LeetCode.md

Leetcode

Problems have been solved: 722

Problem	Difficulty	Tags	Cpp	Java	JS	Python	Go	Kotlin	Rust
0001. Two Sum	Easy	Array Hash Table	cpp	java	js	py	go	kt	rs
0002. Add Two Numbers	Medium	Recursion Linked List Math	cpp			py
0003. Longest Substring Without Repeating Characters	Medium	Hash Table Two Pointers String	cpp			py	go	kt
0004. Median of Two Sorted Arrays	Hard	Array Binary Search Divide and Conquer						kt
0005. Longest Palindromic Substring	Medium	String Dynamic Programming	cpp	java		py		kt
0006. ZigZag Conversion	Medium	String	cpp	java		py		kt
0007. Reverse Integer	Easy	Math	cpp			py		kt
0009. Palindrome Number	Easy	Math						kt
0011. Container With Most Water	Medium	Array Two Pointers Greedy	cpp			py
0012. Integer to Roman	Medium	Math String	cpp			py		kt
0013. Roman to Integer	Easy	Math String	cpp					kt
0014. Longest Common Prefix	Easy	String	cpp
0015. 3Sum	Medium	Array Two Pointers	cpp			py
0017. Letter Combinations of a Phone Number	Medium	String Backtracking				py		kt
0018. 4Sum	Medium	Array Two Pointers	cpp			py
0020. Valid Parentheses	Easy	String Stack	cpp			py		kt
0021. Merge Two Sorted Lists	Easy	Recursion Linked List	cpp			py	go
0022. Generate Parentheses	Medium	String Backtracking	cpp			py
0024. Swap Nodes in Pairs	Medium	Linked List	cpp	java
0026. Remove Duplicates from Sorted Array	Easy	Array Two Pointers	cpp			py		kt
0027. Remove Element	Easy	Array Two Pointers	cpp			py		kt
0028. Implement strStr()	Easy	Two Pointers String	cpp
0029. Divide Two Integers	Medium	Bit Manipulation Math	cpp
0030. Substring with Concatenation of All Words	Hard	String Hash Table Slide Window				py
0031. Next Permutation	Medium	Array Two Pointers				py
0033. Search in Rotated Sorted Array	Medium	Array Binary Search	cpp			py
0034. Search for a Range	Medium	Array Binary Search	cpp			py		kt
0035. Search Insert Position	Easy	Array Binary Search						kt
0036. Valid Sudoku	Medium	Array Hash Table	cpp
0038. Count and Say	Medium	String	cpp
0039. Combination Sum	Medium	Array Backtracking				py
0040. Combination Sum II	Medium	Array Backtracking				py
0041. First Missing Positive	Hard	Array	cpp
0042. Trapping Rain Water	Hard	Stack Array Two Pointers Dynamic Programming	cpp			py
0045. Jump Game II	Medium	Array Dynamic Programming Greedy	cpp			py	go
0046. Permutations	Medium	Backtracking						kt
0047. Permutations II	Medium	Backtracking/	cpp			py		kt
0048. Rotate Image	Medium	Array	cpp			py
0050. Pow(x, n)	Medium	Math Binary Search						kt
0051. N Queens	Hard	Backtracking						kt
0053. Maximum Subarray	Easy	Array Divide and Conquer Dynamic Programming	cpp	java		py	go
0054. Spiral Matrix	Medium	Array	cpp
0055. Jump Game	Medium	Array Dynamic Programming Greedy	cpp			py	go
0056. Merge Intervals	Medium	Array Sorting	cpp	java		py
0058. Length of Last Word	Easy	String	cpp			py	go	kt
0059. Spiral Matrix II	Medium	Array	cpp			py
0061. Rotate List	Medium	Two Pointers Linked List	cpp			py
0062. Unique Paths	Medium	Dynamic Programming Math Combinatorics				py
0063. Unique Paths II	Medium	Array Matrix Dynamic Programming				py
0064. Minimum Path Sum	Medium	Array Dynamic Programming	cpp			py		kt
0066. Plus One	Easy	Array Math	cpp			py
0067. Add Binary	Easy	Math String						kt
0068. Text Justification	Hard	String Simulation	cpp
0069. Sqrt(x)	Easy	Math Binary Search						kt
0070. Climbing Stairs	Easy	Dynamic Programming	cpp			py	go	kt
0071. Simplify Path	Medium	String Stack	cpp			py	go	kt
0072. Edit Distance	Hard	String Dynamic Programming	cpp			py
0073. Set Matrix Zeroes	Medium	Array	cpp
0074. Search a 2D Matrix	Medium	Array Binary Search	cpp			py
0075. Sort Colors	Medium	Array Two Pointers Sort		java	js	py		kt
0077. Combinations	Medium	Array Backtracking						kt
0078. Subsets	Hard	Array Backtracking Bit Manipulation	cpp			py
0079. Word Search	Medium	Array Backtracking	cpp			py		kt
0080. Remove Duplicates from Sorted Array II	Medium	Array Two Pointers	cpp			py
0081. Search in Rotated Sorted Array II	Medium	Array Binary Search	cpp			py
0082. Remove Duplicates from Sorted List II	Medium	Linked List	cpp			py
0083. Remove Duplicates from Sorted List	Easy	Linked List	cpp			py		kt
0087. Scramble String	Hard	String Dynamic Programming	cpp			py
0088. Merge Sorted Array	Easy	Array Two Pointers	cpp			py		kt
0089. Gray Code	Medium	Backtracking Bit Manipulation Math	cpp			py	go
0090. Subsets II	Medium	Array Backtracking	cpp			py
0091. Decode Ways	Medium	String Dynamic Programming	cpp	java		py		kt
0092. Reverse Linked List II	Medium	Linked List	cpp			py
0094. Binary Tree Inorder Traversal	Medium	Hash Table Stack Tree						kt
0096. Unique Binary Search Trees	Medium	Binary Tree Dynamic Programming Math Binary Search Tree Tree				py
0097. Interleaving String	Medium	String Dynamic Programming	cpp			py
0098. Validate Binary Search Tree	Medium	Tree Depth-first Search	cpp
0100. Same Tree	Easy	Tree Depth-first Search						kt
0101. Symmetric Tree	Easy	tree Depth-first Search breadth-first Search				py
0102. Binary Tree Level Order Traversal	Medium	Tree Breadth-first Search	cpp					kt
0103. Binary Tree Zigzag Level Order Traversal	Medium	Stack Tree Breadth-first Search						kt
0104. Maximum Depth of Binary Tree	Easy	Tree Depth-first Search	cpp			py		kt
0105. Construct Binary Tree from Preorder and Inorder Traversal	Medium	Array Tree Depth-first Search		java				kt
0106. Construct Binary Tree from Inorder and Postorder Traversal	Medium	Array Tree Depth-first Search		java				kt
0107. Binary Tree Level Order Traversal II	Easy	Tree Breadth-first Search				py
0108. Convert Sorted Array to Binary Search Tree	Easy	Tree Depth-first Search				py
0110. Balanced Binary Tree	Easy	Tree Depth-first Search Recursion				py
0111. Minimum Depth of Binary Tree	Easy	Tree Depth-first Search Breadth-first Search	cpp					kt
0112. Path Sum	Easy	Tree Depth-first Search	cpp			py		kt
0115. Distinct Subsequences	Hard	String Dynamic Programming	cpp			py
0117. Populating Next Right Pointers in Each Node II	Medium	Linked List Binary Tree Tree Breadth-first Search Depth-first Search	cpp			py
0118. Pascal's Triangle	Medium	Linked List Binary Tree Tree Breadth-first Search Depth-first Search	cpp	java		py		kt
0119. Pascal's Triangle II	Easy	Array	cpp			py
0120. Triangle	Medium	Array Dynamic Programming	cpp			py		kt
