my leetcode solutions

• 0001. Two Sum
• 0002. Add Two Numbers
• 0003. Longest Substring Without Repeating Characters
• 0004. Median of Two Sorted Arrays
• 0005. Longest Palindromic Substring
• 0007. Reverse Integer
• 0008. String to Integer (atoi)
• 0009. Palindrome Number
• 0011. Container With Most Water
• 0012. Integer to Roman
• 0013. Roman to Integer
• 0014. Longest Common Prefix
• 0017. Letter Combinations of a Phone Number
• 0020. Valid Parentheses
• 0021. Merge Two Sorted Lists
• 0022. Generate Parentheses
• 0023. Merge k Sorted Lists
• 0024. Swap Nodes in Pairs
• 0028. Implement strStr()
• 0031. Next Permutation
• 0032. Longest Valid Parentheses
• 0036. Valid Sudoku
• 0037. Sudoku Solver
• 0038. Count and Say
• 0039. Combination Sum
• 0040. Combination Sum II
• 0041. First Missing Positive
• 0046. Permutations
• 0047. Permutations II
• 0048. Rotate Image
• 0049. Group Anagrams
• 0050. Pow(x, n)
• 0051. N-Queens
• 0052. N-Queens II
• 0053. Maximum Subarray
• 0055. Jump Game
• 0056. Merge Intervals
• 0057. Insert Interval
• 0058. Length of Last Word
• 0061. Rotate List
• 0062. Unique Paths
• 0063. Unique Paths II
• 0064. Minimum Path Sum
• 0065. Valid Number
• 0066. Plus One
• 0067. Add Binary
• 0070. Climbing Stairs
• 0071. Simplify Path
• 0072. Edit Distance
• 0073. Set Matrix Zeroes
• 0075. Sort Colors
• 0076. Minimum Window Substring
• 0077. Combinations
• 0078. Subsets
• 0079. Word Search
• 0082. Remove Duplicates from Sorted List II
• 0083. Remove Duplicates from Sorted List
• 0084. Largest Rectangle in Histogram
• 0085. Maximal Rectangle
• 0090. Subsets II
• 0093. Restore IP Addresses
• 0094. Binary Tree Inorder Traversal
• 0096. Unique Binary Search Trees
• 0098. Validate Binary Search Tree
• 0100. Same Tree
• 0101. Symmetric Tree
• 0102. Binary Tree Level Order Traversal
• 0104. Maximum Depth of Binary Tree
• 0105. Construct Binary Tree from Preorder and Inorder Traversal
• 0106. Construct Binary Tree from Inorder and Postorder Traversal
• 0107. Binary Tree Level Order Traversal II
• 0108. Convert Sorted Array to Binary Search Tree
• 0109. Convert Sorted List to Binary Search Tree
• 0110. Balanced Binary Tree
• 0111. Minimum Depth of Binary Tree
• 0112. Path Sum
• 0113. Path Sum II
• 0114. Flatten Binary Tree to Linked List
• 0115. Distinct Subsequences
• 0116. Populating Next Right Pointers in Each Node
• 0117. Populating Next Right Pointers in Each Node II
• 0120. Triangle
• 0121. Best Time to Buy and Sell Stock
• 0122. Best Time to Buy and Sell Stock II
• 0123. Best Time to Buy and Sell Stock III
• 0125. Valid Palindrome
• 0128. Longest Consecutive Sequence
• 0129. Sum Root to Leaf Numbers
• 0130. Surrounded Regions
• 0131. Palindrome Partitioning
• 0132. Palindrome Partitioning II
• 0133. Clone Graph
• 0134. Gas Station
• 0135. Candy
• 0136. Single Number
• 0137. Single Number II
• 0138. Copy List with Random Pointer
• 0139. Word Break
• 0140. Word Break II
• 0141. Linked List Cycle
• 0142. Linked List Cycle II
• 0144. Binary Tree Preorder Traversal
• 0145. Binary Tree Postorder Traversal
• 0146. LRU Cache
• 0150. Evaluate Reverse Polish Notation
• 0151. Reverse Words in a String
• 0152. Maximum Product Subarray
• 0153. Find Minimum in Rotated Sorted Array
• 0154. Find Minimum in Rotated Sorted Array II
• 0155. Min Stack
• 0156. Binary Tree Upside Down
• 0157. Read N Characters Given Read4
• 0158. Read N Characters Given Read4 II - Call multiple times
