LeetCode

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LeetCode Problems

序号	标题	代码	题解	难度	备注
1	1. Two Sum	{source_base_url}/_0001_TwoSum.java[Java]	题解	Easy
2	2. Add Two Numbers	{source_base_url}/_0002_AddTwoNumbers.java[Java]	题解	Medium
3	3. Longest Substring Without Repeating Characters	{source_base_url}/_0003_LongestSubstringWithoutRepeatingCharacters.java[Java]	题解	Medium
4	4. Median of Two Sorted Arrays	{source_base_url}/_0004_MedianOfTwoSortedArrays.java[Java]	题解	Hard
5	5. Longest Palindromic Substring	{source_base_url}/_0005_LongestPalindromicSubstring.java[Java]	题解	Medium
6	6. ZigZag Conversion	{source_base_url}/_0006_ZigZagConversion.java[Java]	题解	Medium
7	7. Reverse Integer	{source_base_url}/_0007_ReverseInteger.java[Java]	题解	Easy
8	8. String to Integer (atoi)	{source_base_url}/_0008_StringToIntegerAtoi.java[Java]	题解	Medium
9	9. Palindrome Number	{source_base_url}/_0009_PalindromeNumber.java[Java]	题解	Easy
10	11. Container With Most Water	{source_base_url}/_0011_ContainerWithMostWater.java[Java]	题解	Medium
11	12. Integer to Roman	{source_base_url}/_0012_IntegerToRoman.java[Java]	题解	Medium
12	13. Roman to Integer	{source_base_url}/_0013_RomanToInteger.java[Java]	题解	Easy
13	14. Longest Common Prefix	{source_base_url}/_0014_LongestCommonPrefix.java[Java]	题解	Easy
14	15. 3Sum	{source_base_url}/_0015_3Sum.java[Java]	题解	Medium	双指针
15	16. 3Sum Closest	{source_base_url}/_0016_3SumClosest.java[Java]	题解	Medium
16	17. Letter Combinations of a Phone Number	{source_base_url}/_0017_LetterCombinationsOfAPhoneNumber.java[Java]	题解	Medium
17	18. 4Sum	{source_base_url}/_0018_4Sum.java[Java]	题解	Medium	双指针
18	19. Remove Nth Node From End of List	{source_base_url}/_0019_RemoveNthNodeFromEndOfList.java[Java]	题解	Medium
19	20. Valid Parentheses	{source_base_url}/_0020_ValidParentheses.java[Java]	题解	Easy
20	21. Merge Two Sorted Lists	{source_base_url}/_0021_MergeTwoSortedLists.java[Java]	题解	Easy
21	22. Generate Parentheses	{source_base_url}/_0022_GenerateParentheses.java[Java]	题解	Medium
22	23. Merge k Sorted Lists	{source_base_url}/_0023_MergeKSortedLists.java[Java]	题解	Hard
23	24. Swap Nodes in Pairs	{source_base_url}/_0024_SwapNodesInPairs.java[Java]	题解	Medium
24	25. Reverse Nodes in k-Group	{source_base_url}/_0025_ReverseNodesInKGroup.java[Java]	题解	Hard
25	26. Remove Duplicates from Sorted Array	{source_base_url}/_0026_RemoveDuplicatesFromSortedArray.java[Java]	题解	Easy
26	27. Remove Element	{source_base_url}/_0027_RemoveElement.java[Java]	题解	Easy
27	28. 找出字符串中第一个匹配项的下标	{source_base_url}/_0028_FindTheIndexOfTheFirstOccurrenceInAString.java[Java]	题解	Easy
28	29. Divide Two Integers	{source_base_url}/_0029_DivideTwoIntegers.java[Java]	题解	Medium
29	30. Substring with Concatenation of All Words	{source_base_url}/_0030_SubstringWithConcatenationOfAllWords.java[Java]	题解	Hard
30	31. Next Permutation	{source_base_url}/_0031_NextPermutation.java[Java]	题解	Medium
31	32. Longest Valid Parentheses	{source_base_url}/_0032_LongestValidParentheses.java[Java]	题解	Hard
32	33. Search in Rotated Sorted Array	{source_base_url}/_0033_SearchInRotatedSortedArray.java[Java]	题解	Medium
33	34. Find First and Last Position of Element in Sorted Array	{source_base_url}/_0034_FindFirstAndLastPositionOfElementInSortedArray.java[Java]	题解	Medium
34	35. Search Insert Position	{source_base_url}/_0035_SearchInsertPosition.java[Java]	题解	Easy
35	36. Valid Sudoku	{source_base_url}/_0036_ValidSudoku.java[Java]	题解	Medium
36	37. Sudoku Solver	{source_base_url}/_0037_SudokuSolver.java[Java]	题解	Hard
37	38. Count and Say	{source_base_url}/_0038_CountAndSay.java[Java]	题解	Easy
38	39. Combination Sum	{source_base_url}/_0039_CombinationSum.java[Java]	题解	Medium
39	40. Combination Sum II	{source_base_url}/_0040_CombinationSumII.java[Java]	题解	Medium
40	41. First Missing Positive	{source_base_url}/_0041_FirstMissingPositive.java[Java]	题解	Hard
41	42. Trapping Rain Water	{source_base_url}/_0042_TrappingRainWater.java[Java]	题解	Hard	单调栈
42	43. Multiply Strings	{source_base_url}/_0043_MultiplyStrings.java[Java]	题解	Medium
43	44. Wildcard Matching	{source_base_url}/_0044_WildcardMatching.java[Java]	题解	Hard
44	45. Jump Game II	{source_base_url}/_0045_JumpGameII.java[Java]	题解	Hard
45	46. Permutations	{source_base_url}/_0046_Permutations.java[Java]	题解	Medium
46	47. Permutations II	{source_base_url}/_0047_PermutationsII.java[Java]	题解	Medium
47	48. Rotate Image	{source_base_url}/_0048_RotateImage.java[Java]	题解	Medium
48	49. Group Anagrams	{source_base_url}/_0049_GroupAnagrams.java[Java]	题解	Medium
49	50. Pow(x, n)	{source_base_url}/_0050_PowXN.java[Java]	题解	Medium
50	51. N-Queens	{source_base_url}/_0051_NQueens.java[Java]	题解	Hard
51	52. N-Queens II	{source_base_url}/_0052_NQueensII.java[Java]	题解	Hard
52	53. Maximum Subarray	{source_base_url}/_0053_MaximumSubarray.java[Java]	题解	Medium
53	54. Spiral Matrix	{source_base_url}/_0054_SpiralMatrix.java[Java]	题解	Medium
54	55. Jump Game	{source_base_url}/_0055_JumpGame.java[Java]	题解	Medium
55	56. Merge Intervals	{source_base_url}/_0056_MergeIntervals.java[Java]	题解	Medium
56	57. Insert Interval	{source_base_url}/_0057_InsertInterval.java[Java]	题解	Hard
57	58. Length of Last Word	{source_base_url}/_0058_LengthOfLastWord.java[Java]	题解	Easy
58	59. Spiral Matrix II	{source_base_url}/_0059_SpiralMatrixII.java[Java]	题解	Medium
59	60. Permutation Sequence	{source_base_url}/_0060_PermutationSequence.java[Java]	题解	Medium
60	61. Rotate List	{source_base_url}/_0061_RotateList.java[Java]	题解	Medium
61	62. Unique Paths	{source_base_url}/_0062_UniquePaths.java[Java]	题解	Medium
62	63. Unique Paths II	{source_base_url}/_0063_UniquePathsII.java[Java]	题解	Medium
63	64. Minimum Path Sum	{source_base_url}/_0064_MinimumPathSum.java[Java]	题解	Medium
64	66. Plus One	{source_base_url}/_0066_PlusOne.java[Java]	题解	Easy
65	67. Add Binary	{source_base_url}/_0067_AddBinary.java[Java]	题解	Easy
66	68. Text Justification	{source_base_url}/_0068_TextJustification.java[Java]	题解	Hard
67	69. Sqrt(x)	{source_base_url}/_0069_SqrtX.java[Java]	题解	Easy
68	70. Climbing Stairs	{source_base_url}/_0070_ClimbingStairs.java[Java]	题解	Easy
69	71. Simplify Path	{source_base_url}/_0071_SimplifyPath.java[Java]	题解	Medium
70	72. Edit Distance	{source_base_url}/_0072_EditDistance.java[Java]	题解	Hard
71	73. Set Matrix Zeroes	{source_base_url}/_0073_SetMatrixZeroes.java[Java]	题解	Medium
72	74. Search a 2D Matrix	{source_base_url}/_0074_SearchA2DMatrix.java[Java]	题解	Medium
73	75. Sort Colors	{source_base_url}/_0075_SortColors.java[Java]	题解	Medium
74	76. Minimum Window Substring	{source_base_url}/_0076_MinimumWindowSubstring.java[Java]	题解	Hard
75	77. Combinations	{source_base_url}/_0077_Combinations.java[Java]	题解	Medium
76	78. Subsets	{source_base_url}/_0078_Subsets.java[Java]	题解	Medium
77	79. Word Search	{source_base_url}/_0079_WordSearch.java[Java]	题解	Medium
78	80. Remove Duplicates from Sorted Array II	{source_base_url}/_0080_RemoveDuplicatesFromSortedArrayII.java[Java]	题解	Medium
79	81. Search in Rotated Sorted Array II	{source_base_url}/_0081_SearchInRotatedSortedArrayII.java[Java]	题解	Medium
80	82. Remove Duplicates from Sorted List II	{source_base_url}/_0082_RemoveDuplicatesFromSortedListII.java[Java]	题解	Medium
81	83. Remove Duplicates from Sorted List	{source_base_url}/_0083_RemoveDuplicatesFromSortedList.java[Java]	题解	Easy
82	84. Largest Rectangle in Histogram	{source_base_url}/_0084_LargestRectangleInHistogram.java[Java]	题解	Hard
