GitHub - jliu22/leetcode

Name		Name	Last commit message	Last commit date
Latest commit History 165 Commits
0.Hello-World.cc		0.Hello-World.cc
1.Two-Sum		1.Two-Sum
10.Regular-Expression-Matching		10.Regular-Expression-Matching
100.Same-Tree		100.Same-Tree
1000.Minimum-Cost-to-Merge-Stones		1000.Minimum-Cost-to-Merge-Stones
1004.Max-Consecutive-Ones-III		1004.Max-Consecutive-Ones-III
1008.Construct-Binary-Search-Tree-from-Preorder-Traversal		1008.Construct-Binary-Search-Tree-from-Preorder-Traversal
101.Symmetric-Tree		101.Symmetric-Tree
1010.Pairs-of-Songs-With-Total-Durations-Divisible-by-60		1010.Pairs-of-Songs-With-Total-Durations-Divisible-by-60
1011.Capacity-To-Ship-Packages-Within-D-Days		1011.Capacity-To-Ship-Packages-Within-D-Days
1014.Best-Sightseeing-Pair		1014.Best-Sightseeing-Pair
1019.Next-Greater-Node-In-Linked-List		1019.Next-Greater-Node-In-Linked-List
102.Binary-Tree-Level-Order-Traversal		102.Binary-Tree-Level-Order-Traversal
1022.Sum-of-Root-To-Leaf-Binary-Numbers		1022.Sum-of-Root-To-Leaf-Binary-Numbers
1024.Video-Stitching		1024.Video-Stitching
1026.Maximum-Difference-Between-Node-and-Ancestor		1026.Maximum-Difference-Between-Node-and-Ancestor
1027.Longest-Arithmetic-Sequence		1027.Longest-Arithmetic-Sequence
1028.Recover-a-Tree-From-Preorder-Traversal		1028.Recover-a-Tree-From-Preorder-Traversal
1029.Two-City-Scheduling		1029.Two-City-Scheduling
103.Binary-Tree-Zigzag-Level-Order-Traversal		103.Binary-Tree-Zigzag-Level-Order-Traversal
1031.Maximum-Sum-of-Two-Non-Overlapping-Subarrays		1031.Maximum-Sum-of-Two-Non-Overlapping-Subarrays
1035.Uncrossed-Lines		1035.Uncrossed-Lines
1038.Binary-Search-Tree-to-Greater-Sum-Tree		1038.Binary-Search-Tree-to-Greater-Sum-Tree
104.Maximum-Depth-of-Binary-Tree		104.Maximum-Depth-of-Binary-Tree
1041.Robot-Bounded-In-Circle		1041.Robot-Bounded-In-Circle
1043.Partition-Array-for-Maximum-Sum		1043.Partition-Array-for-Maximum-Sum
1046.Last-Stone-Weight		1046.Last-Stone-Weight
1049.Last-Stone-Weight-II		1049.Last-Stone-Weight-II
105.Construct-Binary-Tree-from-Preorder-and-Inorder-Traversal		105.Construct-Binary-Tree-from-Preorder-and-Inorder-Traversal
1052.Grumpy-Bookstore-Owner		1052.Grumpy-Bookstore-Owner
106.Construct-Binary-Tree-from-Inorder-and-Postorder-Traversal		106.Construct-Binary-Tree-from-Inorder-and-Postorder-Traversal
107.Binary-Tree-Level-Order-Traversal-II		107.Binary-Tree-Level-Order-Traversal-II
1071.Greatest-Common-Divisor-of-Strings		1071.Greatest-Common-Divisor-of-Strings
1074.Number-of-Submatrices-That-Sum-to-Target		1074.Number-of-Submatrices-That-Sum-to-Target
1079.Letter-Tile-Possibilities		1079.Letter-Tile-Possibilities
108.Convert-Sorted-Array-to-Binary-Search-Tree		108.Convert-Sorted-Array-to-Binary-Search-Tree
1081.Smallest-Subsequence-of-Distinct-Characters		1081.Smallest-Subsequence-of-Distinct-Characters
109.Convert-Sorted-List-to-Binary-Search-Tree		109.Convert-Sorted-List-to-Binary-Search-Tree