• 0160. Intersection of Two Linked Lists
• 0161. One Edit Distance
• 0162. Find Peak Element
• 0163. Missing Ranges
• 0164. Maximum Gap
• 0165. Compare Version Numbers
• 0167. Two Sum II - Input array is sorted
• 0168. Excel Sheet Column Title
• 0169. Majority Element
• 0171. Excel Sheet Column Number
• 0172. Factorial Trailing Zeroes
• 0174. Dungeon Game
• 0179. Largest Number
• 0187. Repeated DNA Sequences
• 0188. Best Time to Buy and Sell Stock IV
• 0189. Rotate Array
• 0190. Reverse Bits
• 0191. Number of 1 Bits
• 0198. House Robber
• 0199. Binary Tree Right Side View
• 0200. Number of Islands
• 0201. Bitwise AND of Numbers Range
• 0202. Happy Number
• 0203. Remove Linked List Elements
• 0204. Count Primes
• 0205. Isomorphic Strings
• 0206. Reverse Linked List
• 0207. Course Schedule
• 0208. Implement Trie (Prefix Tree)
• 0209. Minimum Size Subarray Sum
• 0210. Course Schedule II
• 0211. Add and Search Word - Data structure design
• 0212. Word Search II
• 0213. House Robber II
• 0214. Shortest Palindrome
• 0215. Kth Largest Element in an Array
• 0216. Combination Sum III
• 0217. Contains Duplicate
• 0218. The Skyline Problem
• 0219. Contains Duplicate II
• 0220. Contains Duplicate III
• 0221. Maximal Square
• 0222. Count Complete Tree Nodes
• 0224. Basic Calculator
• 0225. Implement Stack using Queues
• 0226. Invert Binary Tree
• 0227. Basic Calculator II
• 0228. Summary Ranges
• 0229. Majority Element II
• 0230. Kth Smallest Element in a BST
• 0231. Power of Two
• 0232. Implement Queue using Stacks
• 0234. Palindrome Linked List
• 0235. Lowest Common Ancestor of a Binary Search Tree
• 0236. Lowest Common Ancestor of a Binary Tree
• 0237. Delete Node in a Linked List
• 0238. Product of Array Except Self
• 0239. Sliding Window Maximum
• 0240. Search a 2D Matrix II
• 0241. Different Ways to Add Parentheses
• 0242. Valid Anagram
• 0243. Shortest Word Distance
• 0244. Shortest Word Distance II
• 0245. Shortest Word Distance III
• 0246. Strobogrammatic Number
• 0249. Group Shifted Strings
• 0250. Count Univalue Subtrees
• 0251. Flatten 2D Vector
• 0252. Meeting Rooms
• 0253. Meeting Rooms II
• 0254. Factor Combinations
• 0255. Verify Preorder Sequence in Binary Search Tree
• 0256. Paint House
• 0257. Binary Tree Paths
• 0258. Add Digits
• 0260. Single Number III
• 0263. Ugly Number
• 0264. Ugly Number II
• 0265. Paint House II
• 0266. Palindrome Permutation
• 0267. Palindrome Permutation II
• 0268. Missing Number
• 0269. Alien Dictionary
• 0270. Closest Binary Search Tree Value
• 0274. H-Index
• 0275. H-Index II
• 0276. Paint Fence
• 0277. Find the Celebrity
• 0278. First Bad Version
• 0279. Perfect Squares
• 0280. Wiggle Sort
• 0283. Move Zeroes
• 0284. Peeking Iterator
• 0285. Inorder Successor in BST
• 0286. Walls and Gates
• 0287. Find the Duplicate Number
• 0288. Unique Word Abbreviation
• 0289. Game of Life
• 0290. Word Pattern
• 0292. Nim Game
• 0293. Flip Game
• 0294. Flip Game II
• 0295. Find Median from Data Stream
• 0296. Best Meeting Point
• 0297. Serialize and Deserialize Binary Tree
• 0299. Bulls and Cows
• 0300. Longest Increasing Subsequence
• 0301. Remove Invalid Parentheses
• 0303. Range Sum Query - Immutable
• 0304. Range Sum Query 2D - Immutable
• 0306. Additive Number
• 0307. Range Sum Query - Mutable.cpp
• 0310. Minimum Height Trees
• 0311. Sparse Matrix Multiplication
• 0312. Burst Balloons
• 0313. Super Ugly Number
• 0315. Count of Smaller Numbers After Self
• 0317. Shortest Distance from All Buildings