83	85. Maximal Rectangle	{source_base_url}/_0085_MaximalRectangle.java[Java]	题解	Hard
84	86. Partition List	{source_base_url}/_0086_PartitionList.java[Java]	题解	Medium
85	88. Merge Sorted Array	{source_base_url}/_0088_MergeSortedArray.java[Java]	题解	Easy
86	89. Gray Code	{source_base_url}/_0089_GrayCode.java[Java]	题解	Medium
87	90. Subsets II	{source_base_url}/_0090_SubsetsII.java[Java]	题解	Medium
88	91. Decode Ways	{source_base_url}/_0091_DecodeWays.java[Java]	题解	Medium
89	92. Reverse Linked List II	{source_base_url}/_0092_ReverseLinkedListII.java[Java]	题解	Medium
90	93. Restore IP Addresses	{source_base_url}/_0093_RestoreIPAddresses.java[Java]	题解	Medium
91	94. Binary Tree Inorder Traversal	{source_base_url}/_0094_BinaryTreeInorderTraversal.java[Java]	题解	Medium
92	95. Unique Binary Search Trees II	{source_base_url}/_0095_UniqueBinarySearchTreesII.java[Java]	题解	Medium
93	96. Unique Binary Search Trees	{source_base_url}/_0096_UniqueBinarySearchTrees.java[Java]	题解	Medium
94	97. Interleaving String	{source_base_url}/_0097_InterleavingString.java[Java]	题解	Hard
95	98. Validate Binary Search Tree	{source_base_url}/_0098_ValidateBinarySearchTree.java[Java]	题解	Medium	树形DP套路或中序遍历
96	99. Recover Binary Search Tree	{source_base_url}/_0099_RecoverBinarySearchTree.java[Java]	题解	Medium	Morris遍历
97	100. Same Tree	{source_base_url}/_0100_SameTree.java[Java]	题解	Easy
98	101. Symmetric Tree	{source_base_url}/_0101_SymmetricTree.java[Java]	题解	Easy
99	102. Binary Tree Level Order Traversal	{source_base_url}/_0102_BinaryTreeLevelOrderTraversal.java[Java]	题解	Medium
100	103. Binary Tree Zigzag Level Order Traversal	{source_base_url}/_0103_BinaryTreeZigzagLevelOrderTraversal.java[Java]	题解	Medium
101	104. Maximum Depth of Binary Tree	{source_base_url}/_0104_MaximumDepthOfBinaryTree.java[Java]	题解	Easy
102	105. Construct Binary Tree from Preorder and Inorder Traversal	{source_base_url}/_0105_ConstructBinaryTreeFromPreorderAndInorderTraversal.java[Java]	题解	Medium	迭代如何实现？
103	106. Construct Binary Tree from Inorder and Postorder Traversal	{source_base_url}/_0106_ConstructBinaryTreeFromInorderAndPostorderTraversal.java[Java]	题解	Medium	迭代如何实现？
104	107. Binary Tree Level Order Traversal II	{source_base_url}/_0107_BinaryTreeLevelOrderTraversalII.java[Java]	题解	Easy
105	108. Convert Sorted Array to Binary Search Tree	{source_base_url}/_0108_ConvertSortedArrayToBinarySearchTree.java[Java]	题解	Easy
106	109. Convert Sorted List to Binary Search Tree	{source_base_url}/_0109_ConvertSortedListToBinarySearchTree.java[Java]	题解	Medium	分治+中序遍历
107	110. Balanced Binary Tree	{source_base_url}/_0110_BalancedBinaryTree.java[Java]	题解	Easy
108	111. Minimum Depth of Binary Tree	{source_base_url}/_0111_MinimumDepthOfBinaryTree.java[Java]	题解	Easy	Morris解法需要深入研究
109	112. Path Sum	{source_base_url}/_0112_PathSum.java[Java]	题解	Easy
110	113. Path Sum II	{source_base_url}/_0113_PathSumII.java[Java]	题解	Medium
111	114. Flatten Binary Tree to Linked List	{source_base_url}/_0114_FlattenBinaryTreeToLinkedList.java[Java]	题解	Medium
112	115. Distinct Subsequences	{source_base_url}/_0115_DistinctSubsequences.java[Java]	题解	Hard
113	116. Populating Next Right Pointers in Each Node	{source_base_url}/_0116_PopulatingNextRightPointersInEachNode.java[Java]	题解	Medium
114	117. Populating Next Right Pointers in Each Node II	{source_base_url}/_0117_PopulatingNextRightPointersInEachNodeII.java[Java]	题解	Medium
115	118. Pascal’s Triangle	{source_base_url}/_0118_PascalSTriangle.java[Java]	题解	Easy
116	119. Pascal’s Triangle II	{source_base_url}/_0119_PascalSTriangleII.java[Java]	题解	Easy
117	120. Triangle	{source_base_url}/_0120_Triangle.java[Java]	题解	Medium
118	121. Best Time to Buy and Sell Stock	{source_base_url}/_0121_BestTimeToBuyAndSellStock.java[Java]	题解	Easy
119	122. Best Time to Buy and Sell Stock II	{source_base_url}/_0122_BestTimeToBuyAndSellStockII.java[Java]	题解	Easy
120	123. Best Time to Buy and Sell Stock III	{source_base_url}/_0123_BestTimeToBuyAndSellStockIII.java[Java]	题解	Hard
121	124. Binary Tree Maximum Path Sum	{source_base_url}/_0124_BinaryTreeMaximumPathSum.java[Java]	题解	Hard
122	125. Valid Palindrome	{source_base_url}/_0125_ValidPalindrome.java[Java]	题解	Easy
123	127. Word Ladder	{source_base_url}/_0127_WordLadder.java[Java]	题解	Medium
124	128. Longest Consecutive Sequence	{source_base_url}/_0128_LongestConsecutiveSequence.java[Java]	题解	Hard
125	129. Sum Root to Leaf Numbers	{source_base_url}/_0129_SumRootToLeafNumbers.java[Java]	题解	Medium
126	130. Surrounded Regions	{source_base_url}/_0130_SurroundedRegions.java[Java]	题解	Medium
127	131. Palindrome Partitioning	{source_base_url}/_0131_PalindromePartitioning.java[Java]	题解	Medium
128	133. Clone Graph	{source_base_url}/_0133_CloneGraph.java[Java]	题解	Medium
129	134. Gas Station	{source_base_url}/_0134_GasStation.java[Java]	题解	Medium
130	135. Candy	{source_base_url}/_0135_Candy.java[Java]	题解	Hard
131	136. Single Number	{source_base_url}/_0136_SingleNumber.java[Java]	题解	Easy
132	137. Single Number II	{source_base_url}/_0137_SingleNumberII.java[Java]	题解	Medium
133	138. Copy List with Random Pointer	{source_base_url}/_0138_CopyListWithRandomPointer.java[Java]	题解	Medium
134	139. Word Break	{source_base_url}/_0139_WordBreak.java[Java]	题解	Medium
135	140. Word Break II	{source_base_url}/_0140_WordBreakII.java[Java]	题解	Hard
136	141. Linked List Cycle	{source_base_url}/_0141_LinkedListCycle.java[Java]	题解	Easy
137	142. Linked List Cycle II	{source_base_url}/_0142_LinkedListCycleII.java[Java]	题解	Medium
138	143. Reorder List	{source_base_url}/_0143_ReorderList.java[Java]	题解	Medium
139	144. Binary Tree Preorder Traversal	{source_base_url}/_0144_BinaryTreePreorderTraversal.java[Java]	题解	Medium
140	145. Binary Tree Postorder Traversal	{source_base_url}/_0145_BinaryTreePostorderTraversal.java[Java]	题解	Easy	强化迭代
141	146. LRU Cache	{source_base_url}/_0146_LRUCache.java[Java]	题解	Medium
142	147. Insertion Sort List	{source_base_url}/_0147_InsertionSortList.java[Java]	题解	Medium
143	148. Sort List	{source_base_url}/_0148_SortList.java[Java]	题解	Medium
144	149. Max Points on a Line	{source_base_url}/_0149_MaxPointsOnALine.java[Java]	题解	Hard
145	150. Evaluate Reverse Polish Notation	{source_base_url}/_0150_EvaluateReversePolishNotation.java[Java]	题解	Medium
146	151. Reverse Words in a String	{source_base_url}/_0151_ReverseWordsInAString.java[Java]	题解	Medium
147	152. Maximum Product Subarray	{source_base_url}/_0152_MaximumProductSubarray.java[Java]	题解	Medium
148	153. Find Minimum in Rotated Sorted Array	{source_base_url}/_0153_FindMinimumInRotatedSortedArray.java[Java]	题解	Medium
149	154. Find Minimum in Rotated Sorted Array II	{source_base_url}/_0154_FindMinimumInRotatedSortedArrayII.java[Java]	题解	Hard
150	155. Min Stack	{source_base_url}/_0155_MinStack.java[Java]	题解	Easy
151	160. Intersection of Two Linked Lists	{source_base_url}/_0160_IntersectionOfTwoLinkedLists.java[Java]	题解	Easy
152	162. Find Peak Element	{source_base_url}/_0162_FindPeakElement.java[Java]	题解	Medium
153	164. Maximum Gap	{source_base_url}/_0164_MaximumGap.java[Java]	题解	Hard
154	165. Compare Version Numbers	{source_base_url}/_0165_CompareVersionNumbers.java[Java]	题解	Medium
155	166. Fraction to Recurring Decimal	{source_base_url}/_0166_FractionToRecurringDecimal.java[Java]	题解	Medium
156	167. Two Sum II - Input array is sorted	{source_base_url}/_0167_TwoSumIIInputArrayIsSorted.java[Java]	题解	Easy