1091.Shortest-Path-in-Binary-Matrix		1091.Shortest-Path-in-Binary-Matrix
1092.Shortest-Common-Supersequence		1092.Shortest-Common-Supersequence
1094.Car-Pooling		1094.Car-Pooling
11.Container-With-Most-Water		11.Container-With-Most-Water
110.Balanced-Binary-Tree		110.Balanced-Binary-Tree
1105.Filling-Bookcase-Shelves		1105.Filling-Bookcase-Shelves
1106.Parsing-A-Boolean-Expression		1106.Parsing-A-Boolean-Expression
1109.Corporate-Flight-Bookings		1109.Corporate-Flight-Bookings
111.Minimum-Depth-of-Binary-Tree		111.Minimum-Depth-of-Binary-Tree
1110.Delete-Nodes-And-Return-Forest		1110.Delete-Nodes-And-Return-Forest
112.Path-Sum		112.Path-Sum
1124.Longest-Well-Performing-Interval		1124.Longest-Well-Performing-Interval
113.Path-Sum-II		113.Path-Sum-II
1130.Minimum-Cost-Tree-From-Leaf-Values		1130.Minimum-Cost-Tree-From-Leaf-Values
114.Flatten-Binary-Tree-to-Linked-List		114.Flatten-Binary-Tree-to-Linked-List
1143.Longest-Common-Subsequence		1143.Longest-Common-Subsequence
1146.Snapshot-Array		1146.Snapshot-Array
115.Distinct-Subsequences		115.Distinct-Subsequences
1155.Number-of-Dice-Rolls-With-Target-Sum		1155.Number-of-Dice-Rolls-With-Target-Sum
1156.Swap-For-Longest-Repeated-Character-Substring		1156.Swap-For-Longest-Repeated-Character-Substring
116.Populating-Next-Right-Pointers-in-Each-Node		116.Populating-Next-Right-Pointers-in-Each-Node
1161.Maximum-Level-Sum-of-a-Binary-Tree		1161.Maximum-Level-Sum-of-a-Binary-Tree
117.Populating-Next-Right-Pointers-in-Each-Node-II		117.Populating-Next-Right-Pointers-in-Each-Node-II
1171.Remove-Zero-Sum-Consecutive-Nodes-from-Linked-List		1171.Remove-Zero-Sum-Consecutive-Nodes-from-Linked-List
118.Pascal-Triangle		118.Pascal-Triangle
119.Pascal-Triangle-II		119.Pascal-Triangle-II
12.Integer-to-Roman		12.Integer-to-Roman
120.Triangle		120.Triangle
1208.Get-Equal-Substrings-Within-Budget		1208.Get-Equal-Substrings-Within-Budget
121.Best-Time-to-Buy-and-Sell-Stock		121.Best-Time-to-Buy-and-Sell-Stock
1219.Path-with-Maximum-Gold		1219.Path-with-Maximum-Gold
122.Best-Time-to-Buy-and-Sell-Stock-II		122.Best-Time-to-Buy-and-Sell-Stock-II
123.Best-Time-to-Buy-and-Sell-Stock-III		123.Best-Time-to-Buy-and-Sell-Stock-III
124.Binary-Tree-Maximum-Path-Sum		124.Binary-Tree-Maximum-Path-Sum
125.Valid-Palindrome		125.Valid-Palindrome
126.Word-Ladder-II		126.Word-Ladder-II
1262.Greatest-Sum-Divisible-by-Three		1262.Greatest-Sum-Divisible-by-Three
127.Word-Ladder		127.Word-Ladder
1277.Count-Square-Submatrices-with-All-Ones		1277.Count-Square-Submatrices-with-All-Ones
128.Longest-Consecutive-Sequence		128.Longest-Consecutive-Sequence
129.Sum-Root-to-Leaf-Numbers		129.Sum-Root-to-Leaf-Numbers
13.Roman-to-Integer		13.Roman-to-Integer
130.Surrounded-Regions		130.Surrounded-Regions
131.Palindrome-Partitioning		131.Palindrome-Partitioning
132.Palindrome-Partitioning-II		132.Palindrome-Partitioning-II
133.Clone-Graph		133.Clone-Graph
134.Gas-Station		134.Gas-Station
135.Candy		135.Candy
