LeetCode it!
Introduction
Tree
Path Sum
Balanced Binary Tree
Same Tree
Binary Tree Level Order Traversal
Binary Tree Level Order Traversal II
Invert Binary Tree
Symmetric Tree
Lowest Common Ancestor of a Binary Search Tree
Maximum Depth of Binary Tree
Minimum Depth of Binary Tree
Binary Tree Inorder Traversal
Binary Tree Preorder Traversal
Binary Tree Postorder Traversal
Array
Plus One
Rotate Array
Remove Element
Remove Duplicates from Sorted Array
Two Sum
Two Sum II - Input array is sorted
Pascal's Triangle
Pascal's Triangle II
Move Zeroes
Merge Sorted Array
Majority Element
Contains Duplicate
Contains Duplicate II
Reverse Words in a String II
Generate Parentheses
First Unique Character in a String
Reverse String
Intersection of Two Arrays
Intersection of Two Arrays II
Shuffle an Array
Top K Frequent Elements
Is Subsequence
Merge Intervals
Hash-Table
Word Pattern
Valid Anagram
Bulls and Cows
Isomorphic Strings
Happy Number
Single Number
Find the Difference
Stack
Implement Stack using Queues
Implement Queue using Stacks
Decode String
dynamic programming.
Best Time to Buy and Sell Stock
House Robber
Count Numbers with Unique Digits
Permutations
Linked List
Remove Duplicates from Sorted List
Merge Two Sorted Lists
Linked List Cycle
Swap Nodes in Pairs
Linked List Random Node
Delete Node in a Linked List
Reverse Linked List
Math
Factorial Trailing Zeroes
Excel Sheet Column Title
Excel Sheet Column Number
Nim Game
Add Digits
Power of Three
Power of Two
Different Ways to Add Parentheses
Binary Search
Guess Number Higher or Lower
Heap
Kth Smallest Element in a Sorted Matrix
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Introduction
楔子
先系着easy和medium的做
hard的就放放吧，反正也不会
不瞎耽误工夫了
没事多刷几次
没辙，忘性太大
;-)
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