palindrome	Python	Hard
0215	Kth Largest Element in an Array	Python	Medium
0216	Combination Sum III	Python	Medium
0217	Contains Duplicate	Python	Easy
0218	The Skyline Problem	Python	Hard
0219	Contains Duplicate II	Python	Easy
0221	Maximal Square	Python	Medium
0222	Count Complete Tree Nodes	Python	Easy
0224	Basic Calculator	Python	Hard
0225	Implement Stack using Queues	Python	Easy
0226	Invert Binary Tree	Python	Easy
0227	Basic Calculator II	Python	Medium
0228	Summary Ranges	Python	Easy
0229	Majority Element II	Python	Medium
0230	Kth Smallest Element in a BST	Python	Medium
0231	Power of Two	C++	Easy
0232	Implement Queue using Stacks	Python	Easy
0234	Palindrome Linked List	Python	Easy
0235	Lowest Common Ancestor of a Binary Search Tree	Python	Easy
0236	Lowest Common Ancestor of a Binary Tree	Python	Medium
0237	Delete Node in a Linked List	Python	Medium
0238	Product of Array Except Self	Python	Medium
0239	Sliding Window Maximum	Python	Hard
0240	Search a 2D Matrix II	Python	Medium
0241	Different Ways to Add Parentheses	Python	Medium
0242	Valid Anagram	Python	Easy
0244	Shortest Word Distance II	Python	Medium
0246	Strobogrammatic Number	Python	Easy
0249	Group Shifted Strings	Python	Medium
0252	Meeting Rooms	Python	Easy
0253	Meeting Rooms II	Python	Medium
0255	Verify Preorder Sequence in Binary Search Tree	Python	Medium
0256	Paint House	Python	Medium
0257	Binary Tree Paths	Python	Easy
0259	3Sum Smaller	Python	Medium
0260	Single Number III	Python	Medium
0261	Graph Valid Tree	Python	Medium
0263	Ugly Number	Python	Easy
0264	Ugly Number II	Python	Medium
0265	Paint House II	Python	Hard
0266	Palindrome Permutation	Python	Easy
0268	Missing Number	Python	Easy
0269	Alien Dictionary	Python	Hard
0271	Encode and Decode Strings	Python	Medium
0273	Integer to English Words	Python	Hard
0274	H-Index	Python	Medium
0276	Paint Fence	Python	Medium
0277	Find the Celebrity	Python	Medium
0278	First Bad Version	Python	Easy
0279	Perfect Squares	Python	Medium
0283	Move Zeroes	C++	Easy
0285	Inorder Successor in BST	Python	Medium
0286	Walls and Gates	Python	Medium
0287	Find the Duplicate Number	Python	Medium
0290	Word Pattern	Python	Easy
0291	Word Pattern II	Python	Medium
0293	Flip Game	Python	Easy
0295	Find Median from Data Stream	Python	Hard
0296	Best Meeting Point	Python	Hard
0297	Serialize and Deserialize Binary Tree	Python	Hard
0299	Bulls and Cows	Python	Medium
0300	Longest Increasing Subsequence	Python	Medium
0302	Smallest Rectangle Enclosing Black Pixels	Python	Hard
0303	Range Sum Query - Immutable	Python	Easy
0304	Range Sum Query 2D - Immutable	Python	Medium
0305	Number of Islands II	Python	Hard
0307	Range Sum Query - Mutable	Python	Medium
0309	Best Time to Buy and Sell Stock with Cooldown	Python	Medium
0310	Minimum Height Trees	Python	Medium
0312	Burst Balloons	Python	Hard
0316	Remove Duplicate Letters	Python	Hard
0320	Generalized Abbreviation	Python	Medium
0322	Coin Change	Python	Medium
0323	Number of Connected Components in an Undirected Graph	Python	Medium
0328	Odd Even Linked List	Python	Medium
0329	Longest Increasing Path in a Matrix	Python	Hard
0330	Patching Array	Python	Hard
0332	Reconstruct Itinerary	Python	Medium
0334	Increasing Triplet Subsequence	Python	Medium
0337	House Robber III	Python	Medium
0338	Counting Bits	Python	Medium
0340	Longest Substring with At Most K Distinct Characters	Python	Medium
0341	Flatten Nested List Iterator	Python	Medium
0342	Power of Four	Python	Easy
0343	Integer Break	Python	Medium
0344	Reverse String	Python	Easy
0345	Reverse Vowels of a String	Python	Easy
0346	Moving Average from Data Stream	Python	Easy
0347	Top K Frequent Elements	Python	Medium
0348	Design Tic-Tac-Toe	Python	Medium
0349	Intersection of Two Arrays	Python	Easy
0350	Intersection of Two Arrays II	Python	Easy
0351	Android Unlock Patterns	Python	Medium
0354	Russian Doll Envelopes	Python	Hard
0355	Design Twitter	Python	Medium
0358	Rearrange String k Distance Apart	Python	Hard
0359	Logger Rate Limiter	Python	Easy
0362	Design Hit Counter	Python	Medium
0364	Nested List Weight Sum II	Python	Medium
0366	Find Leaves of Binary Tree	Python	Medium
0368	Largest Divisible Subset	Python	Medium
0371	Sum of Two Integers	Python	Medium
0373	Find K Pairs with Smallest Sums	Python	Medium
0374	Guess Number Higher or Lower	Python	Easy
0377	Combination Sum IV	Python	Medium
0378	Kth Smallest Element in a Sorted Matrix	Python	Medium
0380	Insert Delete GetRandom O(1)	Python	Medium
0383	Ransom Note	Python	Easy
0386	Lexicographical Numbers	Python	Medium
0387	First Unique Character in a String	Python	Easy
0388	Longest Absolute File Path	Python	Medium
0389	Find the Difference	Python	Easy
0390	Elimination Game	Python	Medium
0391	Perfect Rectangle	Python	Hard
0392	Is Subsequence	Python	Easy
0393	UTF-8 Validation	Python	Medium
0394	Decode String	Python	Medium
0395	Longest Substring with At Least K Repeating Characters	Python	Medium
0396	Rotate Function	Python	Medium
0397	Integer Replacement	Python	Medium
0398	Random Pick Index	Python	Medium
0399	Evaluate Division	Python	Medium
0400	Nth Digit	Python	Medium
0401	Binary Watch	Python	Easy
0402	Remove K Digits	Python	Medium
0403	Frog Jump	Python	Hard
0404	Sum of Left Leaves	Python	Easy
0405	Convert a Number to Hexadecimal	Python	Easy
0406	Queue Reconstruction by Height	Python	Medium
0407	Trapping Rain Water II	Python	Hard
0408	Valid Word Abbreviation	Python	Easy
0409	Longest Palindrome	Python	Easy
0410	Split Array Largest Sum	Python	Hard
0414	Third Maximum Number	Python	Easy
0416	Partition Equal Subset Sum	Python	Medium
0417	Pacific Atlantic Water Flow	Python	Medium
0424	Longest Repeating Character Replacement	Python	Medium
0426	Convert Binary Search Tree to Sorted Doubly Linked List	Python	Medium
0427	Construct Quad Tree	Python	Medium
0432	All O`one Data Structure	Python	Hard
0433	Minimum Genetic Mutation	Python	Medium