0121. Best Time to Buy and Sell Stock	Easy	Array Dynamic Programming	cpp	java	js	py	go	kt	rs
0122. Best Time to Buy and Sell Stock II	Easy	Array Greedy	cpp			py		kt
0125. Valid Palindrome	Easy	Two Pointers String						kt
0127. Word Ladder	Medium	Breadth-first Search	cpp	java				kt
0128. Longest Consecutive Sequence	Hard	Array Union Find						kt
0129. Sum Root to Leaf Numbers	Medium	Tree Depth-first Search				py
0130. Surrounded Regions	Medium	Depth-first Search Breadth-first Search Union Find	cpp			py		kt
0131. Palindrome Partitioning	Medium	Depth-first Search Dynamic Programming Backtracking	cpp			py
0132. Palindrome Partitioning II	Hard	Dynamic Programming	cpp			py
0136. Single Number	Easy	Hash Table Bit Manipulation						kt
0137. Single Number II	Medium	Bit Manipulation	cpp			py
0139. Word Break	Medium	String Hash Table Dynamic Programming Trie				py
0141. Linked List Cycle	Easy	Linked List Two Pointerss	cpp
0142. Linked List Cycle II	Medium	Linked List Two Pointerss	cpp
0144. Binary Tree Preorder Traversal	Medium	Stack Tree						kt
0145. Binary Tree Postorder Traversal	Hard	Stack Tree						kt
0148. Sort List	Medium	Linked List Sort		java				kt
0149. Max Points on a Line	Hard	Array Hash Table Math Geometry	cpp			py
0150. Evaluate Reverse Polish Notation	Medium	Stack	cpp	java	js	py		kt
0151. Reverse Words in a String	Medium	String		java
0152. Maximum Product Subarray	Medium	Array Dynamic Programming				py
0153. Find Minimum in Rotated Sorted Array	Medium	Array Binary Search	cpp			py
0154. Find Minimum in Rotated Sorted Array II	Hard	Array Binary Search	cpp			py
0160. Intersection of Two Linked Lists	Easy	Two Pointers Linked List Hash Table	cpp			py
0162. Find Peak Element	Hard	Array Binary Search	cpp
0165. Compare Version Numbers	Medium	String	cpp			py		kt
0166. Fraction to Recurring Decimal	Medium	Hash Table Math String	cpp
0167. Two Sum II - Input array is sorted	Easy	Array Two Pointers Binary Search	cpp	java		py		kt
0168. Excel Sheet Column Title	Hard	String Math	cpp			py	go
0169. Majority Element	Easy	Bit Manipulation Array Divide and Conquer					go
0172. Factorial Trailing Zeroes	Medium	Math	cpp	java		py	go		rs
0173. Binary Search Tree Iterator	Medium	Stack Tree Design	cpp
0179. Largest Number	Medium	Sort	cpp	java		py		kt
0187. Repeated DNA Sequences	Medium	Bit Manipulation Hash Table String Sliding Window	cpp
0189. Rotate Array	Medium	Array	cpp				go
0190. Reverse Bits	Easy	Bit Manipulation	cpp			py
0191. Number of 1 Bits	Easy	Bit Manipulation	cpp
0198. House Robber	Easy	Dynamic Programming	cpp			py	go	kt
0199. Binary Tree Right Side View	Medium	Tree Depth-first Search Breadth-first Search						kt
0200. Number of Islands	Medium	Depth-first Search Breadth-first Search Union Find	cpp			py		kt
0201. Bitwise AND of Numbers Range	Medium	Bit Manipulation				py
0202. Happy Number	Easy	Hash Table Math	cpp			py		kt
0203. Remove Linked List Elements	Easy	Linked List						kt
0204. Count Primes	Easy	Hash Table Math						kt
0205. Isomorphic Strings	Easy	Hash Table	cpp			py		kt
0206. Reverse Linked List	Easy	Linked List	cpp	java				kt
0208. Implement Trie (Prefix Tree)	Medium	Design Trie	cpp			py
0209. Minimum Size Subarray Sum	Medium	Array Two Pointers Binary Search	cpp	java		py		kt
0211. Design Add and Search Words Data Structure	Medium	Depth-first Search Design Trie String	cpp
0212. Word Search II	Hard	Trie Array String Backtracking	cpp
0213. House Robber II	Medium	Dynamic Programming	cpp			py	go
0215. Kth Largest Element in an Array	Medium	Divide and Conquer Heap						kt
0217. Contains Duplicate	Easy	Array Hash Table	cpp			py		kt
0219. Contains Duplicate II	Easy	Array Hash Table	cpp			py	go	kt
0220. Contains Duplicate III	Medium	Binary Search Tree	cpp					kt
0221. Maximal Square	Hard	Array Matrix Dynamic Programming				py
0223. Rectangle Area	Hard	Math	cpp
0224. Basic Calculator	Hard	Stack Math	cpp
0225. Implement Stack using Queues	Easy	Queue Design	cpp
0226. Invert Binary Tree	Easy	Tree						kt
0227. Basic Calculator II	Medium	Stack String	cpp			py
0228. Summary Ranges	Easy	Array	cpp	java
0229. Majority Element II	Medium	Array Hash Table	cpp
0230. Kth Smallest Element in a BST	Medium	Binary Search Tree	cpp			py		kt
0231. Power of Two	Easy	Math Bit Manipulation	cpp			py		kt
0232. Implement Queue using Stacks	Easy	Stack Design	cpp			py
0233. Number of Digit One	Hard	Recursion Math Dynamic Programming	cpp
0235. Lowest Common Ancestor of a Binary Search Tree	Easy	Tree		java
0237. Delete Node in a Linked List	Easy	Linked List	cpp				go
0240. Search a 2D Matrix II	Medium	Array Binary Search Divide and Conquer Matrix	cpp
0241. Different Ways to Add Parentheses	Medium	Divide and Conquer						kt
0242. Valid Anagram	Easy	Hash Table Sort						kt
0257. Binary Tree Paths	Easy	Tree Depth-first Search						kt
0258. Add Digits	Easy	Math	cpp			py		kt
0260. Single Number III	Medium	Bit Manipulation	cpp	java				kt
0263. Ugly Number	Easy	Math	cpp			py		kt
0264. Ugly Number II	Medium	Heap Math Dynamic Programming	cpp			py
0268. Missing Number	Easy	Array Math Bit Manipulation	cpp					kt
0273. Integer to English Words	Hard	Math String	cpp
0278. First Bad Version	Easy	Binary Search	cpp			py
0279. Perfect Squares	Medium	Math Dynamic Programming Breadth-first Search	cpp			py		kt
0282. Expression Add Operators	Hard	Math String Backtracking	cpp
0283. Move Zeroes	Easy	Array Two Pointers		java	js	py		kt
0284. Peeking Iterator	Medium	Array Design	cpp
0287. Find the Duplicate Number	Medium	Array Two Pointers Binary Search	cpp
0290. Word Pattern	Easy	Hash Table	cpp			py
0292. Nim Game	Easy	Brainteaser Math Game Theory	cpp	java	js	py	go	kt
0295. Find Median from Data Stream	Hard	Heap Design	cpp			py
0299. Bulls and Cows	Medium	String Hash Table	cpp
0300. Longest Increasing Subsequence	Medium	Binary Search Dynamic Programming	cpp			py		kt
0301. Remove Invalid Parentheses	Hard	Backtracking String Depth-first Search	cpp
0303. Range Sum Query - Immutable	Easy	Dynamic Programming	cpp			py
0304. Range Sum Query 2D - Immutable	Medium	Dynamic Programming	cpp			py
0306. Additive Number	Medium	Backtracking String	cpp
0307. Range Sum Query - Mutable	Medium	Design Binary Indexed Tree Segment Tree Array	cpp
0309. Best Time to Buy and Sell Stock with Cooldown	Medium	Array Dynamic Programming				py
