1-300.md

LeetCode

LeetCode Problems' Solutions [力扣 ∙ 话题分类]

[1-50]	[51-100]	[101-150]	[151-200]	[201-250]	[251-300]
[301-350]	[351-400]	[401-450]	[451-500]	[501-550]	[551-600]
[601-650]	[651-700]	[701-750]	[751-800]	[801-850]	[851-900]
[901-950]	[951-1000]	[1001-1050]	[1051-1100]	[1101-1150]	[1151-1200]
[1201-1250]	[1251-1300]	[1301-1350]	[1351-1400]	[1401-1450]	[1451-1500]

#	Title	Solution	Difficulty
1	Two Sum	Go	Easy
2	Add Two Numbers	Go	Medium
3	Longest Substring Without Repeating Characters	Go	Medium
4	Median of Two Sorted Arrays	Go	Hard
5	Longest Palindromic Substring	Go	Medium
6	ZigZag Conversion	Go	Medium
7	Reverse Integer	Go	Easy
8	String to Integer (atoi)	Go	Medium
9	Palindrome Number	Go	Easy
10	Regular Expression Matching	Go	Hard
11	Container With Most Water	Go	Medium
12	Integer to Roman	Go	Medium
13	Roman to Integer	Go	Easy
14	Longest Common Prefix	Go	Easy
15	3Sum	Go	Medium
16	3Sum Closest	Go	Medium
17	Letter Combinations of a Phone Number	Go	Medium
18	4Sum	Go	Medium
19	Remove Nth Node From End of List	Go	Medium
20	Valid Parentheses	Go	Easy
21	Merge Two Sorted Lists	Go	Easy
22	Generate Parentheses	Go	Medium
23	Merge k Sorted Lists	Go	Hard
24	Swap Nodes in Pairs	Go	Medium
25	Reverse Nodes in k-Group	Go	Hard
26	Remove Duplicates from Sorted Array	Go	Easy
27	Remove Element	Go	Easy
28	Implement strStr()	Go	Easy
29	Divide Two Integers	Go	Medium
30	Substring with Concatenation of All Words	Go	Hard
31	Next Permutation	Go	Medium
32	Longest Valid Parentheses	Go	Hard
33	Search in Rotated Sorted Array	Go	Medium
34	Find First and Last Position of Element in Sorted Array	Go	Medium
35	Search Insert Position	Go	Easy
36	Valid Sudoku	Go	Medium
37	Sudoku Solver	Go	Hard
38	Count and Say	Go	Easy
39	Combination Sum	Go	Medium
40	Combination Sum II	Go	Medium
41	First Missing Positive	Go	Hard
42	Trapping Rain Water	Go	Hard
43	Multiply Strings	Go	Medium
44	Wildcard Matching	Go	Hard
45	Jump Game II	Go	Hard
46	Permutations	Go	Medium
47	Permutations II	Go	Medium
48	Rotate Image	Go	Medium
49	Group Anagrams	Go	Medium
50	Pow(x, n)	Go	Medium
51	N-Queens	Go	Hard
52	N-Queens II	Go	Hard
53	Maximum Subarray	Go	Easy
54	Spiral Matrix	Go	Medium
55	Jump Game	Go	Medium
56	Merge Intervals	Go	Medium
57	Insert Interval	Go	Hard
58	Length of Last Word	Go	Easy
59	Spiral Matrix II	Go	Medium
60	Permutation Sequence	Go	Medium
61	Rotate List	Go	Medium
62	Unique Paths	Go	Medium
63	Unique Paths II	Go	Medium
64	Minimum Path Sum	Go	Medium
65	Valid Number	Go	Hard
66	Plus One	Go	Easy
67	Add Binary	Go	Easy
68	Text Justification	Go	Hard
69	Sqrt(x)	Go	Easy
70	Climbing Stairs	Go	Easy
71	Simplify Path	Go	Medium
72	Edit Distance	Go	Hard
73	Set Matrix Zeroes	Go	Medium
74	Search a 2D Matrix	Go	Medium
75	Sort Colors	Go	Medium