136.Single-Number		136.Single-Number
137.Single-Number-II		137.Single-Number-II
138.Copy-List-with-Random-Pointer		138.Copy-List-with-Random-Pointer
139.Word-Break		139.Word-Break
14.Longest-Common-Prefix		14.Longest-Common-Prefix
140.Word-Break-II		140.Word-Break-II
141.Linked-List-Cycle		141.Linked-List-Cycle
142.Linked-List-Cycle-II		142.Linked-List-Cycle-II
143.Reorder-List		143.Reorder-List
144.Binary-Tree-Preorder-Traversal		144.Binary-Tree-Preorder-Traversal
145.Binary-Tree-Postorder-Traversal		145.Binary-Tree-Postorder-Traversal
146.LRU-Cache		146.LRU-Cache
147.Insertion-Sort-List		147.Insertion-Sort-List
148.Sort-List		148.Sort-List
149.Max-Points-on-a-Line		149.Max-Points-on-a-Line
15.3Sum		15.3Sum
150.Evaluate-Reverse-Polish-Notation		150.Evaluate-Reverse-Polish-Notation
151.Reverse-Words-in-a-String		151.Reverse-Words-in-a-String
152.Maximum-Product-Subarray		152.Maximum-Product-Subarray
153.Find-Minimum-in-Rotated-Sorted-Array		153.Find-Minimum-in-Rotated-Sorted-Array
154.Find-Minimum-in-Rotated-Sorted-Array-II		154.Find-Minimum-in-Rotated-Sorted-Array-II
155.Min-Stack		155.Min-Stack
16.3Sum-Closest		16.3Sum-Closest
160.Intersection-of-Two-Linked-Lists		160.Intersection-of-Two-Linked-Lists
162.Find-Peak-Element		162.Find-Peak-Element
164.Maximum-Gap		164.Maximum-Gap
165.Compare-Version-Numbers		165.Compare-Version-Numbers
166.Fraction-to-Recurring-Decimal		166.Fraction-to-Recurring-Decimal
167.Two-Sum-II-Input-array-is-sorted		167.Two-Sum-II-Input-array-is-sorted
168.Excel-Sheet-Column-Title		168.Excel-Sheet-Column-Title
169.Majority-Element		169.Majority-Element
17.Letter-Combinations-of-a-Phone-Number		17.Letter-Combinations-of-a-Phone-Number
171.Excel-Sheet-Column-Number		171.Excel-Sheet-Column-Number
172.Factorial-Trailing-Zeroes		172.Factorial-Trailing-Zeroes
173.Binary-Search-Tree-Iterator		173.Binary-Search-Tree-Iterator
174.Dungeon-Game		174.Dungeon-Game
179.Largest-Number		179.Largest-Number
18.4Sum		18.4Sum
187.Repeated-DNA-Sequences		187.Repeated-DNA-Sequences
188.Best-Time-to-Buy-and-Sell-Stock-IV		188.Best-Time-to-Buy-and-Sell-Stock-IV
189.Rotate-Array		189.Rotate-Array
19.Remove-Nth-Node-From-End-of-List		19.Remove-Nth-Node-From-End-of-List
190.Reverse-Bits		190.Reverse-Bits
191.Number-of-1-Bits		191.Number-of-1-Bits
198.House-Robber		198.House-Robber
199.Binary-Tree-Right-Side-View		199.Binary-Tree-Right-Side-View
2.Add-Two-Numbers		2.Add-Two-Numbers
20.Valid-Parentheses		20.Valid-Parentheses
200.Number-of-Islands		200.Number-of-Islands
201.Bitwise-AND-of-Numbers-Range		201.Bitwise-AND-of-Numbers-Range
202.Happy-Number		202.Happy-Number
203.Remove-Linked-List-Elements		203.Remove-Linked-List-Elements
204.Count-Primes		204.Count-Primes
205.Isomorphic-Strings		205.Isomorphic-Strings
206.Reverse-Linked-List		206.Reverse-Linked-List
207.Course-Schedule		207.Course-Schedule
208.Implement-Trie-Prefix-Tree		208.Implement-Trie-Prefix-Tree