157	168. Excel Sheet Column Title	{source_base_url}/_0168_ExcelSheetColumnTitle.java[Java]	题解	Easy
158	169. Majority Element	{source_base_url}/_0169_MajorityElement.java[Java]	题解	Easy
159	171. Excel Sheet Column Number	{source_base_url}/_0171_ExcelSheetColumnNumber.java[Java]	题解	Easy
160	172. Factorial Trailing Zeroes	{source_base_url}/_0172_FactorialTrailingZeroes.java[Java]	题解	Easy
161	173. Binary Search Tree Iterator	{source_base_url}/_0173_BinarySearchTreeIterator.java[Java]	题解	Medium
162	174. Dungeon Game	{source_base_url}/_0174_DungeonGame.java[Java]	题解	Hard
163	175. Combine Two Tables	{source_base_url}/_0175_CombineTwoTables.sql[SQL]	题解	Easy
164	176. Second Highest Salary	{source_base_url}/_0176_SecondHighestSalary.sql[SQL]	题解	Easy
165	179. Largest Number	{source_base_url}/_0179_LargestNumber.java[Java]	题解	Medium
166	187. Repeated DNA Sequences	{source_base_url}/_0187_RepeatedDNASequences.java[Java]	题解	Medium
167	188. Best Time to Buy and Sell Stock IV	{source_base_url}/_0188_BestTimeToBuyAndSellStockIV.java[Java]	题解	Hard
168	189. Rotate Array	{source_base_url}/_0189_RotateArray.java[Java]	题解	Easy
169	190. Reverse Bits	{source_base_url}/_0190_ReverseBits.java[Java]	题解	Easy
170	191. Number of 1 Bits	{source_base_url}/_0191_NumberOf1Bits.java[Java]	题解	Easy
171	192. Word Frequency	{source_base_url}/_0192_WordFrequency.java[Java]	题解	Medium
172	198. House Robber	{source_base_url}/_0198_HouseRobber.java[Java]	题解	Easy
173	199. Binary Tree Right Side View	{source_base_url}/_0199_BinaryTreeRightSideView.java[Java]	题解	Medium	递归+DFS解法有意思
174	200. Number of Islands	{source_base_url}/_0200_NumberOfIslands.java[Java]	题解	Medium
175	201. Bitwise AND of Numbers Range	{source_base_url}/_0201_BitwiseANDOfNumbersRange.java[Java]	题解	Medium
176	202. Happy Number	{source_base_url}/_0202_HappyNumber.java[Java]	题解	Easy
177	203. Remove Linked List Elements	{source_base_url}/_0203_RemoveLinkedListElements.java[Java]	题解	Easy
178	204. Count Primes	{source_base_url}/_0204_CountPrimes.java[Java]	题解	Easy
179	205. Isomorphic Strings	{source_base_url}/_0205_IsomorphicStrings.java[Java]	题解	Easy
180	206. Reverse Linked List	{source_base_url}/_0206_ReverseLinkedList.java[Java]	题解	Easy
181	207. Course Schedule	{source_base_url}/_0207_CourseSchedule.java[Java]	题解	Medium
182	208. Implement Trie (Prefix Tree)	{source_base_url}/_0208_ImplementTriePrefixTree.java[Java]	题解	Medium
183	209. Minimum Size Subarray Sum	{source_base_url}/_0209_MinimumSizeSubarraySum.java[Java]	题解	Medium
184	210. Course Schedule II	{source_base_url}/_0210_CourseScheduleII.java[Java]	题解	Medium
185	211. 添加与搜索单词 - 数据结构设计	{source_base_url}/_0211_DesignAddAndSearchWordsDataStructure.java[Java]	题解	Medium
186	212. Word Search II	{source_base_url}/_0212_WordSearchII.java[Java]	题解	Hard
187	213. House Robber II	{source_base_url}/_0213_HouseRobberII.java[Java]	题解	Medium
188	214. Shortest Palindrome	{source_base_url}/_0214_ShortestPalindrome.java[Java]	题解	Hard
189	215. Kth Largest Element in an Array	{source_base_url}/_0215_KthLargestElementInAnArray.java[Java]	题解	Medium
190	216. Combination Sum III	{source_base_url}/_0216_CombinationSumIII.java[Java]	题解	Medium
191	217. Contains Duplicate	{source_base_url}/_0217_ContainsDuplicate.java[Java]	题解	Easy
192	219. Contains Duplicate II	{source_base_url}/_0219_ContainsDuplicateII.java[Java]	题解	Easy
193	221. Maximal Square	{source_base_url}/_0221_MaximalSquare.java[Java]	题解	Medium
194	222. Count Complete Tree Nodes	{source_base_url}/_0222_CountCompleteTreeNodes.java[Java]	题解	Medium
195	223. Rectangle Area	{source_base_url}/_0223_RectangleArea.java[Java]	题解	Medium
196	224. Basic Calculator	{source_base_url}/_0224_BasicCalculator.java[Java]	题解	Hard
197	225. Implement Stack using Queues	{source_base_url}/_0225_ImplementStackUsingQueues.java[Java]	题解	Easy
198	226. Invert Binary Tree	{source_base_url}/_0226_InvertBinaryTree.java[Java]	题解	Easy
199	227. Basic Calculator II	{source_base_url}/_0227_BasicCalculatorIi.java[Java]	题解	Medium
200	228. Summary Ranges	{source_base_url}/_0228_SummaryRanges.java[Java]	题解	Medium
201	229. Majority Element II	{source_base_url}/_0229_MajorityElementII.java[Java]	题解	Medium
202	230. Kth Smallest Element in a BST	{source_base_url}/_0230_KthSmallestElementInABst.java[Java]	题解	Medium
203	231. Power of Two	{source_base_url}/_0231_PowerOfTwo.java[Java]	题解	Easy
204	232. Implement Queue using Stacks	{source_base_url}/_0232_ImplementQueueUsingStacks.java[Java]	题解	Easy
205	234. Palindrome Linked List	{source_base_url}/_0234_PalindromeLinkedList.java[Java]	题解	Easy
206	235. Lowest Common Ancestor of a Binary Search Tree	{source_base_url}/_0235_LowestCommonAncestorOfABinarySearchTree.java[Java]	题解	Easy	二叉搜索树左大右小的特性
207	236. Lowest Common Ancestor of a Binary Tree	{source_base_url}/_0236_LowestCommonAncestorOfABinaryTree.java[Java]	题解	Medium
208	237. Delete Node in a Linked List	{source_base_url}/_0237_DeleteNodeInALinkedList.java[Java]	题解	Easy
209	238. Product of Array Except Self	{source_base_url}/_0238_ProductOfArrayExceptSelf.java[Java]	题解	Medium
210	239. Sliding Window Maximum	{source_base_url}/_0239_SlidingWindowMaximum.java[Java]	题解	Hard
211	240. Search a 2D Matrix II	{source_base_url}/_0240_SearchA2DMatrixII.java[Java]	题解	Medium
212	241. Different Ways to Add Parentheses	{source_base_url}/_0241_DifferentWaysToAddParentheses.java[Java]	题解	Medium
213	242. Valid Anagram	{source_base_url}/_0242_ValidAnagram.java[Java]	题解	Easy
214	257. Binary Tree Paths	{source_base_url}/_0257_BinaryTreePaths.java[Java]	题解	Easy
215	258. Add Digits	{source_base_url}/_0258_AddDigits.java[Java]	题解	Easy
216	260. Single Number III	{source_base_url}/_0260_SingleNumberIII.java[Java]	题解	Medium
217	263. Ugly Number	{source_base_url}/_0263_UglyNumber.java[Java]	题解	Easy
218	264. Ugly Number II	{source_base_url}/_0264_UglyNumberII.java[Java]	题解	Medium
219	268. Missing Number	{source_base_url}/_0268_MissingNumber.java[Java]	题解	Easy
220	274. H-Index	{source_base_url}/_0274_HIndex.java[Java]	题解	Medium
221	275. H-Index II	{source_base_url}/_0275_HIndexII.java[Java]	题解	Medium
222	278. First Bad Version	{source_base_url}/_0278_FirstBadVersion.java[Java]	题解	Easy
223	279. Perfect Squares	{source_base_url}/_0279_PerfectSquares.java[Java]	题解	Medium
224	282. Expression Add Operators	{source_base_url}/_0282_ExpressionAddOperators.java[Java]	题解	Hard
225	283. Move Zeroes	{source_base_url}/_0283_MoveZeroes.java[Java]	题解	Easy
226	284. Peeking Iterator	{source_base_url}/_0284_PeekingIterator.java[Java]	题解	Medium
227	287. Find the Duplicate Number	{source_base_url}/_0287_FindTheDuplicateNumber.java[Java]	题解	Medium
228	289. Game of Life	{source_base_url}/_0289_GameOfLife.java[Java]	题解	Medium
229	290. Word Pattern	{source_base_url}/_0290_WordPattern.java[Java]	题解	Easy
230	292. Nim Game	{source_base_url}/_0292_NimGame.java[Java]	题解	Easy
231	295. Find Median from Data Stream	{source_base_url}/_0295_FindMedianFromDataStream.java[Java]	题解	Hard
232	297. Serialize and Deserialize Binary Tree	{source_base_url}/_0297_SerializeAndDeserializeBinaryTree.java[Java]	题解	Hard	注意思维误区！
233	300. Longest Increasing Subsequence	{source_base_url}/_0300_LongestIncreasingSubsequence.java[Java]	题解	Medium
234	303. Range Sum Query - Immutable	{source_base_url}/_0303_RangeSumQueryImmutable.java[Java]	题解	Easy