0310. Minimum Height Trees	Medium	Breadth-first Search Depth-first Search Graph Topological Sort	cpp			py
0316. Remove Duplicate Letters	Medium	Stack Greedy String	cpp
0318. Maximum Product of Word Lengths	Medium	Array String Bit Manipulation	cpp
0322. Coin Change	Medium	Dynamic Programming	cpp			py		kt
0326. Power of Three	Easy	Math	cpp					kt
0329. Longest Increasing Path in a Matrix	Hard	Dynamic Programming Binary Search Tree Breadth-first Search Depth-first Search Graph Topological Sort	cpp			py
0331. Verify Preorder Serialization of a Binary Tree	Medium	Stack	cpp			py
0334. Increasing Triplet Subsequence	Medium	Array Greedy	cpp
0338. Counting Bits	Medium	Bit Manipulation Dynamic Programming	cpp			py
0341. Flatten Nested List Iterator	Medium	Stack Design	cpp
0342. Power of Four	Easy	Bit Manipulation	cpp			py		kt
0343. Integer Break	Medium	Math Dynamic Programming				py		kt
0344. Reverse String	Easy	Two Pointers String						kt
0345. Reverse Vowels of a String	Easy	Two Pointers String	cpp					kt
0347. Top K Frequent Elements	Medium	Hash Table Heap						kt
0349. Intersection of Two Arrays	Easy	Sort Hash Table Two Pointers Binary Search						kt
0350. Intersection of Two Arrays II	Easy	Sort Hash Table Two Pointers Binary Search						kt
0352. Data Stream as Disjoint Intervals	Hard	Design Binary Search Heap Ordered Set	cpp
0354. Russian Doll Envelopes	Hard	Binary Search Dynamic Programming	cpp			py
0357. Count Numbers with Unique Digits	Medium	Backtracking Dynamic Programming Math	cpp			py
0363. Max Sum of Rectangle No Larger Than K	Hard	Queue Binary Search Dynamic Programming
0365. Water and Jug Problem	Medium	Math	cpp			py	go
0367. Valid Perfect Square	Easy	Binary Search Math	cpp
0368. Largest Divisible Subset	Medium	Math Dynamic Programming	cpp			py
0371. Sum of Two Integers	Easy	Bit Manipulation	cpp	java				kt
0372. Super Pow	Medium	Math	cpp	java				kt
0373. Find K Pairs with Smallest Sums	Medium	Array Heap	cpp
0374. Guess Number Higher or Lower	Easy	Binary Search	cpp			py
0376. Wiggle Subsequence	Medium	Array Dynamic Programming Greedy				py
0377. Combination Sum IV	Medium	Dynamic Programming	cpp			py
0380. Insert Delete GetRandom O(1)	Medium	Array Design Hash Table Math Randomized	cpp
0382. Linked List Random Node	Medium	Linked List Math	cpp			py
0383. Ransom Note	Easy	String Hash Table	cpp
0384. Shuffle an Array	Medium	Array Math	cpp			py
0385. Mini Parser	Medium	String Stack Depth-first Search	cpp
0386. Lexicographical Numbers	Medium	Depth-first Search Trie	cpp
0388. Longest Absolute File Path	Medium	String Stack Depth-first Search				py
0389. Find the Difference	Easy	Hash Table Bit Manipulation	cpp					kt
0390. Elimination Game	Medium	Math	cpp			py	go
0391. Perfect Rectangle	Hard	Array	cpp
0392. Is Subsequence	Medium	Binary Search Dynamic Programming Greedy	cpp	java		py		kt
0393. UTF-8 Validation	Medium	Array Bit Manipulation	cpp			py
0395. Longest Substring with At Least K Repeating Characters	Medium	Recursion Divide and Conquer Sliding Window	cpp
0396. Rotate Function	Medium	Array Dynamic Programming Math	cpp			py
0397. Integer Replacement	Medium	Math Bit Manipulation	cpp					kt
0398. Random Pick Index	Medium	Hash Table Math	cpp			py
0400. Nth Digit	Easy	Tree Binary Search Tree Binary Tree	cpp
0401. Binary Watch	Easy	Bit Manipulation Backtracking	cpp			py
0405. Convert a Number to Hexadecimal	Easy	Bit Manipulation	cpp	java				kt
0409. Longest Palindrome	Easy	Hash Table					go
0412. Fizz Buzz	Easy	String Math Simulation	cpp			py		kt
0413. Arithmetic Slices	Medium	Array Dynamic Programming	cpp			py
0414. Third Maximum Number	Easy	Array	cpp
0415. Add Strings	Easy	Math						kt
0416. Partition Equal Subset Sum	Medium	Dynamic Programming	cpp			py		kt
0417. Pacific Atlantic Water Flow	Medium	Array Breadth-first Search Depth-first Search	cpp			py
0421. Maximum XOR of Two Numbers in an Array	Medium	Bit Manipulation Trie	cpp
0424. Longest Repeating Character Replacement	Medium	Two Pointers Sliding Window	cpp			py
0429. N-ary Tree Level Order Traversal	Medium	Tree Breadth-first Search	cpp			py
0430. Flatten a Multilevel Doubly Linked List	Medium	Linked List Depth-first Search	cpp
0432. All O one Data Structure	Hard	Hash Table Linked List Design	cpp
0433. Minimum Genetic Mutation	Medium	String Hash Table Breadth-first Search	cpp			py
0434. Number of Segments in a String	Easy	String	cpp
0435. Non overlapping Intervals	Medium	Greedy	cpp					kt
0436. Find Right Interval	Medium	Array Sorting Binary Search	cpp
0437. Path Sum III	Easy	Tree	cpp					kt
0438. Find All Anagrams in a String	Medium	String Hash Table Sliding Window	cpp			py
0441. Arranging Coins	Easy	Binary Search math	cpp			py
0442. Find All Duplicates in an Array	Medium	Array	cpp			py
0443. String Compression	Medium	Two Pointers String	cpp
0447. Number of Boomeranges	Easy	Hash Table	cpp					kt
0448. Find All Numbers Disappeared in an Array	Easy	Array	cpp			py		kt
0449. Serialize and Deserialize BST	Medium	String Binary Tree Binary Search Tree Tree Breadth-first Search Depth-first Search Design	cpp			py
0450. Delete Node in a BST	Medium	Binary Tree Binary Search Tree Tree	cpp			py
0451. Sort Characters By Frequency	Medium	Hash Table Heap						kt
0453. Minimum Moves to Equal Array Elements	Easy	Array Math	cpp	java		py
0454. 4Sum II	Medium	Hash Table Binary Search						kt
0455. Assign Cookies	Easy	Greedy	cpp			py		kt
0456. 132 Pattern	Medium	Stack	cpp			py		kt
0457. Circular Array Loop	Medium	Array Hash Table Two Pointers	cpp
0461. Hamming Distance	Easy	Bit Manipulation	cpp			py		kt
0462. Minimum Moves to Equal Array Elements II	Medium	Array Sorting Math	cpp			py
0464. Can I Win	Hard	Bit Manipulation Dynamic Programming Math Memorization Bitmask Game Theory	cpp
0468. Validate IP Address	Medium	String				py
0470. Implement Rand10() Using Rand7()	Medium	Math Rejection Sampling Probability and Statistics Randomized	cpp			py	go
0476. Number Complement	Easy	Bit Manipulation	cpp	java		py		kt
0477. Total Hamming Distance	Medium	Bit Manipulation	cpp			py
0478. Generate Random Point in a Circle	Medium	Math Geometry Rejection Sampling Randomized				py
0480. Sliding Window Median	Hard	Sliding Window	cpp	java		py
0482. License Key Formatting	Easy	String	cpp
0485. Max Consecutive Ones	Easy	Array	cpp			py
0492. Construct the Rectangle	Easy	Math	cpp