209.Minimum-Size-Subarray-Sum		209.Minimum-Size-Subarray-Sum
21.Merge-Two-Sorted-Lists		21.Merge-Two-Sorted-Lists
210.Course-Schedule-II		210.Course-Schedule-II
211.Add-and-Search-Word-Data-structure-design		211.Add-and-Search-Word-Data-structure-design
212.Word-Search-II		212.Word-Search-II
213.House-Robber-II		213.House-Robber-II
214.Shortest-Palindrome		214.Shortest-Palindrome
215.Kth-Largest-Element-in-an-Array		215.Kth-Largest-Element-in-an-Array
216.Combination-Sum-III		216.Combination-Sum-III
217.Contains-Duplicate		217.Contains-Duplicate
218.The-Skyline-Problem		218.The-Skyline-Problem
219.Contains-Duplicate-II		219.Contains-Duplicate-II
22.Generate-Parentheses		22.Generate-Parentheses
220.Contains-Duplicate-III		220.Contains-Duplicate-III
221.Maximal-Square		221.Maximal-Square
222.Count-Complete-Tree-Nodes		222.Count-Complete-Tree-Nodes
223.Rectangle-Area		223.Rectangle-Area
224.Basic-Calculator		224.Basic-Calculator
225.Implement-Stack-using-Queues		225.Implement-Stack-using-Queues
226.Invert-Binary-Tree		226.Invert-Binary-Tree
227.Basic-Calculator-II		227.Basic-Calculator-II
228.Summary-Ranges		228.Summary-Ranges
229.Majority-Element-II		229.Majority-Element-II
23.Merge-k-Sorted-Lists		23.Merge-k-Sorted-Lists
230.Kth-Smallest-Element-in-a-BST		230.Kth-Smallest-Element-in-a-BST
231.Power-of-Two		231.Power-of-Two
232.Implement-Queue-using-Stacks		232.Implement-Queue-using-Stacks
233.Number-of-Digit-One		233.Number-of-Digit-One
234.Palindrome-Linked-List		234.Palindrome-Linked-List
235.Lowest-Common-Ancestor-of-a-Binary-Search-Tree		235.Lowest-Common-Ancestor-of-a-Binary-Search-Tree
236.Lowest-Common-Ancestor-of-a-Binary-Tree		236.Lowest-Common-Ancestor-of-a-Binary-Tree
237.Delete-Node-in-a-Linked-List		237.Delete-Node-in-a-Linked-List
238.Product-of-Array-Except-Self		238.Product-of-Array-Except-Self
239.Sliding-Window-Maximum		239.Sliding-Window-Maximum
24.Swap-Nodes-in-Pairs		24.Swap-Nodes-in-Pairs
240.Search-a-2D-Matrix-II		240.Search-a-2D-Matrix-II
241.Different-Ways-to-Add-Parentheses		241.Different-Ways-to-Add-Parentheses
242.Valid-Anagram		242.Valid-Anagram
25.Reverse-Nodes-in-k-Group		25.Reverse-Nodes-in-k-Group
257.Binary-Tree-Paths		257.Binary-Tree-Paths
258.Add-Digits		258.Add-Digits
26.Remove-Duplicates-from-Sorted-Array		26.Remove-Duplicates-from-Sorted-Array
263.Ugly-Number		263.Ugly-Number
268.Missing-Number		268.Missing-Number
27.Remove-Element		27.Remove-Element
273.Integer-to-English-Words		273.Integer-to-English-Words
274.H-Index		274.H-Index
275.H-Index-II		275.H-Index-II
278.First-Bad-Version		278.First-Bad-Version
279.Perfect-Squares		279.Perfect-Squares
28.Implement-strStr		28.Implement-strStr
282.Expression-Add-Operators		282.Expression-Add-Operators
283.Move-Zeroes		283.Move-Zeroes
284.Peeking-Iterator		284.Peeking-Iterator
287.Find-the-Duplicate-Number		287.Find-the-Duplicate-Number
288.Game-of-Life		288.Game-of-Life
29.Divide-Two-Integers		29.Divide-Two-Integers
