事情是这样的. 下面这个就是我在GitHub上面自动生成的LintCode表格. 当时先做的是LintCode， 大约有150来道。

现在转手来做LeetCode，作为复习和巩固，每一篇都会详细把要点摘录一下。而过去做过的这些LintCode, 就不一片片更新拉，一口气放在这篇文章里面。

更新到300多时，已经进入另一个阶段啦。我之前还有做过另外一个专题，叫做ReviewPage, 复习页面，大体上是把做过的题目用中文总结了一遍，方便未来在复习时候可以浏览。在简书这里也贴上一贴吧：ReviewPage复习总结页。

所有内容都来自我的GitHub:
https://github.com/awangdev/LintCode

Java Algorithm Problems

程序员的一天

从开始这个Github已经有将近两年时间, 很高兴这个repo可以帮到有需要的人. 我一直认为, 知识本身是无价的, 因此每逢闲暇, 我就会来维护这个repo, 给刷题的朋友们一些我的想法和见解. 下面来简单介绍一下这个repo:

README.md: 所有所做过的题目

ReviewPage.md: 所有题目的总结和归纳（不断完善中）

KnowledgeHash2.md: 对所做过的知识点的一些笔记

SystemDesign.md: 对系统设计的一些笔记

Future Milestone: 我准备将一些有意思的题目，做成视频的形式给大家参考

借此机会, 正式介绍一下自己, 以及我背后的大老板

介绍一下自己！

希望大家学习顺利, 对未来充满希望(程序员也是找到好老板的!)
有问题可以给我写邮件(wangdeve@gmail.com), 或者在GitHub上发issue给我, 或者关注我的YouTubeChannel