235	304. Range Sum Query 2D - Immutable	{source_base_url}/_0304_RangeSumQuery2DImmutable.java[Java]	题解	Medium
236	306. Additive Number	{source_base_url}/_0306_AdditiveNumber.java[Java]	题解	Medium
237	309. Best Time to Buy and Sell Stock with Cooldown	{source_base_url}/_0309_BestTimeToBuyAndSellStockWithCooldown.java[Java]	题解	Medium
238	310. Minimum Height Trees	{source_base_url}/_0310_MinimumHeightTrees.java[Java]	题解	Medium
239	313. Super Ugly Number	{source_base_url}/_0313_SuperUglyNumber.java[Java]	题解	Medium
240	316. Remove Duplicate Letters	{source_base_url}/_0316_RemoveDuplicateLetters.java[Java]	题解	Hard
241	318. Maximum Product of Word Lengths	{source_base_url}/_0318_MaximumProductOfWordLengths.java[Java]	题解	Medium
242	319. Bulb Switcher	{source_base_url}/_0319_BulbSwitcher.java[Java]	题解	Medium
243	322. Coin Change	{source_base_url}/_0322_CoinChange.java[Java]	题解	Medium
244	324. Wiggle Sort II	{source_base_url}/_0324_WiggleSortII.java[Java]	题解	Medium
245	326. Power of Three	{source_base_url}/_0326_PowerOfThree.java[Java]	题解	Easy
246	328. Odd Even Linked List	{source_base_url}/_0328_OddEvenLinkedList.java[Java]	题解	Medium
247	334. Increasing Triplet Subsequence	{source_base_url}/_0334_IncreasingTripletSubsequence.java[Java]	题解	Medium
248	337. House Robber III	{source_base_url}/_0337_HouseRobberIII.java[Java]	题解	Medium
249	338. Counting Bits	{source_base_url}/_0338_CountingBits.java[Java]	题解	Medium
250	341. Flatten Nested List Iterator	{source_base_url}/_0341_FlattenNestedListIterator.java[Java]	题解	Medium
251	342. Power of Four	{source_base_url}/_0342_PowerOfFour.java[Java]	题解	Easy
252	343. Integer Break	{source_base_url}/_0343_IntegerBreak.java[Java]	题解	Medium
253	344. Reverse String	{source_base_url}/_0344_ReverseString.java[Java]	题解	Easy
254	345. Reverse Vowels of a String	{source_base_url}/_0345_ReverseVowelsOfAString.java[Java]	题解	Easy
255	347. Top K Frequent Elements	{source_base_url}/_0347_TopKFrequentElements.java[Java]	题解	Medium
256	349. Intersection of Two Arrays	{source_base_url}/_0349_IntersectionOfTwoArrays.java[Java]	题解	Easy
257	350. Intersection of Two Arrays II	{source_base_url}/_0350_IntersectionOfTwoArraysIi.java[Java]	题解	Easy
258	355. Design Twitter	{source_base_url}/_0355_DesignTwitter.java[Java]	题解	Medium
259	357. Count Numbers with Unique Digits	{source_base_url}/_0357_CountNumbersWithUniqueDigits.java[Java]	题解	Medium
260	365. Water and Jug Problem	{source_base_url}/_0365_WaterAndJugProblem.java[Java]	题解	Medium
261	367. Valid Perfect Square	{source_base_url}/_0367_ValidPerfectSquare.java[Java]	题解	Easy
262	368. Largest Divisible Subset	{source_base_url}/_0368_LargestDivisibleSubset.java[Java]	题解	Medium
263	370. Range Addition	{source_base_url}/_0370_RangeAddition.java[Java]	题解	Medium	Plus专题
264	371. Sum of Two Integers	{source_base_url}/_0371_SumOfTwoIntegers.java[Java]	题解	Easy
265	372. Super Pow	{source_base_url}/_0372_SuperPow.java[Java]	题解	Medium
266	373. Find K Pairs with Smallest Sums	{source_base_url}/_0373_FindKPairsWithSmallestSums.java[Java]	题解	Medium
267	374. Guess Number Higher or Lower	{source_base_url}/_0374_GuessNumberHigherOrLower.java[Java]	题解	Easy
268	376. Wiggle Subsequence	{source_base_url}/_0376_WiggleSubsequence.java[Java]	题解	Medium
269	377. Combination Sum IV	{source_base_url}/_0377_CombinationSumIV.java[Java]	题解	Medium
270	378. Kth Smallest Element in a Sorted Matrix	{source_base_url}/_0378_KthSmallestElementInASortedMatrix.java[Java]	题解	Medium
271	380. Insert Delete GetRandom O(1)	{source_base_url}/_0380_InsertDeleteGetRandomO1.java[Java]	题解	Medium
272	382. Linked List Random Node	{source_base_url}/_0382_LinkedListRandomNode.java[Java]	题解	Medium
273	383. Ransom Note	{source_base_url}/_0383_RansomNote.java[Java]	题解	Easy
274	384. Shuffle an Array	{source_base_url}/_0384_ShuffleAnArray.java[Java]	题解	Medium
275	387. First Unique Character in a String	{source_base_url}/_0387_FirstUniqueCharacterInAString.java[Java]	题解	Easy
276	389. Find the Difference	{source_base_url}/_0389_FindTheDifference.java[Java]	题解	Easy
277	392. Is Subsequence	{source_base_url}/_0392_IsSubsequence.java[Java]	题解	Easy
278	393. UTF-8 Validation	{source_base_url}/_0393_UTF8Validation.java[Java]	题解	Medium
279	394. Decode String	{source_base_url}/_0394_DecodeString.java[Java]	题解	Medium
280	395. Longest Substring with At Least K Repeating Characters	{source_base_url}/_0395_LongestSubstringWithAtLeastKRepeatingCharacters.java[Java]	题解	Medium
281	396. Rotate Function	{source_base_url}/_0396_RotateFunction.java[Java]	题解	Medium
282	397. Integer Replacement	{source_base_url}/_0397_IntegerReplacement.java[Java]	题解	Medium
283	398. Random Pick Index	{source_base_url}/_0398_RandomPickIndex.java[Java]	题解	Medium
284	399. Evaluate Division	{source_base_url}/_0399_EvaluateDivision.java[Java]	题解	Medium
285	400. Nth Digit	{source_base_url}/_0400_NthDigit.java[Java]	题解	Medium
286	401. Binary Watch	{source_base_url}/_0401_BinaryWatch.java[Java]	题解	Easy
287	402. Remove K Digits	{source_base_url}/_0402_RemoveKDigits.java[Java]	题解	Medium
288	404. Sum of Left Leaves	{source_base_url}/_0404_SumOfLeftLeaves.java[Java]	题解	Easy
289	405. Convert a Number to Hexadecimal	{source_base_url}/_0405_ConvertANumberToHexadecimal.java[Java]	题解	Easy
290	406. Queue Reconstruction by Height	{source_base_url}/_0406_QueueReconstructionByHeight.java[Java]	题解	Medium
291	409. Longest Palindrome	{source_base_url}/_0409_LongestPalindrome.java[Java]	题解	Easy
292	412. Fizz Buzz	{source_base_url}/_0412_FizzBuzz.java[Java]	题解	Easy
293	413. Arithmetic Slices	{source_base_url}/_0413_ArithmeticSlices.java[Java]	题解	Medium
294	414. Third Maximum Number	{source_base_url}/_0414_ThirdMaximumNumber.java[Java]	题解	Easy
295	415. Add Strings	{source_base_url}/_0415_AddStrings.java[Java]	题解	Easy
296	416. Partition Equal Subset Sum	{source_base_url}/_0416_PartitionEqualSubsetSum.java[Java]	题解	Medium
297	417. Pacific Atlantic Water Flow	{source_base_url}/_0417_PacificAtlanticWaterFlow.java[Java]	题解	Medium
298	419. Battleships in a Board	{source_base_url}/_0419_BattleshipsInABoard.java[Java]	题解	Medium
299	421. Maximum XOR of Two Numbers in an Array	{source_base_url}/_0421_MaximumXOROfTwoNumbersInAnArray.java[Java]	题解	Medium
300	423. Reconstruct Original Digits from English	{source_base_url}/_0423_ReconstructOriginalDigitsFromEnglish.java[Java]	题解	Medium
301	424. Longest Repeating Character Replacement	{source_base_url}/_0424_LongestRepeatingCharacterReplacement.java[Java]	题解	Medium
302	427. Construct Quad Tree	{source_base_url}/_0427_ConstructQuadTree.java[Java]	题解	Medium
303	429. N-ary Tree Level Order Traversal	{source_base_url}/_0429_NAryTreeLevelOrderTraversal.java[Java]	题解	Medium	广度优先
304	430. Flatten a Multilevel Doubly Linked List	{source_base_url}/_0430_FlattenAMultilevelDoublyLinkedList.java[Java]	题解	Medium
305	433. Minimum Genetic Mutation	{source_base_url}/_0433_MinimumGeneticMutation.java[Java]	题解	Medium
306	434. Number of Segments in a String	{source_base_url}/_0434_NumberOfSegmentsInAString.java[Java]	题解	Easy
307	435. Non-overlapping Intervals	{source_base_url}/_0435_NonOverlappingIntervals.java[Java]	题解	Medium
308	436. Find Right Interval	{source_base_url}/_0436_FindRightInterval.java[Java]	题解	Medium
309	437. Path Sum III	{source_base_url}/_0437_PathSumIII.java[Java]	题解	Medium	前缀和解法还需要多思考！
310	438. Find All Anagrams in a String	{source_base_url}/_0438_FindAllAnagramsInAString.java[Java]	题解	Medium
