SUMMARY.md

• Leetcode Python 题解
• 001 two sum
• 002 add two numbers
• 003 longest substring without repeating characters
• 004 median of two sorted arrays
• 005 longest palindromic substring
• 006 ZigZag Conversion
• 007 Reverse Integer
• 008 string to integer (atoi)
• 009 Palindrome Number
• 010 regular expression matching
• 011 container with most water
• 012 Integer to Roman
• 013 Roman to Integer
• 014 longest common prefix
• 015 3sum
• 016 3sum closest
• 017 letter combinations of a phone number
• 018 4sum
• 019 remove nth node from end of list
• 020 valid parentheses
• 021 merge two sorted lists
• 022 generate parentheses
• 023 merge k sorted lists
• 024 swap nodes in pairs
• 026 Remove Duplicates from Sorted Array
• 027 Remove Element
• 028 implement strstr()
• 030 Substring with Concatenation of All Words
• 031 next permutation
• 032 longest valid parentheses
• 033 search in rotated sorted array
• 034 Search for a Range
• 035 search insert position
• 038 Count and Say
• 039 combination sum
• 040 combination sum ii
• 041 First Missing Positive
• 042 trapping rain water
• 043 multiply strings
• 044 wildcard matching
• 045 Jump Game II
• 046 permutations
• 047 permutations ii
• 048 rotate image
• 049 group anagrams python
• 050 pow(x, n)
• 051 n-queens
• 052 n-queens ii
• 053 maximum subarray
• 054 spiral matrix
• 055 jump game
• 056 Merge Intervals
• 058 length of last word
• 059 spiral matrix ii
• 060 permutation sequence
• 061 rotate list
• 062 unique paths
• 064 minimum path sum
• 065 unique paths ii
• 066 plus one
• 067 add binary
• 069 sqrt(x)
• 070 Climbing Stairs
• 072 edit distance
• 073 Set Matrix Zeroes
• 074 search a 2d matrix
• 075 sort colors
• 076 Minimum Window Substring
• 077 combinations
• 078 Subsets
• 079 word search
• 082 remove duplicates from sorted list ii
• 083 remove duplicates from sorted list
• 086 partition list
• 088 merge sorted array
• 089 gray code
• 090 subsets ii
• 091 decode ways
• 092 reverse linked list ii
• 093 restore ip addresses
• 094 binary tree inorder traversal
• 096 unique binary search trees
• 098 validate binary search tree
• 100 same tree
• 101 symmetric tree
• 102 binary tree level order traversal
• 103 binary tree zigzag level order traversal
• 104 maximum depth of binary tree
• 105 construct binary tree from preorder and inorder traversal
• 106 construct binary tree from inorder and postorder traversal
• 107 binary tree level order traversal ii
• 108 convert sorted array to binary search tree
• 109 convert sorted list to binary search tree
• 110 balanced binary tree
• 111 minimum depth of binary tree
• 112 path sum
• 113 path sum ii
• 114 flatten binary tree to linked list
• 116 populating next right pointers in each node
• 117 Populating Next Right Pointers in Each Node II
• 118 pascal's triangle
• 119 Pascal's Triangle II
• 120 Triangle
• 121 Best Time to Buy and Sell Stock
• 124 Binary Tree Maximum Path Sum
• 125 valid palindrome
• 126 Word Ladder II
• 127 word ladder
• 128 Longest Consecutive Sequence
• 129 sum root to leaf numbers
• 130 surrounded regions
• 131 palindrome partitioning
• 133 clone graph
• 136 single number
• 139 word break
• 140 word break ii
• 141 linked list cycle
• 142_Linked_List_Cycle_II md
• 143 reorder list
• 144 binary tree preorder traversal
• 145 binary tree postorder traversal
• 147 insertion sort list
• 148 sort list
• 150 evaluate reverse polish notation
• 151 reverse words in a string
• 152 maximum product subarray
• 153 find minimum in rotated sorted array
• 155 min stack
• 157 Read N Characters Given Read4
• 158 Read N Characters Given Read4 II - Call multiple times
• 159 Longest Substring with At Most Two Distinct Characters
• 160 intersection of two linked lists
• 162 find peak element
• 165 compare version numbers
• 166 Fraction to Recurring Decimal
• 167 two sum ii - input array is sorted
• 168 excel sheet column title
• 169 majority element
• 171 excel sheet column number
• 173 binary search tree iterator
• 179 Largest Number
• 182 duplicate emails
• 189 rotate array
• 191 number of 1 bits
• 198 house robber
• 199 binary tree right side view
• 200 number of islands
• 203 remove linked list elements
• 204 count primes
• 205 isomorphic strings
• 206 reverse linked list
• 207 course schedule