0435	Non-overlapping Intervals	Python	Medium
0436	Find Right Interval	Python	Medium
0437	Path Sum III	Python	Medium
0438	Find All Anagrams in a String	Python	Medium
0439	Ternary Expression Parser	Python	Medium
0440	K-th Smallest in Lexicographical Order	Python	Hard
0442	Find All Duplicates in an Array	Python	Medium
0443	String Compression	Python	Medium
0446	Arithmetic Slices II - Subsequence	Python	Hard
0450	Delete Node in a BST	Python	Medium
0451	Sort Characters By Frequency	Python	Medium
0452	Minimum Number of Arrows to Burst Balloons	Python	Medium
0455	Assign Cookies	Python	Easy
0456	132 Pattern	Python	Medium
0457	Circular Array Loop	Python	Medium
0458	Poor Pigs	Python	Hard
0459	Repeated Substring Pattern	Python	Easy
0463	Island Perimeter	Python	Easy
0465	Optimal Account Balancing	Python	Hard
0473	Matchsticks to Square	Python	Medium
0476	Number Complement	Python	Easy
0480	Sliding Window Median	Python	Hard
0486	Predict the Winner	Python	Medium
0487	Max Consecutive Ones II	Python	Medium
0489	Robot Room Cleaner	Python	Hard
0490	The Maze	Python	Medium
0494	Target Sum	Python	Medium
0496	Next Greater Element I	Python	Easy
0498	Diagonal Traverse	Python	Medium
0501	Find Mode in Binary Search Tree	Python	Easy
0502	IPO	Python	Hard
0505	The Maze II	Python	Medium
0506	Relative Ranks	Python	Easy
0509	Fibonacci Number	Python	Easy
0513	Find Bottom Left Tree Value	Python	Medium
0514	Freedom Trail	Python	Hard
0515	Find Largest Value in Each Tree Row	Python	Medium
0516	Longest Palindromic Subsequence	Python	Medium
0518	Coin Change 2	Python	Medium
0523	Continuous Subarray Sum	Python	Medium
0525	Contiguous Array	Python	Medium
0528	Random Pick with Weight	Python	Medium
0530	Minimum Absolute Difference in BST	Python	Easy
0532	K-diff Pairs in an Array	Python	Easy
0539	Minimum Time Difference	Python	Medium
0540	Single Element in a Sorted Array	Python	Medium
0542	01 Matrix	Python	Medium
0543	Diameter of Binary Tree	Python	Easy
0545	Boundary of Binary Tree	Python	Medium
0547	Number of Provinces	Python	Medium
0552	Student Attendance Record II	Python	Hard
0557	Reverse Words in a String III	C++	Easy
0560	Subarray Sum Equals K	Python	Medium
0561	Array Partition I	Python	Easy
0564	Find the Closest Palindrome	Python	Hard
0566	Reshape the Matrix	C++	Easy
0567	Permutation in String	Python	Medium
0570	Managers with at Least 5 Direct Reports	SQL	Medium
0572	Subtree of Another Tree	Python	Easy
0573	Squirrel Simulation	Python	Medium
0576	Out of Boundary Paths	Python	Medium
0577	Employee Bonus	SQL	Easy
0584	Find Customer Referee	SQL	Easy
0588	Design In-Memory File System	Python	Hard
0590	N-ary Tree Postorder Traversal	Python	Easy
0592	Fraction Addition and Subtraction	Python	Medium
0595	Big Countries	SQL	Easy
0605	Can Place Flowers	Python	Easy
0606	Construct String from Binary Tree	Python	Easy
0609	Find Duplicate File in System	Python	Medium
0617	Merge Two Binary Trees	C++	Easy
0620	Not Boring Movies	SQL	Easy
0621	Task Scheduler	Python	Medium
0623	Add One Row to Tree	Python	Medium
0624	Maximum Distance in Arrays	Python	Easy
0629	K Inverse Pairs Array	Python	Hard
0632	Smallest Range Covering Elements from K Lists	Python	Hard
0633	Sum of Square Numbers	Python	Medium
0636	Exclusive Time of Functions	Python	Medium
0637	Average of Levels in Binary Tree	Python	Easy
0641	Design Circular Deque	Python	Medium
0643	Maximum Average Subarray I	Python	Easy
0645	Set Mismatch	Python	Easy
0646	Maximum Length of Pair Chain	Python	Medium
0647	Palindromic Substrings	Python	Medium
0648	Replace Words	Python	Medium
0649	Dota2 Senate	Python	Medium
0650	2 Keys Keyboard	Python	Medium
0653	Two Sum IV - Input is a BST	Python, C++	Easy
0658	Find K Closest Elements	Python	Medium
0661	Image Smoother	Python	Easy
0662	Maximum Width of Binary Tree	Python	Medium
0664	Strange Printer	Python	Hard
0666	Path Sum IV	Python	Medium
0670	Maximum Swap	Python	Medium
0678	Valid Parenthesis String	Python	Medium
0680	Valid Palindrome II	Python	Easy
0684	Redundant Connection	Python	Medium
0689	Maximum Sum of 3 Non-Overlapping Subarrays	Python	Hard
0692	Top K Frequent Words	Python	Medium
0694	Number of Distinct Islands	Python	Medium
0695	Max Area of Island	C++	Medium
0700	Search in a Binary Search Tree	C++	Easy
0701	Insert into a Binary Search Tree	C++	Medium
0703	Kth Largest Element in a Stream	Python	Easy
0704	Binary Search	Pythoon	Easy
0705	Design HashSet	Python	Easy
0706	Design HashMap	Python	Easy
0712	Minimum ASCII Delete Sum for Two Strings	Python	Medium
0713	Subarray Product Less Than K	Python	Medium
0714	Best Time to Buy and Sell Stock with Transaction Fee	Python	Medium
0715	Range Module	Python	Hard
0716	Max Stack	Python	Hard
0718	Maximum Length of Repeated Subarray	Python	Medium
0719	Find K-th Smallest Pair Distance	Python	Hard
0721	Accounts Merge	Python	Medium
0723	Candy Crush	Python	Medium
0724	Find Pivot Index	Python	Easy
0725	Split Linked List in Parts	Python	Medium
0726	Number of Atoms	Python	Hard
0727	Minimum Window Subsequence	Python	Hard
0729	My Calendar I	Python	Medium
0731	My Calendar II	Python	Medium
0733	Flood Fill	Python	Easy
0734	Sentence Similarity	Python	Easy
0735	Asteroid Collision	Python	Medium
0737	Sentence Similarity II	Python	Medium
0739	Daily Temperatures	Python	Medium
0740	Delete and Earn	Python	Medium
0741	Cherry Pickup	Python	Hard
0743	Network Delay Time	Python	Medium
0744	Find Smallest Letter Greater Than Target	Python	Easy
0746	Min Cost Climbing Stairs	Python	Easy
0752	Open the Lock	Python	Medium
0759	Employee Free Time	Python	Hard
0767	Reorganize String	Python	Medium
0769	Max Chunks To Make Sorted	Python	Medium
0773	Sliding Puzzle	Python	Hard
0776	Split BST	Python	Medium
0778	Swim in Rising Water	Python	Hard
0779	K-th Symbol in Grammar	Python	Medium
0784	Letter Case Permutation	C++	Medium
0786	K-th Smallest Prime Fraction	Python	Medium
0787	Cheapest Flights Within K Stops	Python	Medium
