LeetCode
对做过的题目进行粗略的划分。紫色是top100。
树：
LeetCode94：Binary Tree Inorder Traversal
LeetCode144：Binary Tree Preorder Traversal
LeetCode145：Binary Tree Postorder Traversal
LeetCode96：Unique Binary Search Trees
LeetCode98：Validate Binary Search Tree
LeetCode100：Same Tree
LeetCode101：Symmetric Tree
LeetCode102：Binary Tree Level Order Traversal
LeetCode104：Maximum Depth of Binary Tree
LeetCode105：Construct Binary Tree from Preorder and Inorder Traversal
LeetCode107：Binary Tree Level Order Traversal II
LeetCode108：Convert Sorted Array to Binary Search Tree
LeetCode109：Convert Sorted List to Binary Search Tree
LeetCode110：Balanced Binary Tree
LeetCode111：Minimum Depth of Binary Tree
LeetCode112：Path Sum
LeetCode114：Flatten Binary Tree to Linked List
LeetCode124：Binary Tree Maximum Path Sum
LeetCode199：Binary Tree Right Side View
LeetCode208：Implement Trie (Prefix Tree)
LeetCode226：Invert Binary Tree
LeetCode235：Lowest Common Ancestor of a Binary Search Tree
LeetCode236：Lowest Common Ancestor of a Binary Tree
LeetCode257：Binary Tree Paths
LeetCode297：Serialize and Deserialize Binary Tree
LeetCode437：Path Sum III
LeetCode538：Convert BST to Greater Tree
LeetCode543：Diameter of Binary Tree
LeetCode572：Subtree of Another Tree
LeetCode617：Merge Two Binary Trees
DFS:
LeetCode200：Number of Islands
LeetCode301：Remove Invalid Parentheses
图：
LeetCode207：Course Schedule
回溯：
LeetCode17：Letter Combinations of a Phone Number
LeetCode22：Generate Parentheses
LeetCode39：Combination Sum(回溯)
LeetCode40：Combination Sum II(回溯)
LeetCode46：Permutations
LeetCode78：Subsets(回溯)
LeetCode79：Word Search
LeetCode216：Combination Sum III(回溯)
动态规划：
LeetCode5：Longest Palindromic Substring
LeetCode10：Regular Expression Matching
LeetCode32：Longest Valid Parentheses
LeetCode53：Maximum Subarray
LeetCode62： Unique Paths
LeetCode63： Unique Paths II
LeetCode64：Minimum Path Sum
LeetCode70：Climbing Stairs
LeetCode72：Edit Distance
LintCode77：Longest Common Subsequence
LintCode79：Longest Common Substring
LeetCode96：Unique Binary Search Trees
LeetCode121：Best Time to Buy and Sell Stock
LeetCode139：Word Break
LeetCode152：Maximum Product Subarray
LeetCode198：House Robber
LeetCode221：Maximal Square
LeetCode264：Ugly Number II
LeetCode279：Perfect Squares
LeetCode300：Longest Increasing Subsequence
LeetCode309：Best Time to Buy and Sell Stock with Cooldown
LeetCode312：Burst Balloons
LeetCode322：Coin Change
LeetCode337：House Robber III
LeetCode338：Counting Bits
LeetCode416：Partition Equal Subset Sum
LeetCode494：Target Sum
LeetCode581：Shortest Unsorted Continuous Subarray
LeetCode647：Palindromic Substrings
双指针：
LeetCode3：Longest Substring Without Repeating Characters
LeetCode42：Trapping Rain Water
LeetCode76：Minimum Window Substring
栈：
LeetCode20：Valid Parentheses
LeetCode32：Longest Valid Parentheses
LeetCode84：Largest Rectangle in Histogram
LeetCode85：Maximal Rectangle
LeetCode155：Min Stack
LeetCode225：Implement Stack using Queues
LeetCode232：Implement Queue using Stacks
LeetCode394：Decode String
LeetCode921：Minimum Add to Make Parentheses Valid
位运算：
LeetCode29：Divide Two Integers
LeetCode136：Single Number
LeetCode137：Single Number II
LeetCode260：Single Number III
LeetCode461：Hamming Distance
二分法：
LeetCode33：Search in Rotated Sorted Array(二分法)
LeetCode34：Find First and Last Position of Element in Sorted Array(二分法)
LeetCode35：Search Insert Position(二分法)