Squence	Problem	Level	Language	Video Tutorial
0	A+B.java	Easy	Java
1	Add and Search Word.java	Medium	Java
2	Add Binary.java	Easy	Java
3	Add Digits.java	Easy	Java
4	Add Two Numbers II.java	Medium	Java
5	Add Two Numbers.java	Easy	Java
6	Alien Dictionary.java	Hard	Java
7	Anagrams.java	Medium	Java
8	Backpack II.java	Medium	Java
9	Backpack.java	Medium	Java
10	Balanced Binary Tree.java	Medium	Java
11	Binary Representation.java	Hard	Java
12	Binary Search Tree Iterator.java	Hard	Java
13	Binary Tree Inorder Traversal.java	Easy	Java
14	Binary Tree Level Order Traversal II.java	Medium	Java
15	Binary Tree Level Order Traversal.java	Medium	Java
16	Binary Tree Longest Consecutive Sequence.java	Medium	Java
17	Binary Tree Maximum Path Sum II.java	Medium	Java
18	Binary Tree Maximum Path Sum.java	Medium	Java
19	Binary Tree Path Sum.java	Easy	Java
20	Binary Tree Paths.java	Easy	Java
21	Binary Tree Postorder Traversal.java	Easy	Java
22	Binary Tree Preorder Traversal.java	Easy	Java
23	Binary Tree Right Side View.java	Medium	Java
24	Binary Tree Serialization.java	Medium	Java
25	Binary Tree Zigzag Level Order Traversal.java	Medium	Java
26	Building Outline.java	Hard	Java
27	Burst Balloons.java	Hard	Java
28	Change to Anagram.java	Easy	Java
29	Classical Binary Search.java	Easy	Java
30	Climbing Stairs.java	Easy	Java
31	Clone Graph.java	Medium	Java
32	Closest Binary Search Tree Value.java	Easy	Java
33	Closest Number in Sorted Array.java	Easy	Java
34	Coins in a Line.java	N/A	Java
35	ColorGrid.java	Medium	Java
36	Combination Sum II.java	Medium	Java
37	Combination Sum.java	Medium	Java
38	Combinations.java	Medium	Java
39	Compare Strings.java	Easy	Java
40	Complete Binary Tree.java	Easy	Java
41	Construct Binary Tree from Inorder and Postorder Traversal.java	Medium	Java
42	Construct Binary Tree from Inorder and Preorder Traversal.java	Medium	Java
43	Container With Most Water.java	Medium	Java
44	Contains Duplicate II.java	Easy	Java
45	Contains Duplicate III.java	Medium	Java
46	Contains Duplicate.java	Easy	Java
47	Convert Binary Search Tree to Doubly Linked List.java	Medium	Java
48	Convert Expression to Polish Notation.java	Hard	Java
49	Convert Expression to Reverse Polish Notation.java	Hard	Java
50	Convert Integer A to Integer B.java	Easy	Java
51	Convert Sorted Array to Binary Search Tree With Minimal Height.java	Easy	Java
52	Convert Sorted List to Binary Search Tree.java	Medium	Java
53	Copy List with Random Pointer.java	Medium	Java
54	Cosine Similarity.java	Easy	Java
55	Count 1 in Binary.java	Easy	Java
56	Count and Say.java	Easy	Java
57	Count of Smaller Number before itself.java	Hard	Java
58	Count of Smaller Number.java	Medium	Java
59	Count Primes.java	Easy	Java
60	Course Schedule II.java	Medium	Java
61	Course Schedule.java	Medium	Java
62	Data Stream Median.java	Hard	Java
63	Delete Digits.java	Medium	Java
64	Delete Node in the Middle of Singly Linked List.java	Easy	Java
65	Distinct Subsequences.java	Hard	Java
66	Edit Distance.java	Medium	Java
67	Encode and Decode Strings.java	Medium	Java
68	ExcelSheetColumnNumber .java	Easy	Java
69	Expression Evaluation.java	Hard	Java
70	Expression Tree Build.java	Hard	Java
71	Fast Power.java	Medium	Java
72	Fibonacci.java	Easy	Java
73	Find Minimum in Rotated Sorted Array II.java	N/A	Java
74	Find Minimum in Rotated Sorted Array.java	N/A	Java
75	Find Peak Element II.java	N/A	Java
76	Find Peak Element.java	Medium	Java
77	Find the Connected Component in the Undirected Graph.java	Medium	Java
78	Find the Weak Connected Component in the Directed Graph.java	Medium	Java
79	First Bad Version.java	Medium	Java
80	First Missing Positive.java	N/A	Java
81	Flatten 2D Vector.java	Medium	Java
82	Flatten Binary Tree to Linked List.java	Easy	Java
83	Flip Game II.java	Medium	Java
84	Flip Game.java	Easy	Java
85	Fraction to Recurring Decimal.java	Medium	Java