76	Minimum Window Substring	Go	Hard
77	Combinations	Go	Medium
78	Subsets	Go	Medium
79	Word Search	Go	Medium
80	Remove Duplicates from Sorted Array II	Go	Medium
81	Search in Rotated Sorted Array II	Go	Medium
82	Remove Duplicates from Sorted List II	Go	Medium
83	Remove Duplicates from Sorted List	Go	Easy
84	Largest Rectangle in Histogram	Go	Hard
85	Maximal Rectangle	Go	Hard
86	Partition List	Go	Medium
87	Scramble String	Go	Hard
88	Merge Sorted Array	Go	Easy
89	Gray Code	Go	Medium
90	Subsets II	Go	Medium
91	Decode Ways	Go	Medium
92	Reverse Linked List II	Go	Medium
93	Restore IP Addresses	Go	Medium
94	Binary Tree Inorder Traversal	Go	Medium
95	Unique Binary Search Trees II	Go	Medium
96	Unique Binary Search Trees	Go	Medium
97	Interleaving String	Go	Hard
98	Validate Binary Search Tree	Go	Medium
99	Recover Binary Search Tree	Go	Hard
100	Same Tree	Go	Easy
101	Symmetric Tree	Go	Easy
102	Binary Tree Level Order Traversal	Go	Medium
103	Binary Tree Zigzag Level Order Traversal	Go	Medium
104	Maximum Depth of Binary Tree	Go	Easy
105	Construct Binary Tree from Preorder and Inorder Traversal	Go	Medium
106	Construct Binary Tree from Inorder and Postorder Traversal	Go	Medium
107	Binary Tree Level Order Traversal II	Go	Easy
108	Convert Sorted Array to Binary Search Tree	Go	Easy
109	Convert Sorted List to Binary Search Tree	Go	Medium
110	Balanced Binary Tree	Go	Easy
111	Minimum Depth of Binary Tree	Go	Easy
112	Path Sum	Go	Easy
113	Path Sum II	Go	Medium
114	Flatten Binary Tree to Linked List	Go	Medium
115	Distinct Subsequences	Go	Hard
116	Populating Next Right Pointers in Each Node	Go	Medium
117	Populating Next Right Pointers in Each Node II	Go	Medium
118	Pascal's Triangle	Go	Easy
119	Pascal's Triangle II	Go	Easy
120	Triangle	Go	Medium
121	Best Time to Buy and Sell Stock	Go	Easy
122	Best Time to Buy and Sell Stock II	Go	Easy
123	Best Time to Buy and Sell Stock III	Go	Hard
124	Binary Tree Maximum Path Sum	Go	Hard
125	Valid Palindrome	Go	Easy
126	Word Ladder II	Go	Hard
127	Word Ladder	Go	Medium
128	Longest Consecutive Sequence	Go	Hard
129	Sum Root to Leaf Numbers	Go	Medium
130	Surrounded Regions	Go	Medium
131	Palindrome Partitioning	Go	Medium
132	Palindrome Partitioning II	Go	Hard
133	Clone Graph	Go	Medium
134	Gas Station	Go	Medium
135	Candy	Go	Hard
136	Single Number	Go	Easy
137	Single Number II	Go	Medium
138	Copy List with Random Pointer	Go	Medium
139	Word Break	Go	Medium
140	Word Break II	Go	Hard
141	Linked List Cycle	Go	Easy
142	Linked List Cycle II	Go	Medium
143	Reorder List	Go	Medium
144	Binary Tree Preorder Traversal	Go	Medium
145	Binary Tree Postorder Traversal	Go	Hard
146	LRU Cache	Go	Medium
147	Insertion Sort List	Go	Medium
148	Sort List	Go	Medium
149	Max Points on a Line	Go	Hard
