LeetCode

自己刷LeetCode整理的一些题解笔记，有什么错误欢迎指出。

带♣为力扣2020.3.1开始的每日一题打卡

LeetCode 题解（持续更新中...）

#	Title	Solution	Difficulty
1	Two Sum	C++, Python	Easy
2♣	Add Two Numbers	C++, Python	Medium
3♣	Longest Substring Without Repeating Characters	C++, Python	Medium
4♣	Median of Two Sorted Arrays	C++, Python	Hard
5♣	Longest-Palindromic-Substring	C++, Python	Medium
6	Zigzag-Conversion	C++, Python	Medium
7	Reverse-Integer	C++, Python	Easy
8♣	String-To-Integer-Atoi	C++, Python	Medium
9	Palindrome-Number	C++, Python	Easy
10♣	Regular-Expression-Matching	C++, Python	Hard
11♣	Container-With-Most-Water	C++, Python	Medium
12	Integer-To-Roman	C++, Python	Medium
13	Roman-To-Integer	C++, Python	Easy
14♣	Longest-Common-Prefix	C++, Python	Easy
15♣	3Sum	C++, Python	Medium
16♣	3Sum-Closest	C++, Python	Medium
17	Letter-Combinations-Of-A-Phone-Number	C++, Python	Medium
18♣	4Sum	C++, Python	Medium
19	Remove-Nth-Node-From-End-Of-List	C++, Python	Medium
20♣ ♣	Valid-Parentheses	C++, Python	Easy
21♣	Merge-Two-Sorted-Lists	C++, Python	Easy
22♣	Generate-Parentheses	C++, Python	Medium
23♣	Merge-K-Sorted-Lists	C++, Python	Hard
24	Swap-Nodes-In-Pairs	C++, Python	Medium
25♣	Reverse-Nodes-In-K-Group	C++, Python	Hard
26	Remove-Duplicates-From-Sorted-Array	C++, Python	Easy
27	Remove-Element	C++, Python	Easy
28	Implement-Strstr	C++, Python	Easy
29	Divide-Two-Integers	C++, Python	Medium
30	Substring-With-Concatenation-Of-All-Words	C++, Python	Hard
31♣	Next-Permutation	C++, Python	Medium
32♣	Longest-Valid-Parentheses	C++, Python	Hard
33♣	Search-In-Rotated-Sorted-Array	C++, Python	Medium
34♣	Find-First-And-Last-Position-Of-Element-In-Sorted-Array	C++, Python	Medium
35	Search-Insert-Position	C++, Python	Easy
36	Valid-Sudoku	C++, Python	Medium
37	Sudoku-Solver	C++, Python	Hard
38	Count-And-Say	C++, Python	Easy
39♣	Combination-Sum	C++, Python	Medium
40♣	Combination-Sum-II	C++, Python	Medium
41♣	First-Missing-Positive	C++, Python	Hard
42♣	Trapping-Rain-Water	C++, Python	Hard
43♣	Multiply-Strings	C++, Python	Medium
44	Wildcard-Matching	C++, Python	Hard
45♣	Jump-Game-II	C++, Python	Hard
46♣	Permutations	C++, Python	Medium
47♣	Permutations-II	C++, Python	Medium
48	Rotate-Image	C++, Python	Medium
49	Group-Anagrams	C++, Python	Medium
50♣	PowX-N	C++, Python	Medium
51♣	N-Queens	C++	Haard
53♣	Maximum-Subarray	C++, Python	Easy
54	Spiral-Matrix	C++, Python	Medium
55♣	Jump-Game	C++, Python	Medium
56♣	Merge-Intervals	C++, Python	Medium
57	Insert-Intervals	C++, Python	Hard
58	Length-Of-Last-Word	C++, Python	Easy