290.Word-Pattern		290.Word-Pattern
295.Find-Median-from-Data-Stream		295.Find-Median-from-Data-Stream
297.Serialize-and-Deserialize-Binary-Tree		297.Serialize-and-Deserialize-Binary-Tree
3.Longest-Substring-Without-Repeating-Characters		3.Longest-Substring-Without-Repeating-Characters
30.Substring-with-Concatenation-of-All-Words		30.Substring-with-Concatenation-of-All-Words
300.Longest-Increasing-Subsequence		300.Longest-Increasing-Subsequence
301.Remove-Invalid-Parentheses		301.Remove-Invalid-Parentheses
303.Range-Sum-Query-Immutable		303.Range-Sum-Query-Immutable
304.Range-Sum-Query-2D-Immutable		304.Range-Sum-Query-2D-Immutable
306.Additive-Number		306.Additive-Number
307.Range-Sum-Query-Mutable		307.Range-Sum-Query-Mutable
309.Best-Time-to-Buy-and-Sell-Stock-with-Cooldown		309.Best-Time-to-Buy-and-Sell-Stock-with-Cooldown
31.Next-Permutation		31.Next-Permutation
310.Minimum-Height-Trees		310.Minimum-Height-Trees
312.Burst-Balloons		312.Burst-Balloons
315.Count-of-Smaller-Numbers-After-Self		315.Count-of-Smaller-Numbers-After-Self
316.Remove-Duplicate-Letters		316.Remove-Duplicate-Letters
32.Longest-Valid-Parentheses		32.Longest-Valid-Parentheses
321.Create-Maximum-Number		321.Create-Maximum-Number
322.Coin-Change		322.Coin-Change
324.Wiggle-Sort-II		324.Wiggle-Sort-II
327.Count-of-Range-Sum		327.Count-of-Range-Sum
328.Odd-Even-Linked-List		328.Odd-Even-Linked-List
329.Longest-Increasing-Path-in-a-Matrix		329.Longest-Increasing-Path-in-a-Matrix
33.Search-in-Rotated-Sorted-Array		33.Search-in-Rotated-Sorted-Array
330.Patching-Array		330.Patching-Array
331.Verify-Preorder-Serialization-of-a-Binary-Tree		331.Verify-Preorder-Serialization-of-a-Binary-Tree
332.Reconstruct-Itinerary		332.Reconstruct-Itinerary
334.Increasing-Triplet-Subsequence		334.Increasing-Triplet-Subsequence
336.Palindrome-Pairs		336.Palindrome-Pairs
337.House-Robber-III		337.House-Robber-III
338.Counting-Bits		338.Counting-Bits
34.Find-First-and-Last-Position-of-Element-in-Sorted-Array		34.Find-First-and-Last-Position-of-Element-in-Sorted-Array
341.Flatten-Nested-List-Iterator		341.Flatten-Nested-List-Iterator
343.Integer-Break		343.Integer-Break
347.Top-K-Frequent-Elements		347.Top-K-Frequent-Elements
349.Intersection-of-Two-Arrays		349.Intersection-of-Two-Arrays
35.Search-Insert-Position		35.Search-Insert-Position
350.Intersection-of-Two-Arrays-II		350.Intersection-of-Two-Arrays-II
352.Data-Stream-as-Disjoint-Intervals		352.Data-Stream-as-Disjoint-Intervals
354.Russian-Doll-Envelopes		354.Russian-Doll-Envelopes
36.Valid-Sudoku		36.Valid-Sudoku
363.Max-Sum-of-Rectangle-No-Larger-Than-K		363.Max-Sum-of-Rectangle-No-Larger-Than-K
367.Valid-Perfect-Square		367.Valid-Perfect-Square
368.Largest-Divisible-Subset		368.Largest-Divisible-Subset
37.Sudoku-Solver		37.Sudoku-Solver
371.Sum-of-Two-Integers		371.Sum-of-Two-Integers
373.Find-K-Pairs-with-Smallest-Sums		373.Find-K-Pairs-with-Smallest-Sums
377.Combination-Sum-IV		377.Combination-Sum-IV