311	441. Arranging Coins	{source_base_url}/_0441_ArrangingCoins.java[Java]	题解	Easy
312	442. Find All Duplicates in an Array	{source_base_url}/_0442_FindAllDuplicatesInAnArray.java[Java]	题解	Medium
313	443. String Compression	{source_base_url}/_0443_StringCompression.java[Java]	题解	Easy
314	445. Add Two Numbers II	{source_base_url}/_0445_AddTwoNumbersII.java[Java]	题解	Medium
315	447. Number of Boomerangs	{source_base_url}/_0447_NumberOfBoomerangs.java[Java]	题解	Easy
316	448. Find All Numbers Disappeared in an Array	{source_base_url}/_0448_FindAllNumbersDisappearedInAnArray.java[Java]	题解	Easy
317	450. Delete Node in a BST	{source_base_url}/_0450_DeleteNodeInABST.java[Java]	题解	Medium
318	451. Sort Characters By Frequency	{source_base_url}/_0451_SortCharactersByFrequency.java[Java]	题解	Medium
319	452. Minimum Number of Arrows to Burst Balloons	{source_base_url}/_0452_MinimumNumberOfArrowsToBurstBalloons.java[Java]	题解	Medium
320	453. Minimum Moves to Equal Array Elements	{source_base_url}/_0453_MinimumMovesToEqualArrayElements.java[Java]	题解	Medium
321	454. 4Sum II	{source_base_url}/_0454_4SumII.java[Java]	题解	Medium
322	455. Assign Cookies	{source_base_url}/_0455_AssignCookies.java[Java]	题解	Easy
323	456. 132 Pattern	{source_base_url}/_0456_132Pattern.java[Java]	题解	Medium
324	457. Circular Array Loop	{source_base_url}/_0457_CircularArrayLoop.java[Java]	题解	Medium
325	459. Repeated Substring Pattern	{source_base_url}/_0459_RepeatedSubstringPattern.java[Java]	题解	Easy
326	460. LFU Cache	{source_base_url}/_0460_LFUCache.java[Java]	题解	Hard
327	461. Hamming Distance	{source_base_url}/_0461_HammingDistance.java[Java]	题解	Easy
328	462. Minimum Moves to Equal Array Elements II	{source_base_url}/_0462_MinimumMovesToEqualArrayElementsII.java[Java]	题解	Medium	快速选择
329	463. Island Perimeter	{source_base_url}/_0463_IslandPerimeter.java[Java]	题解	Easy
330	468. Validate IP Address	{source_base_url}/_0468_ValidateIPAddress.java[Java]	题解	Medium
331	470. Implement Rand10() Using Rand7()	{source_base_url}/_0470_ImplementRand10UsingRand7.java[Java]	题解	Medium
332	473. Matchsticks to Square	{source_base_url}/_0473_MatchsticksToSquare.java[Java]	题解	Medium
333	474. Ones and Zeroes	{source_base_url}/_0474_OnesAndZeroes.java[Java]	题解	Medium
334	475. Heaters	{source_base_url}/_0475_Heaters.java[Java]	题解	Easy
335	476. Number Complement	{source_base_url}/_0476_NumberComplement.java[Java]	题解	Easy
336	477. Total Hamming Distance	{source_base_url}/_0477_TotalHammingDistance.java[Java]	题解	Medium
337	478. Generate Random Point in a Circle	{source_base_url}/_0478_GenerateRandomPointInACircle.java[Java]	题解	Medium
338	480. Sliding Window Median	{source_base_url}/_0480_SlidingWindowMedian.java[Java]	题解	Hard
339	481. Magical String	{source_base_url}/_0481_MagicalString.java[Java]	题解	Medium
340	482. License Key Formatting	{source_base_url}/_0482_LicenseKeyFormatting.java[Java]	题解	Easy
341	494. Target Sum	{source_base_url}/_0494_TargetSum.java[Java]	题解	Medium
342	496. Next Greater Element I	{source_base_url}/_0496_NextGreaterElementI.java[Java]	题解	Easy
343	500. Keyboard Row	{source_base_url}/_0500_KeyboardRow.java[Java]	题解	Easy
344	501. Find Mode in Binary Search Tree	{source_base_url}/_0501_FindModeInBinarySearchTree.java[Java]	题解	Easy
345	502. IPO	{source_base_url}/_0502_IPO.java[Java]	题解	Hard
346	503. Next Greater Element II	{source_base_url}/_0503_NextGreaterElementII.java[Java]	题解	Medium
347	504. Base 7	{source_base_url}/_0504_Base7.java[Java]	题解	Easy
348	506. Relative Ranks	{source_base_url}/_0506_RelativeRanks.java[Java]	题解	Easy
349	507. Perfect Number	{source_base_url}/_0507_PerfectNumber.java[Java]	题解	Easy
350	508. Most Frequent Subtree Sum	{source_base_url}/_0508_MostFrequentSubtreeSum.java[Java]	题解	Medium
351	509. Fibonacci Number	{source_base_url}/_0509_FibonacciNumber.java[Java]	题解	Easy
352	513. Find Bottom Left Tree Value	{source_base_url}/_0513_FindBottomLeftTreeValue.java[Java]	题解	Medium
353	515. Find Largest Value in Each Tree Row	{source_base_url}/_0515_FindLargestValueInEachTreeRow.java[Java]	题解	Medium	层序遍历
354	516. Longest Palindromic Subsequence	{source_base_url}/_0516_LongestPalindromicSubsequence.java[Java]	题解	Medium
355	517. Super Washing Machines	{source_base_url}/_0517_SuperWashingMachines.java[Java]	题解	Hard
356	518. 零钱兑换 II	{source_base_url}/_0518_CoinChangeIi.java[Java]	题解	Medium
357	519. Random Flip Matrix	{source_base_url}/_0519_RandomFlipMatrix.java[Java]	题解	Medium
358	520. Detect Capital	{source_base_url}/_0520_DetectCapital.java[Java]	题解	Easy
359	521. Longest Uncommon Subsequence I	{source_base_url}/_0521_LongestUncommonSubsequenceI.java[Java]	题解	Easy
360	522. Longest Uncommon Subsequence II	{source_base_url}/_0522_LongestUncommonSubsequenceII.java[Java]	题解	Medium
361	523. Continuous Subarray Sum	{source_base_url}/_0523_ContinuousSubarraySum.java[Java]	题解	Medium	前缀和
362	524. Longest Word in Dictionary through Deleting	{source_base_url}/_0524_LongestWordInDictionaryThroughDeleting.java[Java]	题解	Medium
363	525. Contiguous Array	{source_base_url}/_0525_ContiguousArray.java[Java]	题解	Medium
364	526. Beautiful Arrangement	{source_base_url}/_0526_BeautifulArrangement.java[Java]	题解	Medium
365	528. Random Pick with Weight	{source_base_url}/_0528_RandomPickWithWeight.java[Java]	题解	Medium
366	529. Minesweeper	{source_base_url}/_0529_Minesweeper.java[Java]	题解	Medium
367	530. Minimum Absolute Difference in BST	{source_base_url}/_0530_MinimumAbsoluteDifferenceInBST.java[Java]	题解	Easy
368	532. K-diff Pairs in an Array	{source_base_url}/_0532_KDiffPairsInAnArray.java[Java]	题解	Easy
369	535. Encode and Decode TinyURL	{source_base_url}/_0535_EncodeAndDecodeTinyURL.java[Java]	题解	Medium
370	537. Complex Number Multiplication	{source_base_url}/_0537_ComplexNumberMultiplication.java[Java]	题解	Medium
371	538. Convert BST to Greater Tree	{source_base_url}/_0538_ConvertBSTToGreaterTree.java[Java]	题解	Easy
372	539. Minimum Time Difference	{source_base_url}/_0539_MinimumTimeDifference.java[Java]	题解	Medium
373	540. Single Element in a Sorted Array	{source_base_url}/_0540_SingleElementInASortedArray.java[Java]	题解	Medium
374	541. Reverse String II	{source_base_url}/_0541_ReverseStringII.java[Java]	题解	Easy
375	542. 01 Matrix	{source_base_url}/_0542_01Matrix.java[Java]	题解	Medium
376	543. Diameter of Binary Tree	{source_base_url}/_0543_DiameterOfBinaryTree.java[Java]	题解	Easy
377	547. 省份数量	{source_base_url}/_0547_NumberOfProvinces.java[Java]	题解	Medium
378	551. Student Attendance Record I	{source_base_url}/_0551_StudentAttendanceRecordI.java[Java]	题解	Easy
379	552. Student Attendance Record II	{source_base_url}/_0552_StudentAttendanceRecordII.java[Java]	题解	Hard
380	553. Optimal Division	{source_base_url}/_0553_OptimalDivision.java[Java]	题解	Medium
381	554. Brick Wall	{source_base_url}/_0554_BrickWall.java[Java]	题解	Medium
382	556. Next Greater Element III	{source_base_url}/_0556_NextGreaterElementIII.java[Java]	题解	Medium
383	557. Reverse Words in a String III	{source_base_url}/_0557_ReverseWordsInAStringIII.java[Java]	题解	Easy
384	558. 四叉树交集	{source_base_url}/_0558_LogicalOrOfTwoBinaryGridsRepresentedAsQuadTrees.java[Java]	题解	Easy
385	559. Maximum Depth of N-ary Tree	{source_base_url}/_0559_MaximumDepthOfNAryTree.java[Java]	题解	Easy
386	560. Subarray Sum Equals K	{source_base_url}/_0560_SubarraySumEqualsK.java[Java]	题解	Medium	前缀和