0790	Domino and Tromino Tiling	Python	Medium
0791	Custom Sort String	Python	Medium
0797	All Paths From Source to Target	Python	Medium
0799	Champagne Tower	Python	Medium
0802	Find Eventual Safe States	Python	Medium
0807	Max Increase to Keep City Skyline	Python	Medium
0808	Soup Servings	Python	Medium
0814	Binary Tree Pruning	Python	Medium
0815	Bus Routes	Python	Hard
0823	Binary Trees With Factors	Python	Medium
0826	Most Profit Assigning Work	Python	Medium
0827	Making A Large Island	Python	Hard
0832	Flipping an Image	Python	Easy
0834	Sum of Distances in Tree	Python	Hard
0840	Magic Squares In Grid	Python	Medium
0841	Keys and Rooms	Python	Medium
0844	Backspace String Compare	Python	Easy
0846	Hand of Straights	Python	Medium
0847	Shortest Path Visiting All Nodes	Python	Hard
0851	Loud and Rich	Python	Medium
0852	Peak Index in a Mountain Array	Python	Easy
0857	Minimum Cost to Hire K Workers	Python	Hard
0860	Lemonade Change	Python	Easy
0861	Score After Flipping Matrix	Python	Medium
0862	Shortest Subarray with Sum at Least K	Python	Hard
0863	All Nodes Distance K in Binary Tree	Python	Medium
0867	Transpose Matrix	Python	Easy
0871	Minimum Number of Refueling Stops	Python	Hard
0872	Leaf-Similar Trees	Python	Easy
0874	Walking Robot Simulation	Python	Medium
0875	Koko Eating Bananas	Python	Medium
0876	Middle of the Linked List	Python	Easy
0880	Decoded String at Index	Python	Medium
0881	Boats to Save People	Python	Medium
0884	Uncommon Words from Two Sentences	Python	Easy
0885	Spiral Matrix III	Python	Medium
0888	Fair Candy Swap	Python	Easy
0889	Construct Binary Tree from Preorder and Postorder Traversal	Python	Medium
0894	All Possible Full Binary Trees	Python	Medium
0895	Maximum Frequency Stack	Python	Hard
0896	Monotonic Array	Python	Easy
0901	Online Stock Span	Python	Medium
0904	Fruit Into Baskets	Python	Medium
0905	Sort Array By Parity	Python	Easy
0907	Sum of Subarray Minimums	Python	Medium
0909	Snakes and Ladders	Python	Medium
0912	Sort an Array	Python	Medium
0916	Word Subsets	Python	Medium
0918	Maximum Sum Circular Subarray	Python	Medium
0920	Number of Music Playlists	Python	Hard
0921	Minimum Add to Make Parentheses Valid	Python	Medium
0924	Minimize Malware Spread	Python	Hard
0930	Binary Subarrays With Sum	Python	Medium
0931	Minimum Falling Path Sum	Python	Medium
0933	Number of Recent Calls	Python	Easy
0934	Shortest Bridge	Python	Medium
0935	Knight Dialer	Python	Medium
0938	Range Sum of BST	Python	Easy
0939	Minimum Area Rectangle	Python	Medium
0945	Minimum Increment to Make Array Unique	Python	Medium
0947	Most Stones Removed with Same Row or Column	Python	Medium
0948	Bag of Tokens	Python	Medium
0950	Reveal Cards In Increasing Order	Python	Medium
0951	Flip Equivalent Binary Trees	Python	Medium
0958	Check Completeness of a Binary Tree	Python	Medium
0959	Regions Cut By Slashes	Python	Medium
0962	Maximum Width Ramp	Python	Medium
0973	K Closest Points to Origin	Python	Medium
0974	Subarray Sums Divisible by K	Python	Medium
0977	Squares of a Sorted Array	Python	Easy
0978	Longest Turbulent Subarray	Python	Medium
0979	Distribute Coins in Binary Tree	Python	Medium
0981	Time Based Key-Value Store	Python	Medium
0983	Minimum Cost for Tickets	Python	Medium
0986	Interval List Intersections	Python	Medium
0987	Vertical Order Traversal of a Binary Tree	Python	Medium
0988	Smallest String Starting From Leaf	Python	Medium
0992	Subarrays with K Different Integers	Python	Hard
0993	Cousins in Binary Tree	Python	Easy
0994	Rotting Oranges	Python	Medium
0995	Minimum Number of K Consecutive Bit Flips	Python	Hard
0997	Find the Town Judge	Python	Easy
1002	Find Common Characters	Python	Easy
1004	Max Consecutive Ones III	Python	Medium
1009	Complement of Base 10 Integer	Python	Easy
1010	Pairs of Songs With Total Durations Divisible by 60	Python	Medium
1011	Capacity To Ship Packages Within D Days	Python	Medium
1014	Best Sightseeing Pair	Python	Medium
1026	Maximum Difference Between Node and Ancestor	Python	Medium
1028	Recover a Tree From Preorder Traversal	Python	Hard
1029	Two City Scheduling	Python	Medium
1038	Binary Search Tree to Greater Sum Tree	Python	Medium
1043	Partition Array for Maximum Sum	Python	Medium
1046	Last Stone Weight	Python	Easy
1047	Remove All Adjacent Duplicates in String	Python	Easy
1048	Longest String Chain	Python	Medium
1051	Height Checker	Python	Easy
1052	Grumpy Bookstore Owner	Python	Medium
1057	Campus Bikes	Python	Medium
1060	Missing Element in Sorted Array	Python	Medium
1062	Longest Repeating Substring	Python	Medium
1063	Number of Valid Subarrays	Python	Hard
1065	Index Pairs of a String	Python	Easy
1066	Campus Bikes II	Python	Medium
1068	Product Sales Analysis I	SQL	Easy
1071	Greatest Common Divisor of Strings	Python	Easy
1072	Flip Columns For Maximum Number of Equal Rows	Python	Medium
1074	Number of Submatrices That Sum to Target	Python	Hard
1075	Project Employees I	SQL	Easy
1079	Letter Tile Possibilities	Python	Medium
1086	High Five	Python	Easy
1091	Shortest Path in Binary Matrix	Python	Medium
1092	Shortest Common Supersequence	Python	Hard
1095	Find in Mountain Array	Python	Hard
1099	Two Sum Less Than K	Python	Easy
1100	Find K-Length Substrings With No Repeated Characters	Python	Medium
1101	The Earliest Moment When Everyone Become Friends	Python	Medium
1105	Filling Bookcase Shelves	Python	Medium
1106	Parsing A Boolean Expression	Python	Hard
1110	Delete Nodes And Return Forest	Python	Medium
1119	Remove Vowels from a String	Python	Easy
1120	Maximum Average Subtree	Python	Medium
1122	Relative Sort Array	Python	Easy
1133	Largest Unique Number	Python	Easy
1136	Parallel Courses	Python	Hard
1137	N-th Tribonacci Number	Python	Easy
1140	Stone Game II	Python	Medium
1143	Longest Common Subsequence	Python	Medium
1146	Snapshot Array	Python	Medium
1148	Article Views I	SQL	Easy
1151	Minimum Swaps to Group All 1's Together	Python	Medium
1152	Analyze User Website Visit Pattern	Python	Medium