59	Spiral-Matrix-II	C++, Python	Medium
60♣	Permutation-Sequence	C++, Python	Medium
61	Rotate-List	C++, Python	Medium
62♣	Unique-Paths	C++, Python	Medium
63	Unique-Paths-II	C++, Python	Medium
64	Minimum-Path-Sum	C++, Python	Medium
65	Valid-Number	C++, Python	Hard
66♣	Plus-One	C++	Easy
69♣	Sqrtx	C++	Easy
70♣	Climbing-Stairs	C++, Python	Easy
72♣	Edit-Distance	C++	Hard
74	Search-A-2D-Matrix	C++, Python	Medium
76♣	Minimum-Window-Substring	C++	Hard
77♣	Combinations	C++	Medium
78♣	Subsets	C++	Medium
79♣	Word-Search	C++, Python	Medium
81	Search-In-Rotated-Sorted-Array	C++	Medium
82	Remove-Duplicates-From-Sorted-List-II	C++, Python	Medium
83	Remove-Duplicates-From-Sorted-List	C++, Python	Easy
84♣	Largest-Rectangle-In-Histogram	C++, Python	Hard
85♣	Maximal-Rectangle	C++	Hard
88	Merge-Sorted-Array	C++,Python	Easy
90♣	Subsets-II	C++	Medium
93	Restore-Ip-Addresses	C++	Medium
94	Binary-Tree-Inorder-Traversal	C++, Python	Medium
98♣	Validate-Binary-Search-Tree	C++	Medium
100	Same-Tree	C++	Easy
101♣	Symmetric-Tree	C++, Python	Easy
102♣	Binary-Tree-Level-Order-Traversal	C++, Python	Medium
103	Binary-Tree-Zigzag-Level-Order-Traversal	C++, Python	Medium
104	Maximum-Depth-Of-Binary-Tree	C++, Python	Easy
105♣	Construct-Binary-Tree-From-Preorder-And-Inorder-Traversal	C++, Python	Medium
106♣	Construct-Binary-Tree-From-Ineorder-And-Postorder-Traversal	C++, Python	Medium
108♣	Convert-Sorted-Array-To-Binary-Search-Tree	C++	Easy
109♣	Convert-Sorted-List-To-Binary-Search-Tree	C++	Medium
110♣	Balanced-Binary-Tree	C++, Python	Easy
111♣	Minimum-Depth-Of-Binary-Tree	C++	Easy
112	Path-Sum	C++, Python	Easy
113	Path-Sum-II	C++, Python	Medium
114	Flatten-Binary-Tree-To-Linked-List	C++	Medium
118♣	Pascals-Triangle	C++	Easy
120	Triangle	C++, Python	Meidum
121♣	Best-Time-To-Buy-And-Sell-Stock	C++, Python	Easy
122♣	Best-Time-To-Buy-And-Sell-Stock-II	C++, Python	Easy
123♣	Best-Time-To-Buy-And-Sell-Stock-III	C++, Python	Hard
124♣	Binary-Tree-Maximum-Path-Sum	C++	Hard
125♣	Valid-Palindrome	C++	Easy
126♣	Word-Ladder-II	C++	Hard
128♣	Longest-Consecutive-Sequence	C++	Hard
130♣	Surrounded-Regions	C++	Medium
133♣	Clone-Graph	C++	Medium
136♣	Single-Number	C++, Python	Easy
139♣	Word-Break	C++	Medium
141♣	Linked-List-Cycle	C++, Python	Easy
142	Linked-List-Cycle-II	C++, Python	Medium
144	Binary-Tree-Preorder-Traversal	C++, Python	Medium
145	Binary-Tree-Postorder-Traversal	C++, Python	Medium
146♣	LRU-Cache	C++	Medium
150	Evaluate-Reverse-Polish-Notation	C++	Medium
151♣	Reverse-Words-In-A-String	C++, Python	Medium