150	Evaluate Reverse Polish Notation	Go	Medium
151	Reverse Words in a String	Go	Medium
152	Maximum Product Subarray	Go	Medium
153	Find Minimum in Rotated Sorted Array	Go	Medium
154	Find Minimum in Rotated Sorted Array II	Go	Hard
155	Min Stack	Go	Easy
156	Binary Tree Upside Down 🔒	Go	Medium
157	Read N Characters Given Read4 🔒	Go	Easy
158	Read N Characters Given Read4 II - Call multiple times 🔒	Go	Hard
159	Longest Substring with At Most Two Distinct Characters 🔒	Go	Medium
160	Intersection of Two Linked Lists	Go	Easy
161	One Edit Distance 🔒	Go	Medium
162	Find Peak Element	Go	Medium
163	Missing Ranges 🔒	Go	Medium
164	Maximum Gap	Go	Hard
165	Compare Version Numbers	Go	Medium
166	Fraction to Recurring Decimal	Go	Medium
167	Two Sum II - Input array is sorted	Go	Easy
168	Excel Sheet Column Title	Go	Easy
169	Majority Element	Go	Easy
170	Two Sum III - Data structure design 🔒	Go	Easy
171	Excel Sheet Column Number	Go	Easy
172	Factorial Trailing Zeroes	Go	Easy
173	Binary Search Tree Iterator	Go	Medium
174	Dungeon Game	Go	Hard
175	Combine Two Tables	MySQL	Easy
176	Second Highest Salary	MySQL	Easy
177	Nth Highest Salary	MySQL	Medium
178	Rank Scores	MySQL	Medium
179	Largest Number	Go	Medium
180	Consecutive Numbers	MySQL	Medium
181	Employees Earning More Than Their Managers	MySQL	Easy
182	Duplicate Emails	MySQL	Easy
183	Customers Who Never Order	MySQL	Easy
184	Department Highest Salary	MySQL	Medium
185	Department Top Three Salaries	MySQL	Hard
186	Reverse Words in a String II 🔒	Go	Medium
187	Repeated DNA Sequences	Go	Medium
188	Best Time to Buy and Sell Stock IV	Go	Hard
189	Rotate Array	Go	Easy
190	Reverse Bits	Go	Easy
191	Number of 1 Bits	Go	Easy
192	Word Frequency	Bash	Medium
193	Valid Phone Numbers	Bash	Easy
194	Transpose File	Bash	Medium
195	Tenth Line	Bash	Easy
196	Delete Duplicate Emails	MySQL	Easy
197	Rising Temperature	MySQL	Easy
198	House Robber	Go	Easy
199	Binary Tree Right Side View	Go	Medium
200	Number of Islands	Go	Medium
201	Bitwise AND of Numbers Range	Go	Medium
202	Happy Number	Go	Easy
203	Remove Linked List Elements	Go	Easy
204	Count Primes	Go	Easy
205	Isomorphic Strings	Go	Easy
206	Reverse Linked List	Go	Easy
207	Course Schedule	Go	Medium
208	Implement Trie (Prefix Tree)	Go	Medium
209	Minimum Size Subarray Sum	Go	Medium
210	Course Schedule II	Go	Medium
211	Add and Search Word - Data structure design	Go	Medium
212	Word Search II	Go	Hard
213	House Robber II	Go	Medium
214	Shortest Palindrome	Go	Hard
215	Kth Largest Element in an Array	Go	Medium
216	Combination Sum III	Go	Medium
217	Contains Duplicate	Go	Easy
218	The Skyline Problem	Go	Hard
219	Contains Duplicate II	Go	Easy
220	Contains Duplicate III	Go	Medium
221	Maximal Square	Go	Medium
222	Count Complete Tree Nodes	Go	Medium
223	Rectangle Area	Go	Medium