• 0318. Maximum Product of Word Lengths
• 0319. Bulb Switcher
• 0320. Generalized Abbreviation
• 0322. Coin Change
• 0324. Wiggle Sort II
• 0325. Maximum Size Subarray Sum Equals k
• 0326. Power of Three
• 0327. Count of Range Sum
• 0328. Odd Even Linked List
• 0330. Patching Array
• 0331. Verify Preorder Serialization of a Binary Tree
• 0332. Reconstruct Itinerary
• 0333. Largest BST Subtree
• 0334. Increasing Triplet Subsequence
• 0337. House Robber III
• 0338. Counting Bits
• 0339. Nested List Weight Sum
• 0340. Longest Substring with At Most K Distinct Characters
• 0341. Flatten Nested List Iterator
• 0342. Power of Four
• 0343. Integer Break
• 0344. Reverse String
• 0345. Reverse Vowels of a String
• 0346. Moving Average from Data Stream
• 0347. Top K Frequent Elements
• 0348. Design Tic-Tac-Toe
• 0349. Intersection of Two Arrays
• 0350. Intersection of Two Arrays II
• 0351. Android Unlock Patterns
• 0352. Data Stream as Disjoint Intervals
• 0354. Russian Doll Envelopes
• 0355. Design Twitter
• 0359. Logger Rate Limiter
• 0361. Bomb Enemy
• 0362. Design Hit Counter
• 0363. Max Sum of Rectangle No Larger Than K
• 0364. Nested List Weight Sum II
• 0365. Water and Jug Problem
• 0366. Find Leaves of Binary Tree
• 0367. Valid Perfect Square
• 0368. Largest Divisible Subset
• 0369. Plus One Linked List
• 0370. Range Addition
• 0371. Sum of Two Integers
• 0373. Find K Pairs with Smallest Sums
• 0374. Guess Number Higher or Lower
• 0375. Guess Number Higher or Lower II
• 0376. Wiggle Subsequence
• 0377. Combination Sum IV
• 0378. Kth Smallest Element in a Sorted Matrix
• 0379. Design Phone Directory
• 0380. Insert Delete GetRandom O(1)
• 0381. Insert Delete GetRandom O(1) - Duplicates allowed
• 0382. Linked List Random Node
• 0383. Ransom Note
• 0384. Shuffle an Array
• 0385. Mini Parser
• 0386. Lexicographical Numbers
• 0387. First Unique Character in a String
• 0388. Longest Absolute File Path
• 0389. Find the Difference
• 0390. Elimination Game
• 0392. Is Subsequence
• 0393. UTF-8 Validation
• 0394. Decode String
• 0395. Longest Substring with At Least K Repeating Characters
• 0396. Rotate Function
• 0397. Integer Replacement
• 0398. Random Pick Index
• 0399. Evaluate Division
• 0401. Binary Watch.cpp
• 0402. Remove K Digits.cpp
• 0403. Frog Jump.cpp
• 0404. Sum of Left Leaves.cpp
• 0405. Convert a Number to Hexadecimal.cpp
• 0406. Queue Reconstruction by Height.cpp
• 0407. Trapping Rain Water II.cpp
• 0408. Valid Word Abbreviation.cpp
• 0409. Longest Palindrome.cpp
• 0410. Split Array Largest Sum.cpp
• 0412. Fizz Buzz.cpp
• 0413. Arithmetic Slices.cpp
• 0414. Third Maximum Number.cpp
• 0415. Add Strings.cpp
• 0416. Partition Equal Subset Sum.cpp
• 0417. Pacific Atlantic Water Flow.cpp
• 0419. Battleships in a Board.cpp
• 0421. Maximum XOR of Two Numbers in an Array.cpp
• 0422. Valid Word Square.cpp
• 0423. Reconstruct Original Digits from English.cpp
• 0424. Longest Repeating Character Replacement.cpp
• 0425. Word Squares.cpp
• 0426. Convert Binary Search Tree to Sorted Doubly Linked List.cpp
• 0427. Construct Quad Tree.cpp
• 0428. Serialize and Deserialize N-ary Tree.cpp
• 0429. N-ary Tree Level Order Traversal.cpp
• 0430. Flatten a Multilevel Doubly Linked List.cpp
• 0431. Encode N-ary Tree to Binary Tree.cpp
• 0433. Minimum Genetic Mutation.cpp
• 0434. Number of Segments in a String.cpp
• 0435. Non-overlapping Intervals.cpp
• 0436. Find Right Interval.cpp
• 0437. Path Sum III.cpp