152♣	Maximum-Product-Subarray	C++	Medium
153	Find-Minimum-In-Rotated-Sorted-Array	C++, Python	Medium
154	Find-Minimum-In-Rotated-Sorted-Array-II	C++	Medium
155♣	Min-Stack	C++, Python	Easy
160	Intersection-Of-Two-Linked-Lists	C++, Python	Easy
162	Find-Peak-Element	C++	Medium
167♣	Two-Sum-II-Input-Array-Is-Sorted	C++, Python	Easy
169♣	Majority-Element	C++, Python	Easy
179	Largest-Number	C++, Python	Medium
188♣	Best-Time-To-Buy-And-Sell-Stock-IV	C++, Python	Hard
189♣	Rotate-Array	C++	Easy
191	Number-Of-1-Bits	C++, Python	Easy
198♣	House-Robber	C++, Python	Easy
199♣	Binary-Tree-Right-Side-View	C++	Medium
200♣	Number-Of-Islands	C++, Python	Medium
202♣	Happy-Number	C++	Easy
203	Remove-Linked-List-Elements	C++, Python	Easy
204♣	Count-Primes	C++)	Easy
205♣	Isomorphic-Strings	C++)	Easy
206♣	Reverse-Linked-List	C++, Python	Easy
209♣	Minimum-Size-Subarray-Sum	C++, Python	Medium
210♣	Course-Schedule-II	C++, Python	Medium
213	House-Robber-II	C++, Python	Easy
215♣	Kth-Largest-Element-In-An-Array	C++, Python	Medium
216♣	Combination-Sum-III	C++	Medium
217♣	Contains-Duplicate	C++	Easy
221♣	Maximal-Square	C++, Python	Medium
225♣	Implement-Stack-Using-Queues	C++, Python	Easy
226	Invert-Binary-Tree	C++, Python	Easy
228	Summary-Ranges	C++	Easy
233	Number-Of-Digit-One	C++, Python	Hard
234	Palindrome-Linked-List	C++	Easy
235♣	Lowest-Common-Ancestor-Of-A-Binary-Search-Tree	C++	Easy
236♣	Lowest-Common-Ancestor-Of-A-Binary-Tree	C++	Medium
237	Delete-Node-In-A-Linked-List	C++, Python	Easy
238♣	Product-Of-Array-Except-Self	C++	Medium
239♣	Sliding-Window-Maximum	C++	Medium
240	Search-A-2D-Matrix-II	C++, Python	Medium
257	Binary-Tree-Paths	C++	Easy
260	Single-Number-III	C++, Python	Medium
263	Ugly-Number	C++, Python	Easy
264	Ugly-Number-II	C++, Python	Medium
268	Missing-Number	C++, Python	Easy
275	H-Index-II	C++	Medium
279	Perfect-Squares	C++, Python	Medium
283	Move-Zeroes	C++, Python	Easy
287♣	Find-The-Duplicate-Number	C++, Python	Medium
289♣	Game-Of-Life	C++	Medium
290♣	Word-Pattern	C++	Easy
295	Find-Median-From-Data-Stream	C++, Python	Hard
297♣	Serialize-And-Deserialize-Binary-Tree	C++, Python	Hard
300	Longest-Increasing-Subsequence	C++, Python	Medium
309♣	Best-Time-To-Buy-And-Sell-Stock-With-Cooldown	C++, Python	Medium
315♣	Count-Of-Smaller-Numbers-After-Self	C++	Hard
316♣	Remove-Duplicate-Letters	C++)	Medium
321♣	Create-Maximum-Number	C++)	Medium
322♣	Coin-Change	C++, Python	Medium
337	House-Robber-III	C++, Python	Medium
343	Integer-Break	C++, Python	Medium
347♣	Top-K-Frequent-Elements	C++	Medium