387	561. 数组拆分	{source_base_url}/_0561_ArrayPartition.java[Java]	题解	Easy
388	563. Binary Tree Tilt	{source_base_url}/_0563_BinaryTreeTilt.java[Java]	题解	Easy
389	564. Find the Closest Palindrome	{source_base_url}/_0564_FindTheClosestPalindrome.java[Java]	题解	Hard
390	565. Array Nesting	{source_base_url}/_0565_ArrayNesting.java[Java]	题解	Medium
391	566. Reshape the Matrix	{source_base_url}/_0566_ReshapeTheMatrix.java[Java]	题解	Easy
392	567. Permutation in String	{source_base_url}/_0567_PermutationInString.java[Java]	题解	Medium
393	572. Subtree of Another Tree	{source_base_url}/_0572_SubtreeOfAnotherTree.java[Java]	题解	Easy
394	575. Distribute Candies	{source_base_url}/_0575_DistributeCandies.java[Java]	题解	Easy
395	576. Out of Boundary Paths	{source_base_url}/_0576_OutOfBoundaryPaths.java[Java]	题解	Medium
396	581. Shortest Unsorted Continuous Subarray	{source_base_url}/_0581_ShortestUnsortedContinuousSubarray.java[Java]	题解	Easy
397	583. Delete Operation for Two Strings	{source_base_url}/_0583_DeleteOperationForTwoStrings.java[Java]	题解	Medium
398	587. Erect the Fence	{source_base_url}/_0587_ErectTheFence.java[Java]	题解	Hard
399	589. N-ary Tree Preorder Traversal	{source_base_url}/_0589_NAryTreePreorderTraversal.java[Java]	题解	Easy
400	590. N-ary Tree Postorder Traversal	{source_base_url}/_0590_NAryTreePostorderTraversal.java[Java]	题解	Easy
401	591. Tag Validator	{source_base_url}/_0591_TagValidator.java[Java]	题解	Hard
402	592. Fraction Addition and Subtraction	{source_base_url}/_0592_FractionAdditionAndSubtraction.java[Java]	题解	Medium
403	593. Valid Square	{source_base_url}/_0593_ValidSquare.java[Java]	题解	Medium
404	594. Longest Harmonious Subsequence	{source_base_url}/_0594_LongestHarmoniousSubsequence.java[Java]	题解	Easy
405	598. Range Addition II	{source_base_url}/_0598_RangeAdditionII.java[Java]	题解	Easy
406	599. Minimum Index Sum of Two Lists	{source_base_url}/_0599_MinimumIndexSumOfTwoLists.java[Java]	题解	Easy
407	600. Non-negative Integers without Consecutive Ones	{source_base_url}/_0600_NonNegativeIntegersWithoutConsecutiveOnes.java[Java]	题解	Hard
408	605. Can Place Flowers	{source_base_url}/_0605_CanPlaceFlowers.java[Java]	题解	Easy
409	606. Construct String from Binary Tree	{source_base_url}/_0606_ConstructStringFromBinaryTree.java[Java]	题解	Easy
410	609. Find Duplicate File in System	{source_base_url}/_0609_FindDuplicateFileInSystem.java[Java]	题解	Medium
411	611. Valid Triangle Number	{source_base_url}/_0611_ValidTriangleNumber.java[Java]	题解	Medium
412	617. Merge Two Binary Trees	{source_base_url}/_0617_MergeTwoBinaryTrees.java[Java]	题解	Easy
413	621. Task Scheduler	{source_base_url}/_0621_TaskScheduler.java[Java]	题解	Medium
414	622. Design Circular Queue	{source_base_url}/_0622_DesignCircularQueue.java[Java]	题解	Medium
415	623. Add One Row to Tree	{source_base_url}/_0623_AddOneRowToTree.java[Java]	题解	Medium
416	628. Maximum Product of Three Numbers	{source_base_url}/_0628_MaximumProductOfThreeNumbers.java[Java]	题解	Easy
417	629. K Inverse Pairs Array	{source_base_url}/_0629_KInversePairsArray.java[Java]	题解	Hard
418	630. Course Schedule III	{source_base_url}/_0630_CourseScheduleIII.java[Java]	题解	Hard
419	632. Smallest Range Covering Elements from K Lists	{source_base_url}/_0632_SmallestRangeCoveringElementsFromKLists.java[Java]	题解	Hard
420	633. Sum of Square Numbers	{source_base_url}/_0633_SumOfSquareNumbers.java[Java]	题解	Easy
421	636. Exclusive Time of Functions	{source_base_url}/_0636_ExclusiveTimeOfFunctions.java[Java]	题解	Medium
422	637. Average of Levels in Binary Tree	{source_base_url}/_0637_AverageOfLevelsInBinaryTree.java[Java]	题解	Easy
423	638. Shopping Offers	{source_base_url}/_0638_ShoppingOffers.java[Java]	题解	Medium
424	639. Decode Ways II	{source_base_url}/_0639_DecodeWaysII.java[Java]	题解	Hard
425	643. Maximum Average Subarray I	{source_base_url}/_0643_MaximumAverageSubarrayI.java[Java]	题解	Easy
426	645. Set Mismatch	{source_base_url}/_0645_SetMismatch.java[Java]	题解	Easy
427	646. Maximum Length of Pair Chain	{source_base_url}/_0646_MaximumLengthOfPairChain.java[Java]	题解	Medium
428	647. Palindromic Substrings	{source_base_url}/_0647_PalindromicSubstrings.java[Java]	题解	Medium
429	648. Replace Words	{source_base_url}/_0648_ReplaceWords.java[Java]	题解	Medium
430	649. Dota2 Senate	{source_base_url}/_0649_Dota2Senate.java[Java]	题解	Medium
431	650. 2 Keys Keyboard	{source_base_url}/_0650_2KeysKeyboard.java[Java]	题解	Medium
432	652. Find Duplicate Subtrees	{source_base_url}/_0652_FindDuplicateSubtrees.java[Java]	题解	Medium
433	653. Two Sum IV - Input is a BST	{source_base_url}/_0653_TwoSumIVInputIsABST.java[Java]	题解	Easy
434	654. Maximum Binary Tree	{source_base_url}/_0654_MaximumBinaryTree.java[Java]	题解	Medium
435	655. Print Binary Tree	{source_base_url}/_0655_PrintBinaryTree.java[Java]	题解	Medium
436	657. Robot Return to Origin	{source_base_url}/_0657_RobotReturnToOrigin.java[Java]	题解	Easy
437	658. Find K Closest Elements	{source_base_url}/_0658_FindKClosestElements.java[Java]	题解	Medium
438	659. Split Array into Consecutive Subsequences	{source_base_url}/_0659_SplitArrayIntoConsecutiveSubsequences.java[Java]	题解	Medium
439	661. Image Smoother	{source_base_url}/_0661_ImageSmoother.java[Java]	题解	Easy
440	662. Maximum Width of Binary Tree	{source_base_url}/_0662_MaximumWidthOfBinaryTree.java[Java]	题解	Medium
441	664. Strange Printer	{source_base_url}/_0664_StrangePrinter.java[Java]	题解	Hard
442	665. Non-decreasing Array	{source_base_url}/_0665_NonDecreasingArray.java[Java]	题解	Easy
443	667. Beautiful Arrangement II	{source_base_url}/_0667_BeautifulArrangementII.java[Java]	题解	Medium
444	668. Kth Smallest Number in Multiplication Table	{source_base_url}/_0668_KthSmallestNumberInMultiplicationTable.java[Java]	题解	Hard
445	669. Trim a Binary Search Tree	{source_base_url}/_0669_TrimABinarySearchTree.java[Java]	题解	Easy
446	670. Maximum Swap	{source_base_url}/_0670_MaximumSwap.java[Java]	题解	Medium
447	671. Second Minimum Node In a Binary Tree	{source_base_url}/_0671_SecondMinimumNodeInABinaryTree.java[Java]	题解	Easy
448	672. Bulb Switcher II	{source_base_url}/_0672_BulbSwitcherII.java[Java]	题解	Medium
449	673. Number of Longest Increasing Subsequence	{source_base_url}/_0673_NumberOfLongestIncreasingSubsequence.java[Java]	题解	Medium
450	674. Longest Continuous Increasing Subsequence	{source_base_url}/_0674_LongestContinuousIncreasingSubsequence.java[Java]	题解	Easy
451	675. Cut Off Trees for Golf Event	{source_base_url}/_0675_CutOffTreesForGolfEvent.java[Java]	题解	Hard
452	676. Implement Magic Dictionary	{source_base_url}/_0676_ImplementMagicDictionary.java[Java]	题解	Medium
453	677. Map Sum Pairs	{source_base_url}/_0677_MapSumPairs.java[Java]	题解	Medium
454	678. Valid Parenthesis String	{source_base_url}/_0678_ValidParenthesisString.java[Java]	题解	Medium
455	679. 24 Game	{source_base_url}/_0679_24Game.java[Java]	题解	Hard
456	680. Valid Palindrome II	{source_base_url}/_0680_ValidPalindromeII.java[Java]	题解	Easy
457	682. Baseball Game	{source_base_url}/_0682_BaseballGame.java[Java]	题解	Easy
458	684. Redundant Connection	{source_base_url}/_0684_RedundantConnection.java[Java]	题解	Medium
459	685. Redundant Connection II	{source_base_url}/_0685_RedundantConnectionII.java[Java]	题解	Hard
460	686. Repeated String Match	{source_base_url}/_0686_RepeatedStringMatch.java[Java]	题解	Easy
461	687. Longest Univalue Path	{source_base_url}/_0687_LongestUnivaluePath.java[Java]	题解	Easy