1155	Number of Dice Rolls With Target Sum	Python	Medium
1160	Find Words That Can Be Formed by Characters	Python	Easy
1161	Maximum Level Sum of a Binary Tree	Python	Medium
1165	Single Row Keyboard	Python	Easy
1166	Design File System	Python	Medium
1167	Minimum Cost to Connect Sticks	Python	Medium
1168	Optimize Water Distribution in a Village	Python	Hard
1171	Remove Zero Sum Consecutive Nodes from Linked List	Python	Medium
1176	Diet Plan Performance	Python	Easy
1183	Maximum Number of Ones	Python	Hard
1190	Reverse Substrings Between Each Pair of Parentheses	Python	Medium
1197	Minimum Knight Moves	Python	Medium
1198	Find Smallest Common Element in All Rows	Python	Medium
1199	Minimum Time to Build Blocks	Python	Hard
1202	Smallest String With Swaps	Python	Medium
1203	Sort Items by Groups Respecting Dependencies	Python	Hard
1207	Unique Number of Occurrences	Python	Easy
1208	Get Equal Substrings Within Budget	Python	Medium
1209	Remove All Adjacent Duplicates in String II	Python	Medium
1214	Two Sum BSTs	Python	Medium
1216	Valid Palindrome III	Python	Hard
1219	Path with Maximum Gold	Python	Medium
1220	Count Vowels Permutation	Python	Hard
1222	Queens That Can Attack the King	Python	Medium
1230	Toss Strange Coins	Python	Medium
1233	Remove Sub-Folders from the Filesystem	Python	Medium
1235	Maximum Profit in Job Scheduling	Python	Hard
1239	Maximum Length of a Concatenated String with Unique Characters	Python	Medium
1245	Tree Diameter	Python	Medium
1248	Count Number of Nice Subarrays	Python	Medium
1249	Minimum Remove to Make Valid Parentheses	Python	Medium
1251	Average Selling Price	SQL	Easy
1254	Number of Closed Islands	Python	Medium
1255	Maximum Score Words Formed by Letters	Python	Hard
1257	Smallest Common Region	Python	Medium
1261	Find Elements in a Contaminated Binary Tree	Python	Medium
1265	Print Immutable Linked List in Reverse	C++	Medium
1266	Minimum Time Visiting All Points	Python	Easy
1267	Count Servers that Communicate	Python	Medium
1268	Search Suggestions System	Python	Medium
1269	Number of Ways to Stay in the Same Place After Some Steps	Python	Hard
1272	Remove Interval	Python	Medium
1276	Number of Burgers with No Waste of Ingredients	Python	Medium
1277	Count Square Submatrices with All Ones	Python	Medium
1280	Students and Examinations	SQL	Easy
1282	Group the People Given the Group Size They Belong To	Python	Medium
1287	Element Appearing More Than 25% In Sorted Array	Python	Easy
1288	Remove Covered Intervals	Python	Medium
1289	Minimum Falling Path Sum II	Python	Hard
1291	Sequential Digits	Python	Medium
1300	Sum of Mutated Array Closest to Target	Python	Medium
1302	Deepest Leaves Sum	Python	Medium
1305	All Elements in Two Binary Search Trees	Python	Medium
1306	Jump Game III	Python	Medium
1310	XOR Queries of a Subarray	Python	Medium
1318	Minimum Flips to Make A or B Equal to C	Python	Medium
1324	Print Words Vertically	Python	Medium
1325	Delete Leaves With a Given Value	Python	Medium
1326	Minimum Number of Taps to Open to Water a Garden	Python	Hard
1331	Rank Transform of an Array	Python	Easy
1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	Python	Medium
1335	Minimum Difficulty of a Job Schedule	Python	Hard
1337	The K Weakest Rows in a Matrix	Python	Easy
1338	Reduce Array Size to The Half	Python	Medium
1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	Python	Medium
1346	Check If N and Its Double Exist	Python	Easy
1347	Minimum Number of Steps to Make Two Strings Anagram	Python	Medium
1351	Count Negative Numbers in a Sorted Matrix	Python	Easy
1352	Product of the Last K Numbers	Python	Medium
1356	Sort Integers by The Number of 1 Bits	Python	Easy
1359	Count All Valid Pickup and Delivery Options	Python	Hard
1360	Number of Days Between Two Dates	Python	Easy
1361	Validate Binary Tree Nodes	Python	Medium
1366	Rank Teams by Votes	Python	Medium
1367	Linked List in Binary Tree	Python	Medium
1368	Minimum Cost to Make at Least One Valid Path in a Grid	Python	Hard
1371	Find the Longest Substring Containing Vowels in Even Counts	Python	Medium
1372	Longest ZigZag Path in a Binary Tree	Python	Medium
1378	Replace Employee ID With The Unique Identifier	SQL	Easy
1380	Lucky Numbers in a Matrix	Python	Easy
1381	Design a Stack With Increment Operation	Python	Medium
1382	Balance a Binary Search Tree	Python	Medium
1385	Find the Distance Value Between Two Arrays	Python	Easy
1395	Count Number of Teams	Python	Medium
1400	Construct K Palindrome Strings	Python	Medium
1404	Number of Steps to Reduce a Number in Binary Representation to One	Python	Medium
1405	Longest Happy String	Python	Medium
1408	String Matching in an Array	Python	Easy
1409	Queries on a Permutation With Key	Python	Medium
1410	HTML Entity Parser	Python	Medium
1415	The K-th Lexicographical String of All Happy Strings of Length N	Python	Medium
1420	Build Array Where You Can Find The Maximum Exactly K Comparisons	Python	Hard
1422	Maximum Score After Splitting a String	Python	Easy
1424	Diagonal Traverse II	Python	Medium
1425	Constrained Subsequence Sum	Python	Hard
1427	Perform String Shifts	Python	Easy
1428	Leftmost Column with at Least a One	Python	Medium
1429	First Unique Number	Python	Medium
1431	Kids With the Greatest Number of Candies	Python	Easy
1436	Destination City	Python	Easy
1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Python	Medium
1441	Build an Array With Stack Operations	Python	Easy
1442	Count Triplets That Can Form Two Arrays of Equal XOR	Python	Medium
1447	Simplified Fractions	Python	Medium
1448	Count Good Nodes in Binary Tree	Python	Medium
1451	Rearrange Words in a Sentence	Python	Medium
1455	Check If a Word Occurs as a Prefix of Any Word in a Sentence	Python	Easy
1456	Maximum Number of Vowels in a Substring of Given Length	Python	Medium
1457	Pseudo-Palindromic Paths in a Binary Tree	Python	Medium
1458	Max Dot Product of Two Subsequences	Python	Hard