0494. Target Sum	Medium	Dynamic Programming Depth-first Search	cpp
0495. Teemo Attacking	Easy	Array	cpp
0496. Next Greater Element I	Easy	Stack	cpp			py
0498. Diagonal Traverse	Medium	Array Matrix Simulation	cpp			py		kt
0500. Keyboard Row	Easy	Hash Table	cpp					kt
0502. IPO	Hard	Greedy Array Sorting Heap	cpp
0503. Next Greater Element II	Medium	Stack	cpp			py
0504. Base 7	Easy	Math	cpp			py		kt
0506. Relative Ranks	Easy	Array	cpp
0507. Perfect Number	Easy	Math	cpp			py	go
0508. Most Frequent Subtree Sum	Medium	Hash Table Binary Tree Tree Depth-first Search				py
0509. Fibonacci Number	Easy	Array	cpp	java	js	py	go	kt
0513. Find Bottom Left Tree Value	Medium	Tree Depth-first Search Breadth-first Search	cpp			py		kt
0515. Find Largest Value in Each Tree Row	Medium	Binary Tree Tree Breadth-first Search Depth-first Search	cpp			py
0516. Longest Palindromic Subsequence	Medium	String Dynamic Programming	cpp			py
0517. Super Washing Machines	Hard	Array Greedy	cpp
0518. Coin Change 2	Medium	Dynamic Programming	cpp			py
0520. Detect Capital	Easy	String	cpp	java				kt
0521. Longest Uncommon Subsequence I	Easy	String	cpp			py
0523. Continuous Subarray Sum	Medium	Math Dynamic Programming	cpp			py
0524. Longest Word in Dictionary through Deleting	Medium	Array Two Pointers String Sort	cpp			py
0525. Contiguous Array	Medium	Hash Table	cpp			py
0526. Beautiful Arrangement	Medium	Bit Manipulation Array Dynamic Programming Backtracking	cpp
0530. Minimum Absolute Difference in BST	Easy	Binary Search Tree	cpp					kt
0532. K-diff Pairs in an Array	Medium	Array Sorting Binary Search Hash Table Two Pointers				py
0535. Encode and Decode TinyURL	Medium	Hash Table Design Hash Function				py
0537. Complex Number Multiplication	Medium	Math String	cpp	java
0539. Minimum Time Difference	Medium	Array String Math	cpp
0540. Single Element in a Sorted Array	Medium	Array Binary Search	cpp					kt
0541. Reverse String II	Easy	String	cpp					kt
0542. 01 Matrix	Medium	Array Dynamic Programming Breadth-first Search	cpp			py
0543. Diameter of Binary Tree	Easy	Tree					go
0547. Number of Provinces	Medium	Breadth-first Search Depth-first Search Union Find Graph	cpp	java		py		kt
0551. Student Attendance Record I	Easy	String	cpp
0552. Student Attendance Record II	Hard	Dynamic Programming Depth-first Search	cpp
0553. Optimal Division	Medium	Array Dynamic Programming Math	cpp
0554. Brick Wall	Hard	Hash Table	cpp			py
0560. Subarray Sum Equals K	Medium	Array Prefix Sum Hash Table	cpp	java		py
0561. Array Partition I	Easy	Array	cpp			py		kt
0566. Reshpae the Matrix	Easy	Array	cpp			py		kt
0567. Permutation in String	Medium	Two Pointers	cpp			py		kt
0572. Subtree of Another Tree	Easy	Tree	cpp			py		kt
0575. Distribute Candies	Easy	Array Hash Table	cpp
0576. Out of Boundary Paths	Medium	Dynamic Programming Depth-first Search	cpp
0581. Shortest Unsorted Continuous Subarray	Medium	Stack Greedy Array Two Pointers Sorting Monotonic Stack	cpp
0583. Delete Operation for Two Strings	Medium	String Dynamic Programming	cpp			py
0589. N-ary Tree Preorder Traversal	Easy	Stack Tree Depth-first Search	cpp			py
0590. N-ary Tree Postorder Traversal	Easy	Stack Tree Depth-first Search				py
0592. Fraction Addition and Subtraction	Medium	Math						kt
0594. Longest Harmonious Subsequence	Easy	Array Hash Table	cpp			py
0598. Range Addition II	Easy	Array Math	cpp				go
0599. Minimum Index Sum of Two Lists	Easy	Array String Hash Table	cpp			py
0605. Can Place Flowers	Easy	Array	cpp
0606. Construct String from Binary Tree	Easy	Tree Binary Tree String Depth-first Search	cpp
0611. Valid Triangle Number	Medium	Array	cpp					kt
0622. Design Circular Queue	Medium	Array Linked List Queue Design				py
0623. Add One Row to Tree	Medium	Binary Tree Tree Breadth-first Search Depth-first Search	cpp			py
0628. Maximum Product of Three Numbers	Easy	Array Math				py
0633. Sum of Square Numbers	Medium	Math	cpp			py
0636. Exclusive Time of Functions	Medium	Array Stack				py
0638. Shopping Offers	Medium	Bit Manipulation Array Dynamic Programming Backtracking	cpp
0639. Decode Ways II	Hard	String Dynamic Programming	cpp
0640. Solve the Equation	Medium	String Math Simulation	cpp			py
0641. Design Circular Deque	Medium	Array Linked List Queue Sort Design				py
0643. Maximum Average Subarray I	Easy	Array	cpp			py		kt
0646. Maximum Length of Pair Chain	Medium	Array Sorting Dynamic Programming Greedy	cpp	java		py		kt
0648. Replace Words	Medium	Hash Table Trie						kt
0650. 2 Keys Keyboard	Medium	Math Dynamic Programming	cpp	java	js	py	go	kt
0652. Find Duplicate Subtrees	Medium	Hash Table Binary Tree Tree Depth-first Search	cpp
0653. Two Sum IV - Input is a BST	Easy	Two Pointers Hash Table Binary Search Tree Tree Breadth-first Search Depth-first Search	cpp			py
0654. Maximum Binary Tree	Medium	Array Stack Binary Tree Tree Divide and Conquer	cpp			py
0655. Print Binary Tree	Medium	Binary Tree Tree Breadth-first Search Depth-first Search	cpp			py
0657. Robot Return to Origin	Easy	String	cpp				go
0658. Find K Closest Elements	Medium	Array Two Pointers Sorting Binary Search Heap	cpp			py
0661. Image Smoother	Easy	Array Matrix	cpp						rs
0662. Maximum Width of Binary Tree	Medium	Binary Tree Tree Breadth-first Search Depth-first Search	cpp			py
0665. Non-decreasing Array	Easy	Array	cpp			py		kt
0667. Beautiful Arrangement II	Medium	Array Math	cpp
0669. Trim a Binary Search Tree	Medium	Binary Tree Binary Search Tree Tree Depth-first Search	cpp			py
0670. Maximum Swap	Medium	Math Greedy				py
0672. Bulb Switcher II	Medium	Bit Manipulation Math Breadth-first Search Depth-first Search				py
0673. Number of Longest Increasing Subsequence	Medium	Array Dynamic Programming	cpp			py
0674. Longest Continuous Increasing Subsequence	Easy	Array	cpp			py
0678. Valid Parenthesis String	Medium	Stack Greedy String Dynamic Programming	cpp
0682. Baseball Game	Easy	Array Stack	cpp			py
0684. Redundant Connection	Medium	Tree Union Find Graph	cpp	java		py		kt
0686. Repeated String Match	Medium	String	cpp			py	go
0687. Longest Univalue Path	Medium	Binary Tree Tree Depth-first Search	cpp			py
0690. Employee Importance	Easy	Bepth-first Search Breadth-first Search Hash Table	cpp			py
0692. Top K Frequent Words	Medium	Heap Trie Hash Table	cpp			py