462	688. Knight Probability in Chessboard	{source_base_url}/_0688_KnightProbabilityInChessboard.java[Java]	题解	Medium
463	690. Employee Importance	{source_base_url}/_0690_EmployeeImportance.java[Java]	题解	Easy
464	692. Top K Frequent Words	{source_base_url}/_0692_TopKFrequentWords.java[Java]	题解	Medium
465	693. Binary Number with Alternating Bits	{source_base_url}/_0693_BinaryNumberWithAlternatingBits.java[Java]	题解	Easy
466	695. Max Area of Island	{source_base_url}/_0695_MaxAreaOfIsland.java[Java]	题解	Medium
467	696. Count Binary Substrings	{source_base_url}/_0696_CountBinarySubstrings.java[Java]	题解	Easy
468	697. Degree of an Array	{source_base_url}/_0697_DegreeOfAnArray.java[Java]	题解	Easy
469	698. Partition to K Equal Sum Subsets	{source_base_url}/_0698_PartitionToKEqualSumSubsets.java[Java]	题解	Medium
470	700. Search in a Binary Search Tree	{source_base_url}/_0700_SearchInABinarySearchTree.java[Java]	题解	Easy
471	701. Insert into a Binary Search Tree	{source_base_url}/_0701_InsertIntoABinarySearchTree.java[Java]	题解	Medium
472	703. Kth Largest Element in a Stream	{source_base_url}/_0703_KthLargestElementInAStream.java[Java]	题解	Easy
473	704. Binary Search	{source_base_url}/_0704_BinarySearch.java[Java]	题解	Easy
474	705. Design HashSet	{source_base_url}/_0705_DesignHashSet.java[Java]	题解	Easy
475	706. Design HashMap	{source_base_url}/_0706_DesignHashMap.java[Java]	题解	Easy
476	707. Design Linked List	{source_base_url}/_0707_DesignLinkedList.java[Java]	题解	Medium
477	709. To Lower Case	{source_base_url}/_0709_ToLowerCase.java[Java]	题解	Easy
478	710. Random Pick with Blacklist	{source_base_url}/_0710_RandomPickWithBlacklist.java[Java]	题解	Hard
479	712. Minimum ASCII Delete Sum for Two Strings	{source_base_url}/_0712_MinimumASCIIDeleteSumForTwoStrings.java[Java]	题解	Medium
480	713. Subarray Product Less Than K	{source_base_url}/_0713_SubarrayProductLessThanK.java[Java]	题解	Medium	滑动窗口
481	714. Best Time to Buy and Sell Stock with Transaction Fee	{source_base_url}/_0714_BestTimeToBuyAndSellStockWithTransactionFee.java[Java]	题解	Medium
482	717. 1-bit and 2-bit Characters	{source_base_url}/_0717_1BitAnd2BitCharacters.java[Java]	题解	Easy
483	718. Maximum Length of Repeated Subarray	{source_base_url}/_0718_MaximumLengthOfRepeatedSubarray.java[Java]	题解	Medium
484	720. Longest Word in Dictionary	{source_base_url}/_0720_LongestWordInDictionary.java[Java]	题解	Easy
485	721. Accounts Merge	{source_base_url}/_0721_AccountsMerge.java[Java]	题解	Medium
486	722. Remove Comments	{source_base_url}/_0722_RemoveComments.java[Java]	题解	Medium
487	724. Find Pivot Index	{source_base_url}/_0724_FindPivotIndex.java[Java]	题解	Easy
488	725. Split Linked List in Parts	{source_base_url}/_0725_SplitLinkedListInParts.java[Java]	题解	Medium
489	728. Self Dividing Numbers	{source_base_url}/_0728_SelfDividingNumbers.java[Java]	题解	Easy
490	729. My Calendar I	{source_base_url}/_0729_MyCalendarI.java[Java]	题解	Medium
491	731. My Calendar II	{source_base_url}/_0731_MyCalendarII.java[Java]	题解	Medium
492	733. Flood Fill	{source_base_url}/_0733_FloodFill.java[Java]	题解	Easy
493	735. Asteroid Collision	{source_base_url}/_0735_AsteroidCollision.java[Java]	题解	Medium
494	738. Monotone Increasing Digits	{source_base_url}/_0738_MonotoneIncreasingDigits.java[Java]	题解	Medium
495	739. Daily Temperatures	{source_base_url}/_0739_DailyTemperatures.java[Java]	题解	Medium
496	740. Delete and Earn	{source_base_url}/_0740_DeleteAndEarn.java[Java]	题解	Medium
497	743. Network Delay Time	{source_base_url}/_0743_NetworkDelayTime.java[Java]	题解	Medium
498	744. Find Smallest Letter Greater Than Target	{source_base_url}/_0744_FindSmallestLetterGreaterThanTarget.java[Java]	题解	Easy
499	745. Prefix and Suffix Search	{source_base_url}/_0745_PrefixAndSuffixSearch.java[Java]	题解	Hard
500	746. Min Cost Climbing Stairs	{source_base_url}/_0746_MinCostClimbingStairs.java[Java]	题解	Easy
501	747. Largest Number At Least Twice of Others	{source_base_url}/_0747_LargestNumberAtLeastTwiceOfOthers.java[Java]	题解	Easy
502	748. Shortest Completing Word	{source_base_url}/_0748_ShortestCompletingWord.java[Java]	题解	Easy
503	752. Open the Lock	{source_base_url}/_0752_OpenTheLock.java[Java]	题解	Medium
504	762. Prime Number of Set Bits in Binary Representation	{source_base_url}/_0762_PrimeNumberOfSetBitsInBinaryRepresentation.java[Java]	题解	Easy
505	763. Partition Labels	{source_base_url}/_0763_PartitionLabels.java[Java]	题解	Medium
506	766. Toeplitz Matrix	{source_base_url}/_0766_ToeplitzMatrix.java[Java]	题解	Easy
507	767. Reorganize String	{source_base_url}/_0767_ReorganizeString.java[Java]	题解	Medium
508	768. Max Chunks To Make Sorted II	{source_base_url}/_0768_MaxChunksToMakeSortedII.java[Java]	题解	Hard
509	769. Max Chunks To Make Sorted	{source_base_url}/_0769_MaxChunksToMakeSorted.java[Java]	题解	Medium
510	771. Jewels and Stones	{source_base_url}/_0771_JewelsAndStones.java[Java]	题解	Easy
511	775. Global and Local Inversions	{source_base_url}/_0775_GlobalAndLocalInversions.java[Java]	题解	Medium
512	777. Swap Adjacent in LR String	{source_base_url}/_0777_SwapAdjacentInLRString.java[Java]	题解	Medium
513	779. K-th Symbol in Grammar	{source_base_url}/_0779_KThSymbolInGrammar.java[Java]	题解	Medium
514	781. Rabbits in Forest	{source_base_url}/_0781_RabbitsInForest.java[Java]	题解	Medium
515	784. Letter Case Permutation	{source_base_url}/_0784_LetterCasePermutation.java[Java]	题解	Easy
516	785. Is Graph Bipartite?	{source_base_url}/_0785_IsGraphBipartite.java[Java]	题解	Medium
517	786. K-th Smallest Prime Fraction	{source_base_url}/_0786_KThSmallestPrimeFraction.java[Java]	题解	Hard
518	787. Cheapest Flights Within K Stops	{source_base_url}/_0787_CheapestFlightsWithinKStops.java[Java]	题解	Medium
519	788. Rotated Digits	{source_base_url}/_0788_RotatedDigits.java[Java]	题解	Easy
520	789. Escape The Ghosts	{source_base_url}/_0789_EscapeTheGhosts.java[Java]	题解	Medium
521	790. Domino and Tromino Tiling	{source_base_url}/_0790_DominoAndTrominoTiling.java[Java]	题解	Medium
522	791. Custom Sort String	{source_base_url}/_0791_CustomSortString.java[Java]	题解	Medium
523	792. Number of Matching Subsequences	{source_base_url}/_0792_NumberOfMatchingSubsequences.java[Java]	题解	Medium
524	794. Valid Tic-Tac-Toe State	{source_base_url}/_0794_ValidTicTacToeState.java[Java]	题解	Medium
525	795. Number of Subarrays with Bounded Maximum	{source_base_url}/_0795_NumberOfSubarraysWithBoundedMaximum.java[Java]	题解	Medium
526	796. Rotate String	{source_base_url}/_0796_RotateString.java[Java]	题解	Easy
527	797. All Paths From Source to Target	{source_base_url}/_0797_AllPathsFromSourceToTarget.java[Java]	题解	Medium
528	841. Keys and Rooms	{source_base_url}/_0841_KeysAndRooms.java[Java]	题解	Medium
529	865. Smallest Subtree with all the Deepest Nodes	{source_base_url}/_0865_SmallestSubtreeWithAllTheDeepestNodes.java[Java]	题解	Medium
530	869. Reordered Power of 2	{source_base_url}/_0869_ReorderedPowerOf2.java[Java]	题解	Medium
531	870. Advantage Shuffle	{source_base_url}/_0870_AdvantageShuffle.java[Java]	题解	Medium
532	875. Koko Eating Bananas	{source_base_url}/_0875_KokoEatingBananas.java[Java]	题解	Medium	二分查找
533	876. Middle of the Linked List	{source_base_url}/_0876_MiddleOfTheLinkedList.java[Java]	题解	Easy
534	881. Boats to Save People	{source_base_url}/_0881_BoatsToSavePeople.java[Java]	题解	Medium
535	890. Find and Replace Pattern	{source_base_url}/_0890_FindAndReplacePattern.java[Java]	题解	Medium