1460	Make Two Arrays Equal by Reversing Subarrays	Python	Easy
1462	Course Schedule IV	Python	Medium
1463	Cherry Pickup II	Python	Hard
1464	Maximum Product of Two Elements in an Array	Python	Easy
1466	Reorder Routes to Make All Paths Lead to the City Zero	Python	Medium
1469	Find All The Lonely Nodes	Python	Easy
1470	Shuffle the Array	Python	Easy
1471	The K Strongest Values in an Array	Python	Medium
1475	Final Prices With a Special Discount in a Shop	Python	Easy
1476	Subrectangle Queries	Python	Medium
1481	Least Number of Unique Integers after K Removals	Python	Medium
1482	Minimum Number of Days to Make m Bouquets	Python	Medium
1489	Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree	Python	Hard
1492	The Kth Factor of N	Python	Medium
1493	Longest Subarray of 1's After Deleting One Element	Python	Medium
1496	Path Crossing	Python	Easy
1497	Check If Array Pairs Are Divisible by k	Python	Medium
1508	Range Sum of Sorted Subarray Sums	Python	Medium
1509	Minimum Difference Between Largest and Smallest Value in Three Moves	Python	Medium
1512	Number of Good Pairs	Python	Easy
1513	Number of Substrings With Only 1s	Python	Medium
1514	Path with Maximum Probability	Python	Medium
1518	Water Bottles	Python	Easy
1529	Minimum Suffix Flips	Python	Medium
1530	Number of Good Leaf Nodes Pairs	Python	Medium
1531	String Compression II	Python	Hard
1535	Find the Winner of an Array Game	Python	Medium
1539	Kth Missing Positive Number	Python	Easy
1544	Make The String Great	Python	Easy
1545	Find Kth Bit in Nth Binary String	Python	Medium
1550	Three Consecutive Odds	Python	Medium
1551	Minimum Operations to Make Array Equal	Python	Medium
1552	Magnetic Force Between Two Balls	Python	Medium
1561	Maximum Number of Coins You Can Get	Python	Medium
1568	Minimum Number of Days to Disconnect Island	Python	Hard
1570	Dot Product of Two Sparse Vectors	Python	Medium
1574	Shortest Subarray to be Removed to Make Array Sorted	Python	Medium
1578	Minimum Deletion Cost to Avoid Repeating Letters	Python	Medium
1579	Remove Max Number of Edges to Keep Graph Fully Traversable	Python	Hard
1580	Put Boxes Into the Warehouse II	Python	Medium
1581	Customer Who Visited but Did Not Make Any Transactions	SQL	Easy
1582	Special Positions in a Binary Matrix	Python	Easy
1584	Min Cost to Connect All Points	Python	Medium
1590	Make Sum Divisible by P	Python	Medium
1593	Split a String Into the Max Number of Unique Substrings	Python	Medium
1598	Crawler Log Folder	Python	Easy
1605	Find Valid Matrix Given Row and Column Sums	Python	Medium
1608	Special Array With X Elements Greater Than or Equal X	Python	Easy
1609	Even Odd Tree	Python	Medium
1611	Minimum One Bit Operations to Make Integers Zero	Python	Hard
1614	Maximum Nesting Depth of the Parentheses	Python	Easy
1615	Maximal Network Rank	Python	Medium
1630	Arithmetic Subarrays	Python	Medium
1631	Path With Minimum Effort	Python	Medium
1633	Percentage of Users Attended a Contest	SQL	Easy
1634	Add Two Polynomials Represented as Linked Lists	Python	Medium
1636	Sort Array by Increasing Frequency	Python	Easy
1637	Widest Vertical Area Between Two Points Containing No Points	Python	Medium
1639	Number of Ways to Form a Target String Given a Dictionary	Python	Hard
1642	Furthest Building You Can Reach	Python	Medium
1644	Lowest Common Ancestor of a Binary Tree II	Python	Medium
1647	Minimum Deletions to Make Character Frequencies Unique	Python	Medium
1650	Lowest Common Ancestor of a Binary Tree III	Python	Medium
1652	Defuse the Bomb	Python	Easy
1653	Minimum Deletions to Make String Balanced	Python	Medium
1657	Determine if Two Strings Are Close	Python	Medium
1658	Minimum Operations to Reduce X to Zero	Python	Medium
1660	Correct a Binary Tree	Python	Medium
1661	Average Time of Process per Machine	SQL	Easy
1662	Check If Two String Arrays are Equivalent	Python	Easy
1669	Merge In Between Linked Lists	Python	Medium
1671	Minimum Number of Removals to Make Mountain Array	Python	Hard
1679	Max Number of K-Sum Pairs	Python	Medium
1683	Invalid Tweets	SQL	Easy
1684	Count the Number of Consistent Strings	Python	Easy
1685	Sum of Absolute Differences in a Sorted Array	Python	Medium
1688	Count of Matches in Tournament	Python	Easy
1689	Partitioning Into Minimum Number of Deci-Binary Numbers	Python	Medium
1700	Number of Students Unable to Eat Lunch	Python	Easy
1701	Average Waiting Time	Python	Medium
1704	Determine if String Halves Are Alike	Python	Easy
1706	Where Will the Ball Fall	Python	Medium
1716	Calculate Money in Leetcode Bank	Python	Easy
1717	Maximum Score From Removing Substrings	Python	Medium
1718	Construct the Lexicographically Largest Valid Sequence	Python	Medium
1721	Swapping Nodes in a Linked List	Python	Medium
1726	Tuple with Same Product	Python	Medium
1727	Largest Submatrix With Rearrangements	Python	Medium
1730	Shortest Path to Get Food	Python	Medium
1732	Find the Highest Altitude	Python	Easy
1740	Find Distance in a Binary Tree	Python	Medium
1743	Restore the Array From Adjacent Pairs	Python	Medium
1746	Maximum Subarray Sum After One Operation	Python	Medium
1750	Minimum Length of String After Deleting Similar Ends	Python	Medium
1752	Check if Array Is Sorted and Rotated	Python	Easy
1756	Design Most Recently Used Queue	Python	Medium
1757	Recyclable and Low Fat Products	SQL	Medium
1758	Minimum Changes To Make Alternating Binary String	Python	Easy
1759	Count Number of Homogenous Substrings	Python	Medium
1760	Minimum Limit of Balls in a Bag	Python	Medium
1762	Buildings With an Ocean View	Python	Medium
1765	Map of Highest Peak	Python	Medium
1768	Merge Strings Alternately	Python	Easy
1769	Minimum Number of Operations to Move All Balls to Each Box	Python	Medium
1770	Maximum Score from Performing Multiplication Operations	Python	Hard
1790	Check if One String Swap Can Make Strings Equal	Python	Easy
1791	Find Center of Star Graph	Python	Easy
1792	Maximum Average Pass Ratio	Python	Medium