378.Kth-Smallest-Element-in-a-Sorted-Matrix		378.Kth-Smallest-Element-in-a-Sorted-Matrix
38.Count-and-Say		38.Count-and-Say
380.Insert-Delete-GetRandom-O1		380.Insert-Delete-GetRandom-O1
381.Insert-Delete-GetRandom-O1-Duplicates-allowed		381.Insert-Delete-GetRandom-O1-Duplicates-allowed
382.Linked-List-Random-Node		382.Linked-List-Random-Node
383.Ransom-Note		383.Ransom-Note
384.Shuffle-an-Array		384.Shuffle-an-Array
386.Lexicographical-Numbers		386.Lexicographical-Numbers
387.First-Unique-Character-in-a-String		387.First-Unique-Character-in-a-String
389.Find-the-Difference		389.Find-the-Difference
39.Combination-Sum		39.Combination-Sum
392.Is-Subsequence		392.Is-Subsequence
394.Decode-String		394.Decode-String
395.Longest-Substring-with-At-Least-K-Repeating-Characters		395.Longest-Substring-with-At-Least-K-Repeating-Characters
396.Rotate-Function		396.Rotate-Function
397.Integer-Replacement		397.Integer-Replacement
398.Random-Pick-Index		398.Random-Pick-Index
4.Median-of-Two-Sorted-Arrays		4.Median-of-Two-Sorted-Arrays
40.Combination-Sum-II		40.Combination-Sum-II
402.Remove-K-Digits		402.Remove-K-Digits
403.Frog-Jump		403.Frog-Jump
404.Sum-of-Left-Leaves		404.Sum-of-Left-Leaves
406.Queue-Reconstruction-by-Height		406.Queue-Reconstruction-by-Height
409.Longest-Palindrome		409.Longest-Palindrome
41.First-Missing-Positive		41.First-Missing-Positive
410.Split-Array-Largest-Sum		410.Split-Array-Largest-Sum
413.Arithmetic-Slices		413.Arithmetic-Slices
414.Third-Maximum-Number		414.Third-Maximum-Number
415.Add-Strings		415.Add-Strings
416.Partition-Equal-Subset-Sum		416.Partition-Equal-Subset-Sum
419.Battleships-in-a-Board		419.Battleships-in-a-Board
42.Trapping-Rain-Water		42.Trapping-Rain-Water
424.Longest-Repeating-Character-Replacement		424.Longest-Repeating-Character-Replacement
43.Multiply-Strings		43.Multiply-Strings
432.All-Oone-Data-Structure		432.All-Oone-Data-Structure
435.Non-overlapping-Intervals		435.Non-overlapping-Intervals
436.Find-Right-Interval		436.Find-Right-Interval
437.Path-Sum-III		437.Path-Sum-III
438.Find-All-Anagrams-in-a-String		438.Find-All-Anagrams-in-a-String
44.Wildcard-Matching		44.Wildcard-Matching
440.K-thSmallest-in-Lexicographical-Order		440.K-thSmallest-in-Lexicographical-Order
442.Find-All-Duplicates-in-an-Array		442.Find-All-Duplicates-in-an-Array
445.Add-Two-Numbers-II		445.Add-Two-Numbers-II
448.Find-All-Numbers-Disappeared-in-an-Array		448.Find-All-Numbers-Disappeared-in-an-Array
45.Jump-Game-II		45.Jump-Game-II
450.Delete-Node-in-a-BST		450.Delete-Node-in-a-BST
451.Sort-Characters-By-Frequency		451.Sort-Characters-By-Frequency
454.4Sum-II		454.4Sum-II
455.Assign-Cookies		455.Assign-Cookies
456.132-Pattern		456.132-Pattern
459.Repeated-Substring-Pattern		459.Repeated-Substring-Pattern
46.Permutations		46.Permutations
460.LFU-Cache		460.LFU-Cache
461.Hamming-Distance		461.Hamming-Distance
462.Minimum-Moves-to-Equal-Array-Elements-II		462.Minimum-Moves-to-Equal-Array-Elements-II