0693. Binary Number with Alternating Bits	Easy	Bit Manipulation	cpp	java		py	go	kt	rs
0695. Max Area of Island	Medium	Array Breadth-first Search Depth-first Search Union Find	cpp			py
0697. Degree of an Array	Easy	Array	cpp			py
0698. Partition to K Equal Sum Subsets	Medium	Dynamic Programming Backtracking						kt
0700. Search in a Binary Search Tree	Easy	Tree Binary Search Tree Binary Tree	cpp
0703. Kth Largest Element in a Stream	Easy	Heap Design	cpp			py
0704. Binary Search	Easy	Array Binary Search	cpp	java		py	go
0705. Design HashSet	Easy	Design Hash Table	cpp
0706. Design HashMap	Easy	Design Hash Table	cpp
0707. Design Linked List	Medium	Linked List Design				py
0709. To Lower Case	Easy	String	cpp			py	go
0710. Random Pick with Blacklist	Hard	Hash Table Math Binary Search Sorting				py
0713. Subarray Product Less Than K	Medium	Array Sliding Window	cpp			py
0714. Best Time to Buy and Sell Stock with Transaction Fee	Medium	Array Dynamic Programming Greedy				py
0717. 1-bit and 2-bit Characters	Easy	Array	cpp
0720. Longest Word in Dictionary	Easy	Trie Array String Hash Table	cpp			py	go
0721. Accounts Merge	Medium	Depth-first Search Union Find		java				kt
0724. Find Pivot Index	Easy	Array	cpp			py
0725. Split Linked List in Parts	Medium	Linked List	cpp
0728. Self Dividing Numbers	Easy	Math				py		kt
0729. My Calendar I	Medium	Design Binary Search Ordered Set	cpp			py	go
0733. Flood Fill	Easy	Depth-first Search	cpp			py		kt
0738. Monotone Increasing Digits	Medium	Greedy						kt
0740. Delete and Earn	Medium	Dynamic Programming	cpp			py	go
0743. Network Delay Time	Medium	Shortest Path Depth-first Search Breadth-first Search Heap Graph	cpp
0744. Find Smallest Letter Greater Than Target	Easy	Array Binary Search				py
0745. Prefix and Suffix Search	Hard	Trie						kt
0746. Min Cost Climbing Stairs	Easy	Array Dynamic Programming	cpp			py	go
0747. Largest Number At Least Twice of Others	Easy	Array	cpp			py	go	kt
0752. Open the Lock	Medium	Array String Hash Table Breadth-first Search	cpp			py
0760. Find Anagram Mappings	Easy	Array						kt
0762. Prime Number of Set Bits in Binary Representation	Easy	Bit Manipulation	cpp			py		kt
0765. Couples Holding Hands	Hard	Greedy Union Find Graph	cpp			py
0766. Toeplitz Matrix	Easy	Array	cpp			py
0768. Max Chunks To Make Sorted II	Hard	Array Sorting Greedy Stack Monotonic Stack	cpp	java		py
0771. Jewels and Stones	Easy	Hash Table						kt
0777. Swap Adjacent in LR String	Medium	Two Pointers String	cpp			py
0780. Reaching Points	Hard	Math	cpp			py	go	kt	rs
0781. Rabbits in Forest	Medium	Hash Table Math	cpp			py
0783. Minimum Distance Between BST Nodes	Easy	Binary Search Tree	cpp					kt
0784. Letter Case Permutation	Easy	Bit Manipulation Backtracking						kt
0785. Is Graph Bipartite	Medium	Breadth-first Search Depth-first Search Union Find Graph	cpp			py
0788. Rotated Digits	Easy	String						kt
0789. Escape The Ghosts	Medium	Math	cpp					kt
0791. Custom Sort String	Medium	String	cpp			py		kt
0796. Rotate String	Easy	String String Matching	cpp			py	go	kt	rs
0797. All Paths From Source to Target	Medium	Backtracking Breadth-first Search Depth-first Search Graph	cpp			py		kt
0802. Find Eventual Safe States	Medium	Breadth-first Search Depth-first Search Graph Topological Sort	cpp			py
0804. Unique Morse Code Words	Easy	Array String Hash Table	cpp			py
0806. Number of Lines To Write String	Easy	Array String	cpp				go		rs
0807. Max Increase to Keep City Skyline	Medium	Array Greedy	cpp			py
0810. Chalkboard XOR Game	Hard	Math	cpp			py
0811. Subdomain Visit Count	Medium	Array Counting String Hash Table				py
0812. Largest Triangle Area	Easy	Array Math Geometry	cpp			py
0814. Binary Tree Pruning	Medium	Binary Tree Tree Depth-first Search	cpp			py	go
0819. Most Common Word	Easy	Counting String Hash Table	cpp			py
0821. Shortest Distance to a Character	Easy	Array Two Pointers String	cpp
0824. Goat Latin	Easy	String	cpp			py
0825. Friends Of Appropriate Ages	Hard	Array Two Pointers Binary Search	cpp
0832. Flipping an Image	Easy	Array	cpp			py
0836. Rectangle Overlap	Easy	Math				py
0838. Push Dominoes	Medium	Two Pointers String Dynamic Programming	cpp
0841. Keys and Rooms	Medium	Breadth-first Search Depth-first Search Graph	cpp			py
0844. Backspace String Compare	Easy	Stack Two Pointers String Simulation	cpp
0846. Hand of Straights	Medium	Array Hash Table Greedy Sort	cpp
0847. Shortest Path Visiting All Nodes	Hard	Bit Manipulation Dynamic Programming Breadth-first Search Graph Bitmask	cpp			py
0850. Rectangle Area II	Hard	Array Line Sweep Ordered Set Segment Tree				py
0852. Peak Index in a Mountain Array	Easy	Binary Search	cpp			py
0856. Score of Parentheses	Medium	String Stack				py
0860. Lemonade Change	Easy	Greedy	cpp
0867. Transpose Matrix	Easy	Array	cpp			py
0868. Binary Gap	Easy	Math	cpp
0869. Reordered Power of 2	Medium	Math Counting Sorting	cpp
0870. Advantage Shuffle	Medium	Array Two Pointers Sorting Greedy	cpp			py
0872. Leaf-Similar Trees	Easy	Tree Depth-first Search	cpp			py
0875. Koko Eating Bananas	Medium	Array Binary Search	cpp			py
0876. Middle of the Linked List	Easy	Linked List					go
0883. Projection Area of 3D Shapes	Easy	Array Matrix Math Geometry				py
0884. Uncommon Words from Two Sentences	Easy	String Hash Table	cpp			py	go
0886. Possible Bipartition	Medium	Breadth-first Search Depth-first Search Union Find Graph	cpp			py
0888. Fair Candy Swap	Easy	Array	cpp			py
0890. Find and Replace Pattern	Medium	String	cpp			py
0896. Monotonic Array	Easy	Array	cpp
0897. Increasing Order Search Tree	Easy	Tree Depth-first Search Recursion	cpp			py
0905. Sort Array By Parity	Easy	Array Two Pointers Sorting	cpp			py
0908. Smallest Range I	Easy	Array Math				py
0913. Cat and Mouse	Hard	Dynamic Programming Math Breadth-first Search Graph	cpp
0917. Reverse Only Letters	Hard	Two Pointers String	cpp
0918. Maximum Sum Circular Subarray	Medium	Array Dynamic Programming	cpp			py
0921. Minimum Add to Make Parentheses Valid	Medium	Greedy Stack String	cpp			py
0926. Flip String to Monotone Increasing	Medium	String Dynamic Programming				py
0929. Unique Email Addresses	Easy	Array String Hash Table	cpp			py
0931. Minimum Falling Path Sum	Medium	Array Dynamic Programming				py
0933. Number of Recent Calls	Easy	Queue Design				py