1793	Maximum Score of a Good Subarray	Python	Hard
1800	Maximum Ascending Subarray Sum	Python	Easy
1802	Maximum Value at a Given Index in a Bounded Array	Python	Medium
1804	Implement Trie II (Prefix Tree)	Python	Medium
1813	Sentence Similarity III	Python	Medium
1814	Count Nice Pairs in an Array	Python	Medium
1817	Finding the Users Active Minutes	Python	Medium
1828	Queries on Number of Points Inside a Circle	Python	Medium
1829	Maximum XOR for Each Query	Python	Medium
1833	Maximum Ice Cream Bars	Python	Medium
1834	Single-Threaded CPU	Python	Medium
1836	Remove Duplicates from an Unsorted Linked List	Python	Medium
1838	Frequency of the Most Frequent Element	Python	Medium
1842	Next Palindrome Using Same Digits	Python	Hard
1845	Seat Reservation Manager	Python	Medium
1846	Maximum Element After Decreasing and Rearranging	Python	Medium
1858	Longest Word With All Prefixes	Python	Medium
1861	Rotating the Box	Python	Medium
1863	Sum of All Subset XOR Totals	Python	Easy
1870	Minimum Speed to Arrive on Time	Python	Medium
1877	Minimize Maximum Pair Sum in Array	Python	Medium
1881	Maximum Value After Insertion	Python	Medium
1885	Count Pairs in Two Arrays	Python	Medium
1887	Reduction Operations to Make the Array Elements Equal	Python	Medium
1888	Minimum Number of Flips to Make the Binary String Alternating	Python	Medium
1891	Cutting Ribbons	Python	Medium
1894	Find the Student That Will Replace the Chalk	Python	Medium
1897	Redistribute Characters to Make All Strings Equal	Python	Easy
1898	Maximum Number of Removable Characters	Python	Medium
1899	Merge Triplets to Form Target Triplet	Python	Medium
1903	Largest Odd Number in String	Python	Easy
1905	Count Sub Islands	Python	Medium
1910	Remove All Occurrences of a Substring	Python	Medium
1913	Maximum Product Difference Between Two Pairs	Python	Easy
1915	Number of Wonderful Substrings	Python	Medium
1920	Build Array from Permutation	C++	Easy
1921	Eliminate Maximum Number of Monsters	Python	Medium
1926	Nearest Exit from Entrance in Maze	Python	Medium
1930	Unique Length-3 Palindromic Subsequences	Python	Medium
1934	Confirmation Rate	SQL	Medium
1936	Add Minimum Number of Rungs	Python	Medium
1937	Maximum Number of Points with Cost	Python	Medium
1940	Longest Common Subsequence Between Sorted Arrays	Python	Medium
1942	The Number of the Smallest Unoccupied Chair	Python	Medium
1945	Sum of Digits of String After Convert	Python	Easy
1957	Delete Characters to Make Fancy String	Python	Easy
1963	Minimum Number of Swaps to Make the String Balanced	Python	Medium
1970	Last Day Where You Can Still Cross	Python	Hard
1971	Find if Path Exists in Graph	Python	Easy
1973	Count Nodes Equal to Sum of Descendants	Python	Medium
1975	Maximum Matrix Sum	Python	Medium
1980	Find Unique Binary String	Python	Medium
1992	Find All Groups of Farmland	Python	Medium
2000	Reverse Prefix of Word	Python	Easy
2002	Maximum Product of the Length of Two Palindromic Subsequences	Python	Medium
2009	Minimum Number of Operations to Make Array Continuous	Python	Hard
2013	Detect Squares	Python	Medium
2017	Grid Game	Python	Medium
2022	Convert 1D Array Into 2D Array	Python	Easy
2023	Number of Pairs of Strings With Concatenation Equal to Target	Python	Medium
2028	Find Missing Observations	Python	Medium
2037	Minimum Number of Moves to Seat Everyone	Python	Easy
2038	Remove Colored Pieces if Both Neighbors are the Same Color	Python	Medium
2043	Simple Bank System	Python	Medium
2044	Count Number of Maximum Bitwise OR Subsets	Python	Medium
2045	Second Minimum Time to Reach Destination	Python	Hard
2050	Number of Different Integers in a String	Python	Easy
2053	Kth Distinct String in an Array	Python	Easy
2054	Two Best Non-Overlapping Events	Python	Medium
2055	Plates Between Candles	Python	Medium
2058	Find the Minimum and Maximum Number of Nodes Between Critical Points	Python	Medium
2061	Number of Spaces Cleaning Robot Cleaned	Python	Medium
2062	Count Vowel Substrings of a String	Python	Easy
2064	Minimized Maximum of Products Distributed to Any Store	Python	Medium
2070	Most Beautiful Item for Each Query	Python	Medium
2073	Time Needed to Buy Tickets	Python	Easy
2074	Reverse Nodes in Even Length Groups	Python	Medium
2077	Paths in Maze That Lead to Same Room	Python	Medium
2079	Watering Plants	Python	Medium
2083	Substrings That Begin and End With the Same Letter	Python	Medium
2089	Find Target Indices After Sorting Array	Python	Easy
2090	K Radius Subarray Averages	Python	Medium
2091	Removing Minimum and Maximum From Array	Python	Medium
2092	Find All People With Secret	Python	Hard
2093	Minimum Cost to Reach City With Discounts	Python	Medium
2095	Delete the Middle Node of a Linked List	Python	Medium
2096	Step-By-Step Directions From a Binary Tree Node to Another	Python	Medium
2097	Valid Arrangement of Pairs	Python	Hard
2099	Find Subsequence of Length K With the Largest Sum	Python	Easy
2101	Detonate the Maximum Bombs	Python	Medium
2107	Number of Unique Flavors After Sharing K Candies	Python	Medium
2108	Find First Palindromic String in the Array	Python	Medium
2109	Adding Spaces to a String	Python	Medium
2115	Find All Possible Recipes from Given Supplies	Python	Medium
2116	Check if a Parentheses String Can Be Valid	Python	Medium
2120	Execution of All Suffix Instructions Staying in a Grid	Python	Medium
2125	Number of Laser Beams in a Bank	Python	Medium
2127	Maximum Employees to Be Invited to a Meeting	Python	Hard
2130	Maximum Twin Sum of a Linked List	Python	Medium
2131	Longest Palindrome by Concatenating Two Letter Words	Python	Medium
2134	Minimum Swaps to Group All 1's Together II	Python	Medium
2141	Maximum Running Time of N Computers	Python	Hard
2147	Number of Ways to Divide a Long Corridor	Python	Hard
2149	Rearrange Array Elements by Sign	Python	Medium
2150	Find All Lonely Numbers in the Array	Python	Medium
2155	All Divisions With the Highest Score of a Binary Array	Python	Medium
