Important Notes: I would not write coding in Visual Studio, so you can visit solutions by two methonds. One is by my Blog Column, and another direct way is by questions index.

About it

Algorithm is tool for exercising our thinking patterns, and we can strengthen the ability to convert mathematical models into code. Whether you are engaged in artificial intelligence, in-depth learning, or advanced software development, no matter what language you use, such as C#,C++,Java,python,etc., and applying the most appropriate algorithm is always the most important point when faced with a specific problem. Every problem in practice has its own particularity, which makes it not that easier to choose the most appropriate algorithm. How do we write the algorithm that most efficiently apply to a practical issue? Yes, LeetCode. You can write an algorithm until it accepted, and do not rush to do the next question, and learn the solution someone else has submitted, so you can solve the problem from the ability of solving the problem to that fast and efficient realm.

I create this respository called leetcode-csharp because I apply C# language to solve LeetCode and every day will update it and also publish it in CSDN blog(http://blog.csdn.net/daigualu) my blog column(http://blog.csdn.net/column/details/14761.html) Also, I will put some algorithm ideas that famous scientists have created on My Wiki for this repository such as Flody tortoise and hare and KMP and so on.

Anyway, welcome to view, star and fork, then contribute.

Today Update

Leetcode Today Update

Solution List

solutions using C# for leetcode according to tags of questions

• Solution Array Details
• Solution BinarySearch Details
• Solution DynamicProgramming Details
• Solution HashTable Details
• Solution LinkedList Details
• Solution Math Details
• Solution Stack Details
• Solution String Details
• Solution Tree Details
• Solution TwoPointers Details
• Solution BitManipulation
• Solution Sort

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-leetcode-csharp
3. Commit your changes: git commit -am 'Add some questions and better solutions'
4. Push to the branch: git push origin my-leetcode-csharp
5. Submit a pull request and enjoy! :D

Array Tag:

ID	Blog address
35	Search Insert Position
118	Pascal's Triangle
119	Pascal's Triangle II
414	Third Maximum Number
121	Best Time to Buy and Sell Stock
66	Plus One
26	Remove Duplicates from Sorted Array
27	Remove Element
122	Best Time to Buy and Sell Stock II
268	Missing Number
217	Contains Duplicate
532	K-diff Pairs in an Array
189	Rotate Array
169	Majority Element
167	Two Sum II - Input array is sorted
88	Merge Sorted Array
53	Maximum Subarray
485	Max Consecutive Ones
283	Move Zeroes
448	Find All Numbers Disappeared in an Array
1	Two Sum
219	Contains Duplicate II
566	Reshape the Matrix
561	Array Partition I

Binary Search:

ID	Blog address	PassRate	Level
367	Valid Perfect Square	37.8%	Easy
270	Closest Binary Search Tree Value	38.8%	Easy
167	Two Sum II - Input array is sorted	47.4%	Easy
441	Arranging Coins	36.0%	Easy
35	Search Insert Position	39.3%	Easy
374	Guess Number Higher or Lower	34.4%	Easy
69	Sqrt(x)	27.4%	Easy
278	First Bad Version	24.8%	Easy
475	Heaters	29.7%	Easy
350	Intersection of Two Arrays II	44.1%	Easy
349	Intersection of Two Arrays	46.5%	Easy

Dynamic Programming

ID	Blog address	PassRate	Level
53	Maximum Subarray	39.2%	Easy
169	Majority Element	45.6%	Easy
303	Range Sum Query - Immutable	27.8%	Easy
276	Paint Fence	34.1%	Easy
523	Continuous Subarray Sum	21.6%	Easy
256	Paint House	45.9%	Easy
198	House Robber	38.1%	Easy
121	Best Time to Buy and Sell Stock	40.1%	Easy
70	Climbing Stairs	39.2%	Easy

HashTable:

ID	Blog address
136	Single number
1	Two Sum
447	Number of Boomerangs
463	Island Perimeter
409	Longest Palindrome
438	Find All Anagrams in a String
389	Find the Difference
350	Intersection of Two Arrays II
349	Intersection of Two Arrays
500	Keyboard Row
217	Contains Duplicate
204	Count Primes
202	Happy Number
219	Contains Duplicate II
242	Valid Anagram
290	Word Pattern
205	Isomorphic Strings

Linked List

ID	Blog address
141	Linked List Cycle
237	Delete Node in a Linked List
83	Remove Duplicates from Sorted List
160	Intersection of Two Linked Lists
203	Remove Linked List Elements
206	Reverse Linked List
234	Palindrome Linked List
21	Merge Two Sorted Lists

Math:

ID	Blog address
231	Power of Two
268	Missing Number
507	Perfect Number
9	Palindrome Number
453	Minimum Moves to Equal Array Elements
13	Roman to Integer
441	Arranging Coins
415	Add Strings
400	Nth Digit
367	Valid Perfect Square
66	Plus One
7	Reverse Integer
204	Count Primes
202	Happy Number
172	Factorial Trailing Zeroes
171	Excel Sheet Column Number
168	Excel Sheet Column Title
258	Add Digits
263	Ugly Number
69	Sqrt(x)
67	Add Binary
246	Strobogrammatic Number
326	Power of Three

Stack:

ID	Blog address	PassRate	Level
225	Implement Stack using Queues	32.0%	Easy
496	Next Greater Element I	57.5%	Easy
155	Min Stack	27.4%	Easy
232	Implement Queue using Stacks	35.8%	Easy
20	Valid Parentheses	32.9%	Easy

String:

ID	Blog address	PassRate	Level
58	Length of Last Word	31.5%	Easy
20	Valid Parentheses	32.8%	Easy
520	Detect Capital	52.5%	Easy
459	Repeated Substring Pattern	38.4%	Easy
434	Number of Segments in a String	37.0%	Easy
408	Valid Word Abbreviation	27.5%	Easy
13	Roman to Integer	44.6%	Easy
14	Longest Common Prefix	31.0%	Easy
383	Ransom Note	46.5%	Easy
521	Longest Uncommon Subsequence I	46.1%	Easy
345	Reverse Vowels of a String	37.9%	Easy
28	Implement strStr()	27.5%	Easy
344	Reverse String	58.2%	Easy
293	Flip Game	54.8%	Easy
38	Count and Say	33.4%	Easy
157	Read N Characters Given Read4	29.2%	Easy
541	Reverse String II	44.1%	Easy
125	Valid Palindrome	25.8%	Easy
67	Add Binary	31.3%	Easy

Tree:

ID	Blog address	PassRate	Level
107	Binary Tree Level Order Traversal II	39.0%	Easy
257	Binary Tree Paths	36.8%	Easy
501	Find Mode in Binary Search Tree	38.4%	Easy
437	Path Sum III	39.3%	Easy
404	Sum of Left Leaves	46.5%	Easy
112	Path Sum	33.5%	Easy
110	Balanced Binary Tree	36.8%	Easy
108	Convert Sorted Array to Binary Search Tree	41.3%	Easy
543	Diameter of Binary Tree	42.3%	Easy
226	Invert Binary Tree	50.8%	Easy
235	Lowest Common Ancestor of a Binary Search Tree	38.5%	Easy
104	Maximum Depth of Binary Tree	51.7%	Easy
111	Minimum Depth of Binary Tree	32.7%	Easy
101	Symmetric Tree	37.9%	Easy
100	Same Tree	45.8%	Easy

Two Pointers:

ID	Blog address
345	Reverse Vowels of a String
125	Valid Palindrome
283	Move Zeroes
88	Merge Sorted Array
234	Palindrome Linked List
349	Intersection of Two Arrays
167	Two Sum II - Input array is sorted
350	Intersection of Two Arrays II
344	Reverse String
28	Implement strStr()
27	Remove Element
26	Remove Duplicates from Sorted Array
141	Linked List Cycle
532	K-diff Pairs in an Array