86	Game of Life.java	N/A	Java
87	Gas Station.java	N/A	Java
88	Generate Parentheses.java	Medium	Java
89	Graph Valid Tree.java	Medium	Java
90	Gray Code.java	Medium	Java
91	Group Anagrams.java	Medium	Java
92	Group Shifted Strings.java	Easy	Java
93	H-Index II.java	Medium	Java
94	H-Index.java	Medium	Java
95	Hamming Distance.java	Easy	Java
96	Happy Number.java	Easy	Java
97	Hash Function.java	Easy	Java
98	HashHeap.java	Hard	Java
99	HashWithArray.java	Easy	Java
100	HashWithCustomizedClass(LinkedList).java	Medium	Java
101	Heapify.java	Medium	Java
102	Heaters.java	Easy	Java
103	House Robber III.java	Hard	Java
104	Identical Binary Tree.java	Easy	Java
105	Implement Queue by Two Stacks.java	N/A	Java
106	Implement Queue using Stacks.java	Easy	Java
107	Implement Stack by Two Queues.java	Easy	Java
108	Implement Stack using Queues.java	Easy	Java
109	Implement Stack.java	Easy	Java
110	Implement strStr().java	N/A	Java
111	Implement Trie (Prefix Tree).java	Medium	Java
112	Implement Trie.java	Medium	Java
113	IndexMatch.java	Easy	Java
114	Inorder Successor in Binary Search Tree.java	Medium	Java
115	Insert Interval.java	Easy	Java
116	Insert Node in a Binary Search Tree .java	Easy	Java
117	Insertion Sort List.java	N/A	Java
118	Integer to English Words.java	N/A	Java
119	Interleaving Positive and Negative Numbers.java	N/A	Java
120	Interleaving String.java	N/A	Java
121	Intersection of Two Arrays.java	Easy	Java
122	Intersection of Two Linked Lists.java	Easy	Java
123	Interval Minimum Number.java	Medium	Java
124	Interval Sum II.java	Hard	Java
125	Interval Sum.java	Medium	Java
126	Invert Binary Tree.java	Easy	Java
127	Isomorphic Strings.java	Easy	Java
128	Jump Game II.java	Hard	Java
129	Kth Largest Element.java	Medium	Java
130	Kth Smallest Element in a BST.java	N/A	Java
131	Kth Smallest Number in Sorted Matrix.java	Medium	Java
132	Kth Smallest Sum In Two Sorted Arrays.java	Hard	Java
133	Largest Number.java	N/A	Java
134	Largest Rectangle in Histogram.java	N/A	Java
135	Last Position of Target.java	N/A	Java
136	Length of Last Word.java	N/A	Java
137	Letter Combinations of a Phone Number.java	Medium	Java
138	Linked List Cycle II.java	N/A	Java
139	Linked List Cycle.java	N/A	Java
140	Longest Common Prefix.java	Medium	Java
141	Longest Common Subsequence.java	N/A	Java
142	Longest Common Substring.java	N/A	Java
143	Longest Consecutive Sequence.java	N/A	Java
144	Longest Increasing Continuous subsequence II.java	N/A	Java
145	Longest Increasing Continuous subsequence.java	Easy	Java
146	Longest Palindromic Substring.java	Medium	Java
147	Longest Substring with At Most K Distinct Characters.java	Medium	Java
148	Longest Substring Without Repeating Characters.java	Medium	Java
149	Longest Univalue Path.java	Easy	Java
150	Longest Word in Dictionary.java	Easy	Java
151	Longest Words.java	N/A	Java
152	Lowest Common Ancestor II.java	Easy	Java
153	Lowest Common Ancestor of a Binary Search Tree.java	Medium	Java
154	Lowest Common Ancestor.java	Easy	Java
155	LRU Cache.java	Hard	Java
156	Majority Number II.java	Medium	Java
157	Majority Number III.java	Medium	Java
158	Majority Number.java	Easy	Java
159	Matrix Zigzag Traversal.java	Easy	Java
160	Max Area of Island.java	Easy	Java
161	Max Tree.java	Hard	Java
162	Maximal Square.java	Medium	Java
163	Maximum Average Subarray II.java	Review	Java
164	Maximum Depth of Binary Tree.java	Easy	Java
165	Maximum Subarray III.java	N/A	Java
166	Maximum Subarray.java	Easy	Java
167	Maximum SubarrayII.java	N/A	Java
168	MaximumSubarrayII.java	N/A	Java
169	Median of two Sorted Arrays.java	Hard	Java
170	Median.java	N/A	Java
171	Meeting Rooms II.java	Medium	Java
172	Meeting Rooms.java	Easy	Java
173	Merge Intervals.java	Easy	Java
174	Merge k Sorted Arrays.java	Medium	Java
175	Merge k Sorted Lists.java	Medium	Java