0934. Shortest Bridge	Medium	Array Breadth-first Search Depth-first Search	cpp			py
0938. Range Sum of BST	Easy	Tree Depth-first Search Recursion	cpp			py
0942. DI String Match	Easy	Array Two Pointers String Math Greedy	cpp			py
0944. Delete Columns to Make Sorted	Easy	Array String	cpp			py
0945. Minimum Increment to Make Array Unique	Medium	Array	cpp			py	go
0946. Validate Stack Sequences	Medium	Array Stack Simulation	cpp	java		py	go
0951. Flip Equivalent Binary Trees	Medium	Tree	cpp			py
0953. Verifying an Alien Dictionary	Easy	Array String Hash Table	cpp
0954. Array of Doubled Pairs	Medium	Greedy Array Hash Table Sorting	cpp			py
0961. N-Repeated Element in Size 2N Array	Easy	Array Hash Table	cpp			py
0965. Univalued Binary Tree	Easy	Binary Tree Tree Breadth-first Search Depth-first Search	cpp			py
0969. Pancake Sorting	Medium	Array Two Pointers Two Pointers	cpp
0977. Squares of a Sorted Array	Easy	Array Two Points	cpp
0978. Longest Turbulent Subarray	Medium	Array Dynamic Programming Sliding Windows	cpp			py
0986. Interval List Intersections	Medium	Array Two Pointers	cpp
0989. Add to Array-Form of Integer	Easy	Array				py
0992. Subarrays with K Different Integers	Hard	Hash Table Two Pointers Sliding Window	cpp
0993. Cousins in Binary Tree	Easy	Tree Breadth-first Search	cpp
0995. Minimum Number of K Consecutive Bit Flips	Hard	Greedy Sliding Windows	cpp			py
0997. Find the Town Judge	Easy	Graph	cpp	java		py	go
0998. Maximum Binary Tree II	Medium	Binary Tree Tree	cpp			py
1004. Max Consecutive Ones III	Medium	Two Pointers Sliding Window	cpp			py
1005. Maximize Sum Of Array After K Negations	Easy	Array Greedy	cpp
1006. Clumsy Factorial	Medium	Stack Math Simulation	cpp			py
1009. Complement of Base 10 Integer	Easy	Bit Manipulation	cpp	java		py		kt
1011. Capacity To Ship Packages Within D Days	Medium	Array Binary Search	cpp			py
1013. Partition Array Into Three Parts With Equal Sum	Easy	Array					go
1014. Best Sightseeing Pair	Medium	Array Dynamic Programming				py
1020. Number of Enclaves	Medium	Array Breadth-first Search Depth-first Search Union Find	cpp			py
1021. Remove Outermost Parentheses	Hard	String Stack	cpp			py
1022. Sum of Root To Leaf Binary Numbers	Easy	Binary Tree Tree Depth-first Search	cpp			py
1029. Two City Scheduling	Medium	Greedy	cpp
1035. Uncrossed Lines	Hard	Array Dynamic Programming	cpp			py
1036. Escape a Large Maze	Hard	Array Hash Table Breadth-first Search Depth-first Search	cpp
1037. Valid Boomerang	Easy	Array Math Geometry	cpp			py
1042. Flower Planting With No Adjacent	Medium	Breadth-first Search Depth-first Search Graph	cpp			py
1047. Remove All Adjacent Duplicates In String	Easy	Stack	cpp			py
1051. Height Checker	Easy	Array Sorting Counting Sort				py
1052. Grumpy Bookstore Owner	Medium	Array Sliding Window	cpp			py
1078. Occurrences After Bigram	Easy	String	cpp			py	go
1081. Smallest Subsequence of Distinct Characters	Medium	Stack Greedy String	cpp
1089. Duplicate Zeros	Easy	Array Two Pointers				py
1091. Shortest Path in Binary Matrix	Medium	Array Breadth-first Search	cpp			py
1103. Distribute Candies to People	Easy	Math	cpp	java
1108. Defanging an IP Address	Easy	String	cpp			py
1109. Corporate Flight Bookings	Medium	Array `Prefix Sum	cpp
1128. Number of Equivalent Domino Pairs	Easy	Array	cpp			py
1129. Shortest Path with Alternating Colors	Medium	Breadth-first Search Graph	cpp			py
1137. N-th Tribonacci Number	Easy	Memoization Math Dynamic Programming	cpp	java		py	go
1143. Longest Common Subsequence	Medium	Dynamic Programming	cpp			py
1154. Day of the Year	Easy	String Math	cpp			py	go
1160. Find Words That Can Be Formed by Characters	Easy	Array Hash Table					go
1161. Maximum Level Sum of a Binary Tree	Medium	Binary Tree Tree Breadth-first Search Depth-first Search	cpp			py
1162. As Far from Land as Possible	Medium	Array Dynamic Programming Breadth-first Search	cpp			py
1178. Number of Valid Words for Each Puzzle	Hard	Hash Table Bit Manipulation	cpp
1184. Distance Between Bus Stops	Easy	Array	cpp			py
1185. Day of the Week	Easy	Math	cpp			py	go
1189. Maximum Number of Balloons	Easy	String Hash Table	cpp
1190. Reverse Substrings Between Each Pair of Parentheses	Medium	Stack	cpp			py
1200. Minimum Absolute Difference	Easy	Array Sorting	cpp			py	go
1206. Design Skiplist	Hard	Design Linked List	cpp
1208. Get Equal Substrings Within Budget	Medium	Array Sliding Window	cpp			py
1217. Minimum Cost to Move Chips to The Same Position	Easy	Array Math Greedy	cpp			py	go
1218. Longest Arithmetic Subsequence of Given Difference	Medium	Array Hash Table Dynamic Programming	cpp
1220. Count Vowels Permutation	Hard	Dynamic Programming	cpp
1221. Split a String in Balanced Strings	Easy	Greedy String Counting	cpp	java		py	go
1232. Check If It Is a Straight Line	Easy	Array Geometry Math	cpp	java		py
1254. Number of Closed Islands	Medium	Array Breadth-first Search Depth-first Search Union Find	cpp			py
1260. Shift 2D Grid	Easy	Array Matrix Simulation	cpp			py
1281. Subtract the Product and Sum of Digits of an Integer	Easy	Math	cpp	java		py	go
1282. Group the People Given the Group Size They Belong To	Medium	Array Hash Table	cpp	java		py
1290. Convert Binary Number in a Linked List to Integer	Easy	Linked List Math	cpp	java		py	go
1295. Find Numbers with Even Number of Digits	Easy	Array	cpp			py
1302. Deepest Leaves Sum	Medium	Binary Tree Tree Breadth-first Search Depth-first Search				py
1305. All Elements in Two Binary Search Trees	Medium	Binary Search Tree Tree Breadth-first Search Depth-first Search Sorting				py
1306. Jump Game III	Medium	Array Breadth-first Search Depth-first Search	cpp			py
1309. Decrypt String from Alphabet to Integer Mapping	Easy	String	cpp			py
1310. XOR Queries of a Subarray	Hard	Bit Manipulation	cpp			py
1313. Decompress Run-Length Encoded List	Easy	Array	cpp			py
1314. Matrix Block Sum	Medium	Array Matrix Prefix Sum				py
1319. Number of Operations to Make Network Connected	Medium	Breadth-first Search Depth-first Search Union Find Graph	cpp			py
1331. Rank Transform of an Array	Easy	Array Sorting Hash Table	cpp			py	go
1337. The K Weakest Rows in a Matrix	Easy	Array Binary Search Matrix Sorting Heap	cpp			py	go
1342. Number of Steps to Reduce a Number to Zero	Easy	Bit Manipulation Math	cpp			py	go
1365. How Many Numbers Are Smaller Than the Current Number	Easy	Array Counting Sorting Hash Table	cpp