2161	Partition Array According to Given Pivot	Python	Medium
2165	Smallest Value of the Rearranged Number	Python	Medium
2168	Unique Substrings With Equal Digit Frequency	Python	Medium
2177	Find Three Consecutive Integers That Sum to a Given Number	Python	Medium
2181	Merge Nodes in Between Zeros	Python	Medium
2182	Construct String With Repeat Limit	Python	Medium
2185	Counting Words With a Given Prefix	Python	Easy
2186	Minimum Number of Steps to Make Two Strings Anagram II	Python	Medium
2192	All Ancestors of a Node in a Directed Acyclic Graph	Python	Medium
2193	Minimum Number of Moves to Make Palindrome	Python	Hard
2196	Create Binary Tree From Descriptions	Python	Medium
2204	Distance to a Cycle in Undirected Graph	Python	Hard
2214	Minimum Health to Beat Game	Python	Medium
2215	Find the Difference of Two Arrays	Python	Easy
2220	Minimum Bit Flips to Convert Number	Python	Easy
2221	Find Triangular Sum of an Array	Python	Medium
2225	Find Players With Zero or One Losses	Python	Medium
2231	Largest Number After Digit Swaps by Parity	Python	Easy
2240	Number of Ways to Buy Pens and Pencils	Python	Medium
2244	Minimum Rounds to Complete All Tasks	Python	Medium
2246	Longest Path With Different Adjacent Characters	Python	Hard
2251	Number of Flowers in Full Bloom	Python	Hard
2256	Minimum Average Difference	Python	Medium
2257	Count Unguarded Cells in the Grid	Python	Medium
2260	Minimum Consecutive Cards to Pick Up	Python	Medium
2262	Total Appeal of a String	Python	Hard
2264	Largest 3-Same-Digit Number in String	Python	Easy
2265	Count Nodes Equal to Average of Subtree	Python	Medium
2270	Number of Ways to Split Array	Python	Medium
2274	Maximum Consecutive Floors Without Special Floors	Python	Medium
2275	Largest Combination With Bitwise AND Greater Than Zero	Python	Medium
2279	Maximum Bags With Full Capacity of Rocks	Python	Medium
2284	Sender With Largest Word Count	Python	Medium
2285	Maximum Total Importance of Roads	Python	Medium
2290	Minimum Obstacle Removal to Reach Corner	Python	Hard
2291	Maximum Profit From Trading Stocks	Python	Medium
2300	Successful Pairs of Spells and Potions	Python	Medium
2303	Calculate Amount Paid in Taxes	Python	Easy
2331	Evaluate Boolean Binary Tree	Python	Easy
2334	Subarray With Elements Greater Than Varying Threshold	Python	Hard
2336	Smallest Number in Infinite Set	Python	Medium
2337	Move Pieces to Obtain a String	Python	Medium
2342	Max Sum of a Pair With Equal Sum of Digits	Python	Medium
2348	Number of Zero-Filled Subarrays	Python	Medium
2349	Design a Number Container System	Python	Medium
2352	Equal Row and Column Pairs	Python	Medium
2353	Design a Food Rating System	Python	Medium
2355	Maximum Number of Books You Can Take	Python	Hard
2357	Make Array Zero by Subtracting Equal Amounts	Python	Easy
2361	Minimum Costs Using the Train Line	Python	Hard
2364	Count Number of Bad Pairs	Python	Medium
2366	Minimum Replacements to Sort the Array	Python	Hard
2369	Check If There Is a Valid Partition for the Array	Python	Medium
2370	Longest Ideal Subsequence	Python	Medium
2371	Minimize Maximum Value in a Grid	Python	Hard
2373	Largest Local Values in a Matrix	Python	Easy
2375	Construct Smallest Number From DI String	Python	Medium
2381	Shifting Letters II	Python	Medium
2384	Largest Palindromic Number	Python	Medium
2385	Amount of Time for Binary Tree to be Infected	Python	Medium
2389	Longest Subsequence With Limited Sum	Python	Easy
2390	Removing Stars From a String	Python	Medium
2391	Minimum Amount of Time to Collect Garbage	Python	Medium
2392	Build a Matrix With Conditions	Python	Hard
2393	Count Strictly Increasing Subarrays	Python	Medium
2396	Strictly Palindromic Number	Python	Medium
2402	Meeting Rooms III	Python	Hard
2405	Optimal Partition of String	Python	Medium
2406	Divide Intervals Into Minimum Number of Groups	Python	Medium
2410	Maximum Matching of Players With Trainers	Python	Medium
2414	Length of the Longest Alphabetical Continuous Substring	Python	Medium
2415	Reverse Odd Levels of Binary Tree	Python	Medium
2416	Sum of Prefix Scores of Strings	Python	Hard
2418	Sort the People	Python	Easy
2419	Longest Subarray With Maximum Bitwise AND	Python	Medium
2425	Bitwise XOR of All Pairings	Python	Medium
2428	Maximum Sum of an Hourglass	Python	Medium
2429	Minimize XOR	Python	Medium
2433	Find the Original Array of Prefix XOR	Python	Medium
2439	Minimize Maximum of Array	Python	Medium
2441	Largest Positive Integer That Exists With Its Negative	Python	Easy
2442	Count Number of Distinct Integers After Reverse Operations	Python	Medium
2443	Sum of Number and Its Reverse	Python	Medium
2444	Count Subarrays with Fixed Bounds	Python	Hard
2458	Height of Binary Tree After Subtree Removal Queries	Python	Hard
2461	Maximum Sum of Distinct Subarrays With Length K	Python	Medium
2462	Total Cost to Hire K Workers	Python	Medium
2463	Minimum Total Distance Traveled	Python	Hard
2466	Count Ways to Build Good Strings	Python	Medium
2467	Most Profitable Path in a Tree	Python	Medium
2471	Minimum Number of Operations to Sort a Binary Tree by Level	Python	Medium
2473	Minimum Cost to Buy Apples	Python	Medium
2482	Difference Between Ones and Zeros in Row and Column	Python	Medium
2483	Minimum Penalty for a Shop	Python	Medium
2485	Find the Pivot Integer	Python	Easy
2486	Append Characters to String to Make Subsequence	Python	Medium
2487	Remove Nodes from Linked List	Python	Medium
2490	Circular Sentence	Python	Easy
2491	Divide Players Into Teams of Equal Skill	Python	Medium
2493	Divide Nodes Into the Maximum Number of Groups	Python	Hard
2501	Longest Square Streak in an Array	Python	Medium
2505	Bitwise OR of All Subarrays	Python	Medium
2516	Take K of Each Character From Left and Right	Python	Medium
2530	Maximal Score After Applying K Operations	Python	Medium
2539	Count the Number of Good Subsequences	Python	Medium
2540	Minimum Common Value	Python	Easy