• 208 implement trie (prefix tree)
• 210 course schedule ii
• 211 Add and Search Word - Data structure design
• 213 house robber ii
• 216 combination sum iii
• 217 contains duplicate
• 218 The Skyline Problem
• 219 contains duplicate ii
• 221 maximal square
• 222 count complete tree nodes
• 223 rectangle area
• 224 Basic Calculator
• 225 implement stack using queues
• 226 invert binary tree
• 227 basic calculator ii
• 228 summary ranges
• 229 majority element ii
• 230 kth smallest element in a bst
• 231 Power of Two
• 232 implement queue using stacks
• 234 palindrome linked list
• 235 lowest common ancestor of a binary search tree
• 236 lowest common ancestor of a binary tree
• 237 delete node in a linked list
• 238 product of array except self
• 240 search a 2d matrix ii
• 242 valid anagram
• 249 Group Shifted Strings
• 252 Meeting Rooms
• 255 Verify Preorder Sequence in Binary Search Tree
• 256 Paint House
• 257 binary tree paths
• 258_ Add_Digits md
• 261 Graph Valid Tree
• 263 ugly number
• 264 ugly number ii
• 265 Paint House II
• 266 Palindrome Permutation
• 267 Palindrome Permutation II
• 268 missing number
• 270 Closest Binary Search Tree Value
• 276 Paint Fence
• 277 Find the Celebrity
• 278 First Bad Version
• 279 perfect squares
• 280 Wiggle Sort
• 283 move zeroes
• 285 inorder successor in bst
• 286 Walls and Gates
• 287 Find the Duplicate Number
• 289 game of life
• 290 word pattern
• 292 nim game
• 293 Flip Game
• 296 Best Meeting Point
• 298 Binary Tree Longest Consecutive Sequence
• 299 bulls and cows
• 300 longest increasing subsequence
• 303 range sum query - immutable
• 316 Remove Duplicate Letters
• 319 Bulb Switcher
• 322 Coin Change
• 323 number of connected components in an undirected graph
• 324 Wiggle Sort II
• 326 power of three
• 328 odd even linked list
• 334 increasing triplet subsequence
• 337 house robber iii
• 338 Counting Bits
• 339 Nested List Weight Sum
• 341 Flatten Nested List Iterator
• 342 Power of Four
• 344 reverse string
• 345 Reverse Vowels of a String
• 349 intersection of two arrays
• 350 intersection of two arrays ii
• 353 Design Snake Game
• 361 Bomb Enemy
• 364 Nested List Weight Sum II
• 366 Find Leaves of Binary Tree
• 367 valid perfect square
• 369 Plus One Linked List
• 371 sum of two integers
• 374 Guess Number Higher or Lower
• 377 combination sum iv
• 378 kth smallest element in a sorted matrix
• 380 Insert Delete GetRandom O(1)
• 381 Insert Delete GetRandom O(1) - Duplicates allowed
• 382 linked list random node
• 383 ransom note
• 384 Shuffle an Array
• 386 Lexicographical Numbers
• 387 first unique character in a string
• 388 Longest Absolute File Path
• 389 find the difference
• 392 is subsequence
• 394 decode string
• 400 Nth Digit
• 401 binary watch
• 404 sum of left leaves
• 405 Convert a Number to Hexadecimal
• 406 Queue Reconstruction by Height
• 412 fizz buzz
• 413 Arithmetic Slices
• 414 third maximum number
• 415 add strings
• 416 Partition Equal Subset Sum
• 421 Maximum XOR of Two Numbers in an Array
• 422 Valid Word Square
• 434 number of segments in a string
• 435 Non-overlapping Intervals
• 437 path sum iii
• 438 Find All Anagrams in a String
• 439 Ternary Expression Parser
• 441 arranging coins
• 448 Find All Numbers Disappeared in an Array
• 450 Delete Node in a BST
• 453 Minimum Moves to Equal Array Elements
• 459 Repeated Substring Pattern
• 461 Hamming Distance
• 463 Island Perimeter
• 467 Unique Substrings in Wraparound String
• 469 Convex Polygon
• 476 Number Complement
• 477 Total Hamming Distance
• 485 Max Consecutive Ones
• 494 Target Sum
• 536 Construct Binary Tree from String
• 587 Erect the Fence
• 599 Minimum Index Sum of Two Lists
• 606 Construct String from Binary Tree
• 611 Valid Triangle Number
• 646 Maximum Length of Pair Chain
• 647 Palindromic Substrings
• 657 Judge Route Circle
• 665 Non-decreasing Array
• 672 Bulb Switcher II
• 681 Next Closest Time
• 682 Baseball Game
• 685 Redundant Connection II
• 687 Longest Univalue Path
• 693 Binary Number with Alternating Bits
• 701 Insert into a Binary Search Tree
• 707 Design Linked List
• 740 delete and earn
• 760 Find Anagram Mappings
• 774 Minimize Max Distance to Gas Station
• 777 Swap Adjacent in LR String
• 844 Backspace String Compare