LeetCode69：Sqrt(x)(二分法)
LeetCode74：Search a 2D Matrix
LeetCode81：Search in Rotated Sorted Array II
LeetCode153：Find Minimum in Rotated Sorted Array
LeetCode154：Find Minimum in Rotated Sorted Array II
LeetCode240：Search a 2D Matrix II
LeetCode278：First Bad Version(二分法)
LeetCode287：Find the Duplicate Number
LeetCode300：Longest Increasing Subsequence
math：
LeetCode7：Reverse Integer
LeetCode9：Palindrome Number
LeetCode263：Ugly Number
堆：
LeetCode347：Top K Frequent Elements
hash table:
LeetCode01：two Sum
LeetCode3：Longest Substring Without Repeating Characters
LeetCode49：Group Anagrams
LeetCode76：Minimum Window Substring
LeetCode128：Longest Consecutive Sequence
LeetCode146：LRU Cache
LeetCode159：Longest Substring with At Most Two Distinct Characters
LeetCode202：Happy Number
LeetCode205：Isomorphic Strings
LeetCode242：Valid Anagram
LeetCode340：Longest Substring with At Most K Distinct Characters
LeetCode438：Find All Anagrams in a String
LeetCode560：Subarray Sum Equals K
LeetCode771：Jewels and Stones
贪心算法：
LeetCode55：Jump Game
LeetCode45：Jump Game II
LeetCode122：Best Time to Buy and Sell Stock II
LeetCode134：Gas Station
LeetCode135：Candy
LeetCode406：Queue Reconstruction by Height
LeetCode621：Task Scheduler
数组：
LeetCode4：Median of Two Sorted Arrays
LeetCode11：Container With Most Water
LeetCode15：3Sum
LeetCode16：3Sum Closest
LeetCode18：4Sum
LeetCode26：Remove Duplicates from Sorted Array
LeetCode27：Remove Element
LeetCode31：Next Permutation
LeetCode48：Rotate Image
LeetCode54：Spiral Matrix
LeetCode56：Merge Intervals
LeetCode59：Spiral Matrix II
LeetCode75：Sort Colors
LeetCode80：Remove Duplicates from Sorted Array II
LeetCode88：Merge Sorted Array
LeetCode167：Two Sum II - Input array is sorted
LeetCode169：Majority Element
LeetCode189：Rotate Array
LeetCode204：Count Primes
LeetCode215：Kth Largest Element in an Array
LeetCode217：Contains Duplicate
LeetCode219：Contains Duplicate II
LeetCode223：Rectangle Area
LeetCode229：Majority Element II
LeetCode238：Product of Array Except Self
LeetCode239：Sliding Window Maximum
LeetCode253：Meeting Rooms II
LeetCode268：Missing Number(多种方法)
LeetCode283：Move Zeroes
LeetCode287：Find the Duplicate Number
LeetCode349：Intersection of Two Arrays(多种方法)
LeetCode350：Intersection of Two Arrays II(优化)
LeetCode377：Combination Sum IV(动态规划)
LeetCode414. Third Maximum Number
LeetCode442：Find All Duplicates in an Array
LeetCode448：Find All Numbers Disappeared in an Array
LeetCode581：Shortest Unsorted Continuous Subarray
LeetCode611：Valid Triangle Number
LeetCode836：Rectangle Overlap
字符串：
LeetCode13：Roman to Integer
LeetCode14：Longest Common Prefix
LeetCode28：Implement strStr()
LeetCode38：Count and Say
LeetCode58：Length of Last Word
LeetCode67：Add Binary
LeetCode125：Valid Palindrome
LeetCode344：Reverse String
链表：
LeetCode2：Add Two Numbers
LeetCode19: Remove Nth Node From End of List
LeetCode21: Merge Two Sorted Lists
LeetCode23：Merge k Sorted Lists
LeetCode82：Remove Duplicates from Sorted List II
LeetCode83：Remove Duplicates from Sorted List
LeetCode141：Linked List Cycle
LeetCode142：Linked List Cycle II
LeetCode146：LRU Cache
LeetCode148：Sort List
LeetCode160：Intersection of Two Linked Lists
LeetCode203：Remove Linked List Elements
LeetCode206：Reverse Linked List
LeetCode234：Palindrome Linked List
LeetCode237：Delete Node in a Linked List
LeetCode876：Middle of the Linked List