176	Merge Sorted Array II.java	N/A	Java
177	Merge Sorted Array.java	Easy	Java
178	Merge Two Binary Trees.java	Easy	Java
179	Merge Two Sorted Lists.java	Easy	Java
180	Middle of Linked List.java	N/A	Java
181	Min Stack.java	Easy	Java
182	Minimum Absolute Difference in BST.java	Easy	Java
183	Minimum Height Trees.java	N/A	Java
184	Minimum Path Sum.java	N/A	Java
185	Minimum Size Subarray Sum.java	Medium	Java
186	Minimum Subarray.java	N/A	Java
187	Minimum Window Substring.java	Hard	Java
188	MinimumDepthOfBinaryTree.java	Easy	Java
189	Missing Ranges.java	N/A	Java
190	Multiply Strings.java	Medium	Java
191	Next Permutation.java	Medium	Java
192	Nim Game.java	Easy	Java
193	NQueens.java	N/A	Java
194	NQueensII.java	N/A	Java
195	Nth to Last Node in List.java	N/A	Java
196	Number of Airplane in the sky.java	Medium	Java
197	Number of Islands II.java	Hard	Java
198	Number of Islands.java	Medium	Java
199	Number Triangles.java	N/A	Java
200	O(1) Check Power of 2.java	N/A	Java
201	One Edit Distance.java	Medium	Java
202	Paint Fence.java	N/A	Java
203	Palindrome Linked List.java	N/A	Java
204	Palindrome Partitioning II.java	N/A	Java
205	Palindrome Partitioning.java	N/A	Java
206	Palindrome Permutation II.java	Medium	Java
207	Palindrome Permutation.java	Easy	Java
208	Partition Array by Odd and Even.java	N/A	Java
209	Partition Array.java	N/A	Java
210	Partition List.java	N/A	Java
211	Pascal's Triangle II.java	Easy	Java
212	Peeking Iterator.java	N/A	Java
213	Perfect Squares.java	N/A	Java
214	Permutation Index.java	Easy	Java
215	Permutation Sequence.java	Medium	Java
216	Permutations II.java	Medium	Java
217	Permutations.java	Medium	Java
218	Populating Next Right Pointers in Each Node II.java	Hard	Java
219	Populating Next Right Pointers in Each Node.java	Medium	Java
220	Pow(x,n).java	N/A	Java
221	Product of Array Exclude Itself.java	N/A	Java
222	QuickSort.java	Easy	Java
223	Recover Rotated Sorted Array.java	N/A	Java
224	Rehashing.java	Medium	Java
225	Remove Duplicates from Sorted Array.java	Easy	Java
226	Remove Duplicates from Sorted List II.java	N/A	Java
227	Remove Duplicates from Sorted List.java	Easy	Java
228	Remove Duplicates from Unsorted List.java	N/A	Java
229	Remove Linked List Elements.java	N/A	Java
230	Remove Node in Binary Search Tree.java	Hard	Java
231	Remove Nth Node From End of List.java	N/A	Java
232	Reorder List.java	N/A	Java
233	Reshape the Matrix.java	Easy	Java
234	Restore IP Addresses.java	N/A	Java
235	Reverse Integer.java	Easy	Java
236	Reverse Linked List II .java	N/A	Java
237	Reverse Linked List.java	Easy	Java
238	Reverse String.java	Easy	Java
239	Reverse Words in a String II.java	Medium	Java
240	Reverse Words in a String.java	Medium	Java
241	reverseInteger.java	Easy	Java
242	Roman to Integer.java	Easy	Java
243	Rotate Image.java	Medium	Java
244	Rotate List.java	N/A	Java
245	Rotate String.java	N/A	Java
246	Russian Doll Envelopes.java	N/A	Java
247	Search a 2D Matrix II.java	N/A	Java
248	Search a 2D Matrix.java	N/A	Java
249	Search for a Range.java	N/A	Java
250	Search Insert Position.java	N/A	Java
251	Search Range in Binary Search Tree .java	Medium	Java
252	Search Rotated in Sorted Array II.java	N/A	Java
253	Search Rotated in Sorted Array.java	Hard	Java
254	Segment Tree Build II.java	Medium	Java
255	Segment Tree Build.java	Medium	Java
256	Segment Tree Modify.java	Medium	Java
257	Segment Tree Query II.java	Medium	Java
258	Segment Tree Query.java	Medium	Java
259	Serilization and Deserialization Of Binary Tree.java	N/A	Java
260	Shortest Word Distance.java	Easy	Java
261	Single Number II.java	N/A	Java
262	Single Number III.java	N/A	Java
263	Single Number.java	Easy	Java
264	Singleton.java	N/A	Java
265	Sliding Window Maximum.java	N/A	Java
266	Sliding Window Median.java	N/A	Java
267	Sort Color.java	N/A	Java
268	Sort Colors II.java	N/A	Java
269	Sort Letters by Case.java	N/A	Java