2542	Maximum Subsequence Score	Python	Medium
2545	Sort the Students by Their Kth Score	Python	Medium
2554	Maximum Number of Integers to Choose From a Range I	Python	Medium
2558	Take Gifts From the Richest Pile	Python	Easy
2559	Count Vowel Strings in Ranges	Python	Medium
2561	Rearranging Fruits	Python	Hard
2563	Count the Number of Fair Pairs	Python	Medium
2577	Minimum Time to Visit a Cell in a Grid	Python	Hard
2579	Count Total Number of Colored Cells	Python	Medium
2582	Pass the Pillow	Python	Easy
2583	Kth Largest Sum in a Binary Tree	Python	Medium
2587	Rearrange Array to Maximize Prefix Score	Python	Medium
2592	Maximize Greatness of an Array	Python	Medium
2593	Find Score of an Array After Marking All Elements	Python	Medium
2597	The Number of Beautiful Subsets	Python	Medium
2599	Make the Prefix Sum Non-Negative	Python	Medium
2601	Prime Subtraction Operation	Python	Medium
2602	Minimum Operations to Make All Array Elements Equal	Python	Medium
2610	Convert an Array into a 2D Array with Conditions	Python	Medium
2616	Minimize the Maximum Difference of Pairs	Python	Medium
2618	Check if Object Instance of Class	TypeScript	Medium
2619	Array.prototype.last	JavaScript	Easy
2620	Counter	JavaScript	Easy
2621	Sleep	JavaScript	Easy
2622	Cache with Time Limit	JavaScript	Medium
2623	Memoize	JavaScript	Medium
2624	Snail Traversal	TypeScript	Medium
2625	Flatten Deeply Nested Array	JavaScript	Medium
2626	Array Reduce Transformation	JavaScript	Easy
2627	Debounce	JavaScript	Medium
2628	JSON Deep Equal	JavaScript	Medium
2629	Function Composition	JavaScript	Easy
2630	Memoize II	TypeScript	Hard
2631	Group By	JavaScript	Medium
2632	Curry	JavaScript	Medium
2633	Convert Object to JSON String	JavaScript	Medium
2634	Filter Elements from Array	JavaScript	Easy
2635	Apply Transform over Each Element in Array	JavaScript	Easy
2636	Promise Pool	JavaScript	Medium
2637	Promise Time Limit	JavaScript	Medium
2640	Find the Score of All Prefixes of an Array	Python	Medium
2641	Cousins in Binary Tree II	Python	Medium
2642	Design Graph with Shortest Path Calculator	Python	Hard
2648	Generate Fibonacci Sequence	TypeScript	Easy
2649	Nested Array Generator	TypeScript	Medium
2650	Design Cancellable Function	TypeScript	Hard
2657	Find the Prefix Common Array of Two Arrays	Python	Medium
2658	Maximum Number of Fish in a Grid	Python	Medium
2661	First Completely Painted Row or Column	Python	Medium
2664	The Knight's Tour	Python	Medium
2665	Counter II	JavaScript	Easy
2666	Allow One Function Call	JavaScript	Easy
2667	Create Hello World Function	JavaScript	Easy
2674	Split a Circular Linked List	Python	Medium
2675	Array of Objects to Matrix	TypeScript	Hard
2676	Throttle	JavaScript	Medium
2677	Chunk Array	JavaScript	Easy
2678	Number of Senior Citizens	Python	Easy
2679	Sum in a Matrix	Python	Medium
2683	Neighboring Bitwise XOR	Python	Medium
2684	Maximum Number of Moves in a Grid	Python	Medium
2690	Infinite Method Object	TypeScript	Easy
2692	Make Object Immutable	TypeScript	Medium
2694	Event Emitter	JavaScript	Medium
2695	Array Wrapper	JavaScript	Easy
2696	Minimum String Length After Removing Substrings	Python	Easy
2698	Find the Punishment Number of an Integer	Python	Medium
2699	Modify Graph Edge Weights	Python	Hard
2703	Return Length of Arguments Passed	JavaScript	Easy
2704	To Be or Not To Be	JavaScript	Easy
2705	Compact Object	JavaScript	Medium
2706	Buy Two Chocolates	Python	Easy
2707	Extra Characters in a String	Python	Medium
2709	Greatest Common Divisor Traversal	Python	Hard
2715	Execute Cancellable Function with Delay	JavaScript	Easy
2721	Execute Asynchronous Functions in Parallel	JavaScript	Medium
2722	Join Two Arrays by ID	JavaScript	Medium
2723	Add Two Promises	JavaScript	Easy
2724	Sort By	JavaScript	Easy
2725	Interval Cancellation	JavaScript	Easy
2726	Calculator with Method Chaining	JavaScript	Easy
2727	Is Object Empty	JavaScript	Easy
2734	Lexicographically Smallest String After Substring Operation	Python	Medium
2740	Find the Value of the Partition	Python	Medium
2742	Painting the Walls	Python	Hard
2743	Count Substrings Without Repeating Character	Python	Medium
2751	Robot Collisions	Python	Hard
2762	Continuous Subarrays	Python	Medium
2771	Longest Non-decreasing Subarray From Two Arrays	Python	Medium
2772	Apply Operations to Make All Array Elements Equal to Zero	Python	Medium
2778	Sum of Squares of Special Elements	Python	Easy
2779	Maximum Beauty of an Array After Applying Operation	Python	Medium
2784	Check if Array is Good	Python	Easy
2785	Sort Vowels in a String	Python	Medium
2788	Split Strings by Separator	Python	Easy
2789	Largest Element in an Array after Merge Operations	Python	Medium
2798	Number of Employees Who Met the Target	Python	Easy
2799	Count Complete Subarrays in an Array	Python	Medium
2802	Find the K-th Lucky Number	Python	Medium
2806	Account Balance after Rounded Purchase	Python	Easy
2807	Insert Greatest Common Divisors in Linked List	Python	Medium
2810	Faulty Keyboard	Python	Easy
2811	Check If It Is Possible to Split Array	Python	Medium
2812	Find the Safest Path in a Grid	Python	Medium
2814	Minimum Time Takes to Reach Destination Without Drowning	Python	Hard
2816	Double a Number Represented as a Linked List	Python	Medium
2824	Count Pairs Whose Sum Is Less Than Target	Python	Easy
2825	Make String A Subsequence Using Cyclic Increments	Python	Medium
2829	Determine the Minimum Sum of a K-Avoiding Array	Python	Medium
2832	Maximal Range That Each Element Is Maximum In It	Python	Medium
2833	Furthest Point from Origin	Python	Easy
2834	Find the Minimum Possible Sum of a Beautiful Array	Python	Medium
2838	Maximum Coins Heroes Can Collect	Python	Medium
2849	Determine if a Cell is Reachable at a Given Time	Python	Medium
2850	Minimum Moves to Spread Stones Over Grid	Python	Medium
2852	Sum of Remoteness of All Cells	Python	Medium
2856	Minimum Array Length After Pair Removals	[Python](.