224	Basic Calculator	Go	Hard
225	Implement Stack using Queues	Go	Easy
226	Invert Binary Tree	Go	Easy
227	Basic Calculator II	Go	Medium
228	Summary Ranges	Go	Medium
229	Majority Element II	Go	Medium
230	Kth Smallest Element in a BST	Go	Medium
231	Power of Two	Go	Easy
232	Implement Queue using Stacks	Go	Easy
233	Number of Digit One	Go	Hard
234	Palindrome Linked List	Go	Easy
235	Lowest Common Ancestor of a Binary Search Tree	Go	Easy
236	Lowest Common Ancestor of a Binary Tree	Go	Medium
237	Delete Node in a Linked List	Go	Easy
238	Product of Array Except Self	Go	Medium
239	Sliding Window Maximum	Go	Hard
240	Search a 2D Matrix II	Go	Medium
241	Different Ways to Add Parentheses	Go	Medium
242	Valid Anagram	Go	Easy
243	Shortest Word Distance 🔒	Go	Easy
244	Shortest Word Distance II 🔒	Go	Medium
245	Shortest Word Distance III 🔒	Go	Medium
246	Strobogrammatic Number 🔒	Go	Easy
247	Strobogrammatic Number II 🔒	Go	Medium
248	Strobogrammatic Number III 🔒	Go	Hard
249	Group Shifted Strings 🔒	Go	Medium
250	Count Univalue Subtrees 🔒	Go	Medium
251	Flatten 2D Vector 🔒	Go	Medium
252	Meeting Rooms 🔒	Go	Easy
253	Meeting Rooms II 🔒	Go	Medium
254	Factor Combinations 🔒	Go	Medium
255	Verify Preorder Sequence in Binary Search Tree 🔒	Go	Medium
256	Paint House 🔒	Go	Easy
257	Binary Tree Paths	Go	Easy
258	Add Digits	Go	Easy
259	3Sum Smaller 🔒	Go	Medium
260	Single Number III	Go	Medium
261	Graph Valid Tree 🔒	Go	Medium
262	Trips and Users	MySQL	Hard
263	Ugly Number	Go	Easy
264	Ugly Number II	Go	Medium
265	Paint House II 🔒	Go	Hard
266	Palindrome Permutation 🔒	Go	Easy
267	Palindrome Permutation II 🔒	Go	Medium
268	Missing Number	Go	Easy
269	Alien Dictionary 🔒	Go	Hard
270	Closest Binary Search Tree Value 🔒	Go	Easy
271	Encode and Decode Strings 🔒	Go	Medium
272	Closest Binary Search Tree Value II 🔒	Go	Hard
273	Integer to English Words	Go	Hard
274	H-Index	Go	Medium
275	H-Index II	Go	Medium
276	Paint Fence 🔒	Go	Easy
277	Find the Celebrity 🔒	Go	Medium
278	First Bad Version	Go	Easy
279	Perfect Squares	Go	Medium
280	Wiggle Sort 🔒	Go	Medium
281	Zigzag Iterator 🔒	Go	Medium
282	Expression Add Operators	Go	Hard
283	Move Zeroes	Go	Easy
284	Peeking Iterator	Go	Medium
285	Inorder Successor in BST 🔒	Go	Medium
286	Walls and Gates 🔒	Go	Medium
287	Find the Duplicate Number	Go	Medium
288	Unique Word Abbreviation 🔒	Go	Medium
289	Game of Life	Go	Medium
290	Word Pattern	Go	Easy
291	Word Pattern II 🔒	Go	Hard
292	Nim Game	Go	Easy
293	Flip Game 🔒	Go	Easy
294	Flip Game II 🔒	Go	Medium
295	Find Median from Data Stream	Go	Hard
296	Best Meeting Point 🔒	Go	Hard
297	Serialize and Deserialize Binary Tree	Go	Hard
298	Binary Tree Longest Consecutive Sequence 🔒	Go	Medium
299	Bulls and Cows	Go	Easy
300	Longest Increasing Subsequence	Go	Medium