270	Sort List.java	N/A	Java
271	Space Replacement.java	N/A	Java
272	Sqrt(x).java	Easy	Java
273	Stone Game.java	N/A	Java
274	String Permutation.java	Easy	Java
275	String to Integer(atoi).java	Easy	Java
276	Strobogrammatic Number II.java	Medium	Java
277	Strobogrammatic Number.java	Easy	Java
278	StrStr.java	N/A	Java
279	Subarray Sum Closest.java	Medium	Java
280	Subarray Sum.java	Easy	Java
281	Subset.java	Medium	Java
282	Subsets II.java	Medium	Java
283	Subtree.java	Easy	Java
284	Summary Ranges.java	N/A	Java
285	Surrounded Regions.java	N/A	Java
286	Swap Nodes in Pairs.java	N/A	Java
287	Symmetric Binary Tree.java	Easy	Java
288	The Smallest Difference.java	N/A	Java
289	Top K Frequent Elements.java	Medium	Java
290	Top K Frequent Words.java	Medium	Java
291	Topological Sorting.java	Medium	Java
292	Total Occurrence of Target.java	N/A	Java
293	Trailing Zeros.java	N/A	Java
294	Trapping Rain Water II.java	Hard	Java
295	Tweaked Identical Binary Tree.java	Easy	Java
296	Two Lists Sum.java	N/A	Java
297	Two Strings Are Anagrams.java	Easy	Java
298	Ugly Number II.java	N/A	Java
299	Ugly Number.java	Medium	Java
300	Unique Binary Search Tree II.java	N/A	Java
301	Unique Characters.java	N/A	Java
302	Unique Word Abbreviation.java	N/A	Java
303	Update Bits.java	N/A	Java
304	Valid Anagram.java	Easy	Java
305	Valid Palindrome.java	Easy	Java
306	Valid Parentheses.java	Easy	Java
307	Valid Sudoku.java	Easy	Java
308	Validate Binary Search Tree.java	Medium	Java
309	Wood Cut.java	N/A	Java
310	Word Break II.java	Hard	Java
311	Word Break.java	Medium	Java
312	Word Ladder II.java	Hard	Java
313	Word Ladder.java	Medium	Java
314	Word Pattern.java	Easy	Java
315	Word Search II.java	Hard	Java
316	Word Search.java	Medium	Java
317	Zigzag Iterator.java	N/A	Java
318	Find Anagram Mappings.java	Easy	Java
319	Judge Route Circle.java	Easy	Java
320	Island Perimeter.java	Easy	Java
321	First Unique Character in a String.java	Easy	Java
322	Power of Three.java	Easy	Java
323	Plus One.java	Easy	Java
324	Power of Two.java	Easy	Java
325	Reverse Vowels of a String.java	Easy	Java
326	Guess Number Higher or Lower.java	Easy	Java
327	Encode and Decode TinyURL.java	Medium	Java
328	Wiggle Sort.java	Medium	Java
329	Queue Reconstruction by Height.java	Medium	Java
330	2 Sum.java	Easy	Java	Link
331	2 Sum II - Input array is sorted.java	Medium	Java
332	2 Sum II.java	Medium	Java
333	Coin Change.java	Medium	Java
334	Unique Path.java	Medium	Java
335	Jump Game.java	Medium	Java
336	Maximum Product Subarray.java	Medium	Java
337	3 Sum Closest.java	Medium	Java
338	Triangle Count.java	Medium	Java
339	3 Sum.java	Medium	Java
340	4 Sum.java	Medium	Java
341	k Sum.java	Hard	Java
342	Trapping Rain Water.java	Hard	Java
343	Longest Continuous Increasing Subsequence.java	Easy	Java
344	Longest Increasing Subsequence.java	Medium	Java
345	Unique Binary Search Tree.java	Medium	Java
346	Trim a Binary Search Tree.java	Easy	Java
347	Unique Paths II.java	Medium	Java
348	Counting Bits.java	Medium	Java
349	Bomb Enemy.java	Medium	Java
350	Paint House.java	Easy	Java
351	Decode Ways.java	Review	Java
352	House Robber.java	Easy	Java
353	House Robber II.java	Medium	Java
354	Best Time to Buy and Sell Stock I.java	Easy	Java
355	Best Time to Buy and Sell Stock II.java	Easy	Java
356	Best Time to Buy and Sell Stock III .java	Hard	Java
357	Best Time to Buy and Sell Stock IV.java	Hard	Java
358	Paint House II.java	Review	Java
359	3 Sum Smaller.java	Medium	Java
360	Array Partition I.java	Easy	Java
361	1-bit and 2-bit Characters.java	Easy	Java
362	Non-decreasing Array.java	Easy	Java
363	Max Consecutive Ones.java	Easy	Java
364	Find All Numbers Disappeared in an Array.java	Easy	Java
365	Maximum Average Subarray I.java	Easy	Java
366	Largest Number At Least Twice of Others.java	Easy	Java
367	Toeplitz Matrix.java	Easy	Java