• 0438. Find All Anagrams in a String.cpp
• 0439. Ternary Expression Parser.cpp
• 0441. Arranging Coins.cpp
• 0442. Find All Duplicates in an Array.cpp
• 0443. String Compression.cpp
• 0445. Add Two Numbers II.cpp
• 0447. Number of Boomerangs.cpp
• 0448. Find All Numbers Disappeared in an Array.cpp
• 0449. Serialize and Deserialize BST.cpp
• 0452. Minimum Number of Arrows to Burst Balloons.cpp
• 0453. Minimum Moves to Equal Array Elements.cpp
• 0455. Assign Cookies.cpp
• 0456. 132 Pattern.cpp
• 0458. Poor Pigs.cpp
• 0459. Repeated Substring Pattern.cpp
• 0460. LFU Cache.cpp
• 0461. Hamming Distance.cpp
• 0462. Minimum Moves to Equal Array Elements II.cpp
• 0463. Island Perimeter.cpp
• 0464. Can I Win.cpp
• 0470. Implement Rand10() Using Rand7().cpp
• 0478. Generate Random Point in a Circle.cpp
• 0484. Find Permutation.cpp
• 0485. Max Consecutive Ones.cpp
• 0486. Predict the Winner.cpp
• 0487. Max Consecutive Ones II.cpp
• 0493. Reverse Pairs.cpp
• 0494. Target Sum.cpp
• 0495. Teemo Attacking
• 0504. Base 7.cpp
• 0650. 2 Keys Keyboard.cpp
• 0651. 4 Keys Keyboard.cpp
• 0654. Maximum Binary Tree
• 0695. Max Area of Island
• 0697. Degree of an Array
• 0700. Search in a Binary Search Tree
• 0701. Insert into a Binary Search Tree
• 0703. Kth Largest Element in a Stream
• 0704. Binary Search
• 0709. To Lower Case
• 0712. Minimum ASCII Delete Sum for Two Strings
• 0726. Number of Atoms
• 0729. My Calendar I
• 0739. Daily Temperatures
• 0740. Delete and Earn
• 0763. Partition Labels
• 0784. Letter Case Permutation
• 0789. Escape The Ghosts
• 0791. Custom Sort String
• 0797. All Paths From Source to Target
• 0799. Champagne Tower
• 0801. Minimum Swaps To Make Sequences Increasing
• 0802. Find Eventual Safe States
• 0804. Unique Morse Code Words
• 0806. Number of Lines To Write String
• 0807. Max Increase to Keep City Skyline
• 0820. Short Encoding of Words
• 0821. Shortest Distance to a Character
• 0822. Card Flipping Game
• 0837. New 21 Game
• 0845. Longest Mountain in Array
• 0856. Score of Parentheses
• 0859. Buddy Strings
• 0860. Lemonade Change
• 0861. Score After Flipping Matrix
• 0867. Transpose Matrix
• 0868. Binary Gap
• 0870. Advantage Shuffle
• 0875. Koko Eating Bananas
• 0877. Stone Game
• 0885. Boats to Save People
• 0895. Maximum Frequency Stack.cpp
• 0916. Word Subsets
• 0917. Reverse Only Letters
• 0921. Minimum Add to Make Parentheses Valid
• 0922. Sort Array By Parity II
• 0925. Long Pressed Name
• 0926. Flip String to Monotone Increasing
• 0928. Minimize Malware Spread II
• 0929. Unique Email Addresses
• 0931. Minimum Falling Path Sum
• 0933. Number of Recent Calls
• 0935. Knight Dialer
• 0938. Range Sum of BST
• 0940. Distinct Subsequences II
• 0941. Valid Mountain Array
• 0942. DI String Match
• 0948. Bag of Tokens
• 0949. Largest Time for Given Digits
• 0951. Flip Equivalent Binary Trees
• 0976. Largest Perimeter Triangle
• 0997. Find the Town Judge
• 0998. Maximum Binary Tree II
• 1005. Maximize Sum Of Array After K Negations
• 1006. Clumsy Factorial
• 1007. Minimum Domino Rotations For Equal Row
• 1014. Best Sightseeing Pair
• 1015. Smallest Integer Divisible by K
• 1016. Binary String With Substrings Representing 1 To N
• 1020. Partition Array Into Three Parts With Equal Sum
• 1021. Best Sightseeing Pair
• 1022. Sum of Root To Leaf Binary Numbers
• 1023. Camelcase Matching
• 1024. Video Stitching
• 1029. Binary Prefix Divisible By 5
• 1030. Next Greater Node In Linked List