349♣	Intersection-Of-Two-Arrays	C++	Easy
350♣	Intersection-Of-Two-Arrays-II	C++	Easy
354	Russian-Doll-Envelopes	C++, Python	Hard
355♣	Design-Twitter	C++	Medium
365♣	Water-And-Jug-Problem	C++, Python	Medium
374	Guess-Number-Higher-Or-Lower	C++	Easy
376♣	Wiggle-Subsequence	C++	Medium
378♣	Kth-Smallest-Element-In-A-Sorted-Matrix	C++	Medium
387♣	First-Unique-Character-In-A-String	C++, Python	Easy
389♣	Find-The-Difference	C++	Easy
394♣	Decode-String	C++	Medium
400	Nth-Digit	C++, Python	Meidum
402♣	Remove-K-Digits	C++	Medium
409♣	Longest-Palindrome	C++, Python	Easy
410	Split-Array-Largest-Sum	C++	Hard
415	Add-Strings	C++, Python	Easy
426	Convert-Binary-Search-Tree-To-Sorted-Doubly-Lnked-List	C++, Python	Medium
435♣	Non-Overlapping-Intervals	C++	Medium
438	Find-All-Anagrams-In-A-String	C++	Medium
445♣	Add-Two-Numbers-II	C++	Medium
455♣	Assign-Cookies	C++	Easy
459♣	Repeated-Substring-Pattern	C++	Easy
460♣	LFU-Cache	C++	Hard
463♣	Island-Perimeter	C++	Easy
466♣	Count-The-Repetitions	C++	Hard
470♣	Implement-Rand10-Using-Rand7	C++	Medium
496	Next-Greater-Element-I	C++, Python	Easy
501	Find-Mode-In-Binary-Search-Tree	C++	Easy
503	Next-Greater-Element-II	C++, Python	Meidum
516	Longest-Palindromic-Subsequence	C++, Python	Medium
518	Coin-Change-II	C++	Medium
542♣	01-Matrix	C++	Medium
543♣	Diameter-Of-Binary-Tree	C++, Python	Easy
546♣	Remove-Boxes	C++	Hard
556	Next-Greater-Element-III	C++, Python	Medium
557♣	Reverse-Words-In-A-String-III	C++	Easy
560♣	Subarray-Sum-Equals-K	C++	Medium
563	Binary-Tree-Tilt	C++	Easy
567	Permutation-In-String	C++	Medium
572♣	Subtree-Of-Another-Tree	C++	Easy
605♣	Can-Place-Flowers	C++	Easy
617♣	Merge-Two-Binary-Trees	C++	Easy
621♣	Task-Scheduler	C++	Medium
647♣	Palindromic-Substrings	C++	Medium
649♣	Dota2-Senate	C++	Medium
657♣	Robot-Return-To-Origin	C++	Easy
659♣	Split-Array-Into-Consecutive-Subsequences	C++)	Medium
674	Longest-Continuous-Increasing-Subsequence	C++, Python	Easy
695♣	Max-Area-Of-Island	C++, Python	Easy
696♣	Count-Binary-Substrings	C++	Easy
703	Kth-Largest-Element-In-A-Stream	C++	Easy
704	Binary-Search	C++	Easy
714♣	Best-Time-To-Buy-And-Sell-Stock-With-Transaction-Fee	C++, Python	Medium
718♣	Maximum-Length-Of-Repeated-Subarray	C++	Medium
733♣	Flood-Fill	C++	Medium
738♣	Monotone-Increasing-Digits	C++	Medium
739	Daily-Temperatures	C++, Python	Medium
746♣	Min-Cost-Climbing-Stairs	C++	Medium
771♣	Jewels-And-Stones	C++	Easy
785♣	Is-Graph-Bipartite	C++	Medium
796	Rotate-String	C++, Python	Easy
820♣	Short-Encoding-Of-Words	C++, Python	Easy