1370. Increasing Decreasing String	Easy	Counting String Hash Table	cpp			py
1374. Generate a String With Characters That Have Odd Counts	Easy	String	cpp			py	go
1376. Time Needed to Inform All Employees	Medium	Tree Breadth-first Search Depth-first Search	cpp			py
1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree	Easy	Binary Tree Tree Breadth-first Search Depth-first Search	cpp			py
1380. Lucky Numbers in a Matrix	Easy	Array	cpp
1389. Create Target Array in the Given Order	Easy	Array Simulation	cpp			py
1403. Minimum Subsequence in Non-Increasing Order	Easy	Array Sorting Greedy	cpp			py
1408. String Matching in an Array	Easy	String String Matching	cpp			py
1413. Minimum Value to Get Positive Step by Step Sum	Easy	Array Prefix Sum	cpp			py
1414. Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	Medium	Greedy	cpp
1417. Reformat The String	Easy	String				py
1422. Maximum Score After Splitting a String	Easy	String	cpp			py
1423. Maximum Points You Can Obtain from Cards	Medium	Array Dynamic Programming Sliding Window	cpp			py
1431. Kids With the Greatest Number of Candies	Easy	Array	cpp	java		py
1436. Destination City	Easy	String Hash Table	cpp
1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Medium	Array Sliding Window	cpp			py
1441. Build an Array With Stack Operations	Medium	Array Stack Simulation	cpp			py
1442. Count Triplets That Can Form Two Arrays of Equal XOR	Medium	Array Bit Manipulation Math	cpp			py
1446. Consecutive Characters	Easy	String	cpp
1447. Simplified Fractions	Medium	String Math	cpp
1450. Number of Students Doing Homework at a Given Time	Easy	Array	cpp			py
1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence	Easy	String String Matching	cpp			py
1460. Make Two Arrays Equal by Reversing Sub-arrays	Easy	Array Sorting Hash Table	cpp			py
1464. Maximum Product of Two Elements in an Array	Easy	Array	cpp	java		py
1466. Reorder Routes to Make All Paths Lead to the City Zero	Medium	Breadth-first Search Depth-first Search Graph	cpp			py
1470. Shuffle the Array	Easy	Array	cpp	java		py	go
1475. Final Prices With a Special Discount in a Shop	Easy	Array Stack Monotonic Stack	cpp			py
1480. Running Sum of 1d Array	Easy	Array	cpp
1486. XOR Operation in an Array	Easy	Array Bit Manipulation	cpp			py
1512. Number of Good Pairs	Easy	Array Counting Hash Table Math	cpp			py
1518. Water Bottles	Hard	Math	cpp
1528. Shuffle String	Easy	Array String	cpp			py
1557. Minimum Number of Vertices to Reach All Nodes	Medium	Graph	cpp			py
1567. Maximum Length of Subarray With Positive Product	Medium	Array Dynamic Programming Greedy				py
1572. Matrix Diagonal Sum	Easy	Array Matrix	cpp			py
1576. Replace All s to Avoid Consecutive Repeating Characters	Easy	String	cpp
1582. Special Positions in a Binary Matrix	Easy	Array Matrix	cpp			py
1583. Count Unhappy Friends	Medium	Array Simulation	cpp
1584. Min Cost to Connect All Points	Medium	Union Find	cpp			py
1588. Sum of All Odd Length Subarrays	Easy	Array Prefix Sum	cpp
1592. Rearrange Spaces Between Words	Easy	String				py
1598. Crawler Log Folder	Easy	Array String Stack	cpp			py
1603. Design Parking System	Easy	Design	cpp			py
1608. Special Array With X Elements Greater Than or Equal X	Easy	Array Sorting Binary Search	cpp			py
1609. Even Odd Three	Medium	Binary Tree Tree Breadth-first Search	cpp
1614. Maximum Nesting Depth of the Parentheses	Easy	String Stack	cpp			py	go
1615. Maximal Network Rank	Medium	Graph	cpp			py
1619. Mean of Array After Removing Some Elements	Easy	Array Sorting	cpp			py
1624. Largest Substring Between Two Equal Characters	Easy	String Hash Table	cpp			py
1629. Slowest Key	Easy	Array String	cpp			py	go
1636. Sort Array by Increasing Frequency	Easy	Array Sorting Hash Table	cpp			py
1646. Get Maximum in Generated Array	Easy	Array Dynamic Programming	cpp
1652. Defuse the Bomb	Easy	Array				py
1654. Minimum Jumps to Reach Home	Medium	Array Dynamic Programming Breadth-first Search Depth-first Search	cpp			py
1656. Design an Ordered Stream	Easy	Array Hash Table Design Data Stream				py
1662. Check If Two String Arrays are Equivalent	Easy	Array String	cpp	java		py
1672. Richest Customer Wealth	Easy	Array Matrix	cpp			py			rs
1678. Goal Parser Interpretation	Easy	String	cpp			py
1684. Count the Number of Consistent Strings	Easy	Array String Hash Table Bit Manipulation	cpp	java		py
1688. Count of Matches in Tournament	Easy	Math	cpp			py	go
1689. Partitioning Into Minimum Number Of Deci-Binary Numbers	Easy	String Greedy	cpp			py
1694. Reformat Phone Number	Easy	String				py
1704. Determine if String Halves Are Alike	Easy	Counting String				py
1710. Maximum Units on a Truck	Easy	Array Sorting Greedy	cpp			py
1716. Calculate Money in Leetcode Bank	Easy	Math	cpp
1720. Decode XORed Array	Easy	Bit Manipulation	cpp			py
1723. Find Minimum Time to Finish All Jobs	Hard	Recursion Backtracking	cpp			py
1725. Number Of Rectangles That Can Form The Largest Square	Easy	Array	cpp
1732. Find the Highest Altitude	Easy	Array Prefix Sum	cpp			py	go
1734. Decode XORed Permutation	Hard	Bit Manipulation	cpp			py
1738. Find Kth Largest XOR Coordinate Value	Medium	Array	cpp
1748. Sum of Unique Elements	Easy	Array Hash Table	cpp
1763. Longest Nice Substring	Easy	String Hash Table Bit Manipulation	cpp
1768. Merge Strings Alternately	Easy	Two Pointers String	cpp			py
1773. Count Items Matching a Rule	Easy	Array String	cpp			py
1779. Find Nearest Point That Has the Same X or Y Coordinate	Easy	Array	cpp			py
1790. Check if One String Swap Can Make Strings Equal	Easy	String Counting Hash Table	cpp			py
1791. Find Center of Star Graph	Easy	Graph	cpp
1800. Maximum Ascending Subarray Sum	Easy	Array	cpp			py
1812. Determine Color of a Chessboard Square	Easy	String Math	cpp			py
1816. Truncate Sentence	Easy	Array String	cpp
1822. Sign of the Product of an Array	Easy	Array Math	cpp	java		py
1823. Find the Winner of the Circular Game	Medium	Array Recursion Queue Math Simulation	cpp			py
1827. Minimum Operations to Make the Array Increasing	Easy	Array Greedy	cpp
1828. Queries on Number of Points Inside a Circle	Easy	Array Math	cpp			py
1832. Check if the Sentence Is Pangram	Easy	String Hash Table	cpp			py
1844. Replace All Digits with Characters	Easy	String	cpp