536	892. Surface Area of 3D Shapes	{source_base_url}/_0892_SurfaceAreaOf3DShapes.java[Java]	题解	Easy
537	900. RLE Iterator	{source_base_url}/_0900_RLEIterator.java[Java]	题解	Medium
538	904. Fruit Into Baskets	{source_base_url}/_0904_FruitIntoBaskets.java[Java]	题解	Medium
539	909. Snakes and Ladders	{source_base_url}/_0909_SnakesAndLadders.java[Java]	题解	Medium
540	912. Sort an Array	{source_base_url}/_0912_SortAnArray.java[Java]	题解	Medium	归并，快排
541	915. Partition Array into Disjoint Intervals	{source_base_url}/_0915_PartitionArrayIntoDisjointIntervals.java[Java]	题解	Medium
542	918. Maximum Sum Circular Subarray	{source_base_url}/_0918_MaximumSumCircularSubarray.java[Java]	题解	Medium
543	926. Flip String to Monotone Increasing	{source_base_url}/_0926_FlipStringToMonotoneIncreasing.java[Java]	题解	Medium
544	931. Minimum Falling Path Sum	{source_base_url}/_0931_MinimumFallingPathSum.java[Java]	题解	Medium
545	946. Validate Stack Sequences	{source_base_url}/_0946_ValidateStackSequences.java[Java]	题解	Medium
546	980. Unique Paths III	{source_base_url}/_0980_UniquePathsIII.java[Java]	题解	Hard
547	986. Interval List Intersections	{source_base_url}/_0986_IntervalListIntersections.java[Java]	题解	Medium
548	990. Satisfiability of Equality Equations	{source_base_url}/_0990_SatisfiabilityOfEqualityEquations.java[Java]	题解	Medium
549	992. Subarrays with K Different Integers	{source_base_url}/_0992_SubarraysWithKDifferentIntegers.java[Java]	题解	Hard
550	994. Rotting Oranges	{source_base_url}/_0994_RottingOranges.java[Java]	题解	Easy
551	1006. Clumsy Factorial	{source_base_url}/_1006_ClumsyFactorial.java[Java]	题解	Medium
552	1007. Minimum Domino Rotations For Equal Row	{source_base_url}/_1007_MinimumDominoRotationsForEqualRow.java[Java]	题解	Medium
553	1011. Capacity To Ship Packages Within D Days	{source_base_url}/_1011_CapacityToShipPackagesWithinDDays.java[Java]	题解	Medium
554	1020. Number of Enclaves	{source_base_url}/_1020_NumberOfEnclaves.java[Java]	题解	Medium
555	1022. Sum of Root To Leaf Binary Numbers	{source_base_url}/_1022_SumOfRootToLeafBinaryNumbers.java[Java]	题解	Easy
556	1023. Camelcase Matching	{source_base_url}/_1023_CamelcaseMatching.java[Java]	题解	Medium
557	1033. Moving Stones Until Consecutive	{source_base_url}/_1033_MovingStonesUntilConsecutive.java[Java]	题解	Easy
558	1041. Robot Bounded In Circle	{source_base_url}/_1041_RobotBoundedInCircle.java[Java]	题解	Medium
559	1047. Remove All Adjacent Duplicates In String	{source_base_url}/_1047_RemoveAllAdjacentDuplicatesInString.java[Java]	题解	Easy
560	1049. Last Stone Weight II	{source_base_url}/_1049_LastStoneWeightII.java[Java]	题解	Medium
561	1052. Grumpy Bookstore Owner	{source_base_url}/_1052_GrumpyBookstoreOwner.java[Java]	题解	Medium
562	1081. Smallest Subsequence of Distinct Characters	{source_base_url}/_1081_SmallestSubsequenceOfDistinctCharacters.java[Java]	题解	Medium
563	1090. Largest Values From Labels	{source_base_url}/_1090_LargestValuesFromLabels.java[Java]	题解	Medium	排序规则跟 179、870 题类似：保存下标，使用其他数组的值对下标数组进行排序。
564	1094. Car Pooling	{source_base_url}/_1094_CarPooling.java[Java]	题解	Medium
565	1104. Path In Zigzag Labelled Binary Tree	{source_base_url}/_1104_PathInZigzagLabelledBinaryTree.java[Java]	题解	Medium
566	1109. Corporate Flight Bookings	{source_base_url}/_1109_CorporateFlightBookings.java[Java]	题解	Medium
567	1110. Delete Nodes And Return Forest	{source_base_url}/_1110_DeleteNodesAndReturnForest.java[Java]	题解	Medium
568	1137. N-th Tribonacci Number	{source_base_url}/_1137_NThTribonacciNumber.java[Java]	题解	Easy
569	1143. Longest Common Subsequence	{source_base_url}/_1143_LongestCommonSubsequence.java[Java]	题解	Medium
570	1171. Remove Zero Sum Consecutive Nodes from Linked List	{source_base_url}/_1171_RemoveZeroSumConsecutiveNodesFromLinkedList.java[Java]	题解	Medium
571	1189. Maximum Number of Balloons	{source_base_url}/_1189_MaximumNumberOfBalloons.java[Java]	题解	Easy
572	1209. Remove All Adjacent Duplicates in String II	{source_base_url}/_1209_RemoveAllAdjacentDuplicatesInStringII.java[Java]	题解	Medium
573	1217. 玩筹码	{source_base_url}/_1217_MinimumCostToMoveChipsToTheSamePosition.java[Java]	题解	Easy
574	1253. Reconstruct a 2-Row Binary Matrix	{source_base_url}/_1253_ReconstructA2RowBinaryMatrix.java[Java]	题解	Medium
575	1289. Minimum Falling Path Sum II	{source_base_url}/_1289_MinimumFallingPathSumII.java[Java]	题解	Hard
576	1325. Delete Leaves With a Given Value	{source_base_url}/_1325_DeleteLeavesWithAGivenValue.java[Java]	题解	Medium
577	1349. Maximum Students Taking Exam	{source_base_url}/_1349_MaximumStudentsTakingExam.java[Java]	题解	Hard
578	1362. Closest Divisors	{source_base_url}/_1362_ClosestDivisors.java[Java]	题解	Medium
579	1382. Balance a Binary Search Tree	{source_base_url}/_1382_BalanceABinarySearchTree.java[Java]	题解	Medium
580	1387. Sort Integers by The Power Value	{source_base_url}/_1387_SortIntegersByThePowerValue.java[Java]	题解	Medium
581	1400. Construct K Palindrome Strings	{source_base_url}/_1400_ConstructKPalindromeStrings.java[Java]	题解	Medium
582	1410. HTML Entity Parser	{source_base_url}/_1410_HtmlEntityParser.java[Java]	题解	Medium
583	1442. Count Triplets That Can Form Two Arrays of Equal XOR	{source_base_url}/_1442_CountTripletsThatCanFormTwoArraysOfEqualXor.java[Java]	题解	Medium
584	1457. Pseudo-Palindromic Paths in a Binary Tree	{source_base_url}/_1457_PseudoPalindromicPathsInABinaryTree.java[Java]	题解	Medium
585	1480. Running Sum of 1d Array	{source_base_url}/_1480_RunningSumOf1DArray.java[Java]	题解	Easy
586	1496. Path Crossing	{source_base_url}/_1496_PathCrossing.java[Java]	题解	Easy
587	1509. Minimum Difference Between Largest and Smallest Value in Three Moves	{source_base_url}/_1509_MinimumDifferenceBetweenLargestAndSmallestValueInThreeMoves.java[Java]	题解	Medium
588	1530. Number of Good Leaf Nodes Pairs	{source_base_url}/_1530_NumberOfGoodLeafNodesPairs.java[Java]	题解	Medium
589	1557. Minimum Number of Vertices to Reach All Nodes	{source_base_url}/_1557_MinimumNumberOfVerticesToReachAllNodes.java[Java]	题解	Medium
590	1561. Maximum Number of Coins You Can Get	{source_base_url}/_1561_MaximumNumberOfCoinsYouCanGet.java[Java]	题解	Medium
591	1644. Lowest Common Ancestor of a Binary Tree II	{source_base_url}/_1644_LowestCommonAncestorOfABinaryTreeII.java[Java]	题解	Medium	树形DP套路，没有验证答案！
592	1650. Lowest Common Ancestor of a Binary Tree III	{source_base_url}/_1650_LowestCommonAncestorOfABinaryTreeIII.java[Java]	题解	Medium	链表相交
593	1700. Number of Students Unable to Eat Lunch	{source_base_url}/_1700_NumberOfStudentsUnableToEatLunch.java[Java]	题解	Easy
594	1769. Minimum Number of Operations to Move All Balls to Each Box	{source_base_url}/_1769_MinimumNumberOfOperationsToMoveAllBallsToEachBox.java[Java]	题解	Medium
595	1823. Find the Winner of the Circular Game	{source_base_url}/_1823_FindTheWinnerOfTheCircularGame.java[Java]	题解	Medium
596	1839. Longest Substring Of All Vowels in Order	{source_base_url}/_1839_LongestSubstringOfAllVowelsInOrder.java[Java]	题解	Medium
597	1864. Minimum Number of Swaps to Make the Binary String Alternating	{source_base_url}/_1864_MinimumNumberOfSwapsToMakeTheBinaryStringAlternating.java[Java]	题解	Medium
598	1905. Count Sub Islands	{source_base_url}/_1905_CountSubIslands.java[Java]	题解	Medium
599	1997. First Day Where You Have Been in All the Rooms	{source_base_url}/_1997_FirstDayWhereYouHaveBeenInAllTheRooms.java[Java]	题解	Medium