830♣	Positions-Of-Large-Groups	C++	Easy
836♣	Rectangle-Overlap	C++, Python	Easy
842♣	Split-Array-Into-Fibonacci-Sequence	C++	Medium
846	Hand-Of-Straights	C++, Python	Medium
852♣	Peak-Index-In-A-Mountain-Array	C++	Easy
860♣	Lemonade-Change	C++	Easy
861♣	Score-After-Flipping-Matrix	C++	Medium
876♣	Middle-Of-The-Linked-List	C++, Python	Easy
887♣	Super-Egg-Drop	C++	Hard
892♣	Surface-Area-Of-3D-Shapes	C++	Easy
912♣	Sort-An-Array	C++	Medium
914♣	X-Of-A-Kind-In-A-Deck-Of-Cards	C++, Python	Easy
941♣	Valid-Mountain-Array	C++	Easy
945♣	Minimum-Increment-To-Make-Array-Unique	C++, Python	Medium
946	Validate-Stack-Sequences	C++, Python	Medium
974♣	Subarray-Sums-Divisible-By-K	C++	Medium
977	Squares-Of-A-Sorted-Array	C++	Easy
983♣	Minimum-Cost-For-Tickets	C++	Medium
983♣	Minimum-Cost-For-Tickets	C++	Medium
986	Interval-List-Intersections	C++	Medium
999♣	Available-Captures-For-Rook	C++, Python	Easy
1013♣	Partition-Array-Into-Three-Parts-With-Equal-Sum	C++, Python	Easy
1014♣	Best-Sightseeing-Pair	C++	Medium
1025♣	Divisor-Game	C++	Easy
1028♣	Recover-A-Tree-From-Preorder-Traversal	C++	Hard
1046♣	Last-Stone-Weight	C++, Python	Easy
1049	Last-Stone-Weight-II	C++, Python	Medium
1071♣	Greatest-Common-Divisor-Of-Strings	C++, Python	Easy
1095♣	Find-In-Mountain-Array	C++	Hard
1103♣	Distribute-Candies-To-People	C++, Python	Easy
1143	Longest-Common-Subsequence	C++, Python	Medium
1160♣	Find-Words-That-Can-Be-Formed-By-Characters	C++, Python	Easy
1162♣	As-Far-From-Land-As-Possible	C++, Python	Medium
1248♣	Count-Number-Of-Nice-Subarrays	C++	Medium
1300♣	Sum-Of-Mutated-Array-Closest-To-Target	C++	Medium
1360	Number-Of-Days-Between-Two-Dates	C++	Easy
1365♣	How-Many-Numbers-Are-Smaller-Than-The-Current-Number	C++	Easy
1371	Find-The-Longest-Substring-Containing-Vowels-In-Even-Counts	C++	Medium
1431	Kids-With-The-Greatest-Number-Of-Candies	C++	Easy
5178	Four-Divisors	C++	Medium
5345	Rank-Teams-By-Votes	C++	Medium
面试题01.06♣	字符串压缩	C++,Python	Easy
面试题01.07♣	旋转矩阵	C++	Meidum
面试题02.01♣	移除重复节点	C++	Easy
面试题08.11♣	旋转矩阵	C++	Meidum
面试题16.11♣	跳水板	C++	Easy
面试题16.03♣	交点	C++	Hard
面试题17.06♣	按摩师	C++,Python	Easy
面试题09♣	用两个栈实现队列	C++	Easy
面试题10♣	合并排序的数组	C++,Python	Easy
面试题13♣	机器人的运动范围	C++	Medium
面试题40♣	最小的k个数	C++,Python	Easy
面试题46♣	把数字翻译成字符串	C++	Medium
面试题51♣	数组中的逆序对	C++	Hard
面试题56♣	数组中数字出现的次数	C++	Medium
面试题57♣	和为s的连续正数序列	C++,Python	Easy
面试题59♣	队列的最大值	C++,Python	Medium
面试题62♣	圆圈中最后剩下的数字	C++	Medium
面试题64♣	求1+2+…+n	C++	Medium
笔试题1♣	提取不重复的整数	C++	Easy
笔试题2♣	病毒检测	C++	Medium
笔试题3♣	考试成绩	C++	Medium
笔试题4♣	石头碰撞	C++	Medium