1880. Check if Word Equals Summation of Two Words	Easy	String	cpp			py
1894. Find the Student that Will Replace the Chalk	Medium	Array Binary Search Prefix Sum Simulation	cpp
1905. Count Sub Islands	Medium	Array Breadth-first Search Depth-first Search Union Find	cpp			py
1920. Build Array from Permutation	Easy	Array Simulation	cpp			py
1926. Nearest Exit from Entrance in Maze	Medium	Array Breadth-first Search	cpp			py
1929. Concatenation of Array	Easy	Array	cpp			py
1941. Check if All Characters Have Equal Number of Occurrences	Easy	Counting String Hash Table				py
1967. Number of Strings That Appear as Substrings in Word	Easy	String	cpp			py
1984. Minimum Difference Between Highest and Lowest of K Scores	Easy	Array Sorting Sliding Window	cpp			py
1995. Count Special Quadruplets	Easy	Array	cpp			py	go
1996. The Number of Weak Characters in the Game	Medium	Array Greedy Stack	cpp
2000. Reverse Prefix of Word	Easy	Two Pointers String	cpp			py
2006. Count Number of Pairs With Absolute Difference K	Hard	Array Hash Table	cpp
2011. Final Value of Variable After Performing Operations	Easy	Array String Simulation	cpp			py
2013. Detect Squares	Medium	Array Hash Table	cpp
2016. Maximum Difference Between Increasing Elements	Easy	Array	cpp
2022. Convert 1D Array Into 2D Array	Easy	Array	cpp			py	go
2024. Maximize the Confusion of an Exam	Medium	Prefix Sum String Prefix Sum Sliding Window	cpp			py
2027. Minimum Moves to Convert String	Easy	String Greedy	cpp			py
2028. Find Missing Observations	Medium	Array Matrix	cpp
2032. Two Out of Three	Easy	Array Hash Table	cpp			py
2037. Minimum Number of Moves to Seat Everyone	Easy	Array Sorting	cpp			py
2038. Remove Colored Pieces if Both Neighbors are the Same Color	Medium	Greedy Math String	cpp
2039. The Time When the Network Becomes Idle	Medium	Array Breadth-first Search Graph				py
2042. Check if Numbers Are Ascending in a Sentence	Easy	String				py
2043. Simple Bank System	Medium	Array Hash Table Design simulation	cpp			py	go		rs
2044. Count Number of Maximum Bitwise-OR Subsets	Medium	Array Backtracking Bit Manipulation	cpp			py
2047. Number of Valid Words in a Sentence	Easy	String	cpp
2049. Count Nodes With the Highest Score	Medium	Array Binary Tree Tree Depth-first Search				py
2053. Kth Distinct String in an Array	Easy	Array Counting String Hash Table	cpp			py
2055. Plates Between Candles	Medium	Array String Binary Search	cpp			py
2089. Find Target Indices After Sorting Array	Easy	Array Sorting Binary Search	cpp			py
2114. Maximum Number of Words Found in Sentences	Easy	Array String	cpp			py
2160. Minimum Sum of Four Digit Number After Splitting Digits	Easy	Math Greedy Sorting	cpp			py
2169. Count Operations to Obtain Zero	Easy	Math	cpp
2180. Count Integers With Even Digit Sum	Easy	Math Simulation	cpp
2181. Merge Nodes in Between Zeros	Medium	Linked List Simulation	cpp
2182. Construct String With Repeat Limit	Medium	Greedy String Counting Heap	cpp
2183. Count Array Pairs Divisible by K	Hard	Array Math Number Theory	cpp
2185. Counting Words With a Given Prefix	Easy	Array String	cpp			py
2210. Count Hills and Valleys in an Array	Easy	Array				py
2215. Find the Difference of Two Arrays	Easy	Array Hash Table				py
2216. Minimum Deletions to Make Array Beautiful	Medium	Array Greedy Stack				py
2217. Find Palindrome With Fixed Length	Medium	Array Math				py
2220. Minimum Bit Flips to Convert Number	Easy	Bit Manipulation	cpp			py
2224. Minimum Number of Operations to Convert Time	Easy	String Greedy				py
2225. Find Players With Zero or One Losses	Medium	Array Hash Table Counting Sorting				py
2235. Add Two Integers	Easy	Math	cpp	java	js	py	go	kt	rs
2236. Root Equals Sum of Children	Easy	Binary Tree Tree	cpp			py
2278. Percentage of Letter in String	Easy	String	cpp			py
2283. Check if Number Has Equal Digit Count and Digit Value	Easy	Counting String Hash Table	cpp			py
2287. Rearrange Characters to Make Target String	Easy	Counting String Hash Table	cpp			py
2288. Apply Discount to Prices	Medium	String				py
2290. Minimum Obstacle Removal to Reach Corner	Hard	Array Breadth-first Search Graph Matrix Shortest Path				py
2293. Min Max Game	Easy	Array Simulation	cpp			py
2303. Calculate Amount Paid in Taxes	Easy	Array Simulation				py
2309. Greatest English Letter in Upper and Lower Case	Easy	String Hash Table	cpp			py
2315. Count Asterisks	Easy	String	cpp	java		py	go
2319. Check if Matrix Is X-Matrix	Easy	Array Matrix	cpp			py
2325. Decode the Message	Medium	String Hash Table				py
2331. Evaluate Boolean Binary Tree	Easy	Binary Tree Tree Depth-first Search	cpp			py
2335. Minimum Amount of Time to Fill Cups	Easy	Array Sorting Greedy Heap	cpp			py	go
2341. Maximum Number of Pairs in Array	Easy	Array Counting Hash Table	cpp			py
2347. Best Poker Hand	Easy	Array Counting Hash Table	cpp			py
2351. First Letter to Appear Twice	Easy	Counting String Hash Table	cpp			py
2357. Make Array Zero by Subtracting Equal Amounts	Easy	Array Sorting Hash Table Greedy Heap Simulation	cpp	java		py	go
2363. Merge Similar Items	Easy	Array Sorting Hash Table	cpp			py
2367. Number of Arithmetic Triplets	Easy	Array Two Pointers Hash Table	cpp			py
2373. Largest Local Values in a Matrix	Easy	Array Matrix	cpp	java		py	go
2379. Minimum Recolors to Get K Consecutive Black Blocks	Easy	String Sliding Window	cpp			py
2396. Strictly Palindromic Number	Medium	Two Pointers Math	cpp			py
2413. Smallest Even Multiple	Easy	Math	cpp			py
2418. Sort the People	Easy	Array String Sorting Hash Table				py
2469. Convert the Temperature	Easy	Math	cpp			py
2485. Find the Pivot Integer	Easy	Prefix Sum Math	cpp			py
2490. Circular Sentence	Easy	String	cpp			py
2496. Maximum Value of a String in an Array	Easy	Array String				py
2500. Delete Greatest Value in Each Row	Easy	Array Matrix Sorting	cpp			py
2520. Count the Digits That Divide a Number	Easy	Math	cpp			py
2529. Maximum Count of Positive Integer and Negative Integer	Easy	Array Counting Binary Search	cpp			py
2535. Difference Between Element Sum and Digit Sum of an Array	Easy	Array Math	cpp	java		py	go
2544. Alternating Digit Sum	Easy	Math	cpp			py	go
2553. Separate the Digits in an Array	Easy	Array Simulation	cpp			py
2574. Left and Right Sum Differences	Easy	Array Prefix Sum	cpp	java		py	go

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