463.Island-Perimeter		463.Island-Perimeter
467.Unique-Substrings-in-Wraparound-String		467.Unique-Substrings-in-Wraparound-String
47.Permutations-II		47.Permutations-II
472.Concatenated-Words		472.Concatenated-Words
473.Matchsticks-to-Square		473.Matchsticks-to-Square
474.Ones-and-Zeroes		474.Ones-and-Zeroes
476.Number-Complement		476.Number-Complement
48.Rotate-Image		48.Rotate-Image
480.Sliding-Window-Median		480.Sliding-Window-Median
485.Max-Consecutive-Ones		485.Max-Consecutive-Ones
486.Predict-the-Winner		486.Predict-the-Winner
49.Group-Anagrams		49.Group-Anagrams
491.Increasing-Subsequences		491.Increasing-Subsequences
494.Target-Sum		494.Target-Sum
496.Next-Greater-Element-I		496.Next-Greater-Element-I
5.Longest-Palindromic-Substring		5.Longest-Palindromic-Substring
50.Pow		50.Pow
501.Find-Mode-in-Binary-Search-Tree		501.Find-Mode-in-Binary-Search-Tree
503.Next-Greater-Element-II		503.Next-Greater-Element-II
504.Base-7		504.Base-7
508.Most-Frequent-Subtree-Sum		508.Most-Frequent-Subtree-Sum
51.N-Queens		51.N-Queens
513.Find-Bottom-Left-Tree-Value		513.Find-Bottom-Left-Tree-Value
515.Find-Largest-Value-in-Each-Tree-Row		515.Find-Largest-Value-in-Each-Tree-Row
516.Longest-Palindromic-Subsequence		516.Longest-Palindromic-Subsequence
518.Coin-Change-2		518.Coin-Change-2
52.N-Queens-II		52.N-Queens-II
523.Continuous-Subarray-Sum		523.Continuous-Subarray-Sum
524.Longest-Word-in-Dictionary-through-Deleting		524.Longest-Word-in-Dictionary-through-Deleting
525.Contiguous-Array		525.Contiguous-Array
526.Beautiful-Arrangement		526.Beautiful-Arrangement
53.Maximum-Subarray		53.Maximum-Subarray
530.Minimum-Absolute-Difference-in-BST		530.Minimum-Absolute-Difference-in-BST
538.Convert-BST-to-Greater-Tree		538.Convert-BST-to-Greater-Tree
539.Minimum-Time-Difference		539.Minimum-Time-Difference
54.Spiral-Matrix		54.Spiral-Matrix
540.Single-Element-in-a-Sorted-Array		540.Single-Element-in-a-Sorted-Array
543.Diameter-of-Binary-Tree		543.Diameter-of-Binary-Tree
547.Friend-Circles		547.Friend-Circles
55.Jump-Game		55.Jump-Game
556.Next-Greater-Element-III		556.Next-Greater-Element-III
557.Reverse-Words-in-a-String-III		557.Reverse-Words-in-a-String-III
56.Merge-Intervals		56.Merge-Intervals
560.Subarray-Sum-Equals-K		560.Subarray-Sum-Equals-K
563.Binary-Tree-Tilt		563.Binary-Tree-Tilt
565.Array-Nesting		565.Array-Nesting
567.Permutation-in-String		567.Permutation-in-String
57.Insert-Interval		57.Insert-Interval
572.Subtree-of-Another-Tree		572.Subtree-of-Another-Tree
58.Length-of-Last-Word		58.Length-of-Last-Word
581.Shortest-Unsorted-Continuous-Subarray		581.Shortest-Unsorted-Continuous-Subarray
583.Delete-Operation-for-Two-Strings		583.Delete-Operation-for-Two-Strings
59.Spiral-Matrix-II		59.Spiral-Matrix-II
594.Longest-Harmonious-Subsequence		594.Longest-Harmonious-Subsequence
599.Minimum-Index-Sum-of-Two-Lists		599.Minimum-Index-Sum-of-Two-Lists
6.ZigZag-Conversion		6.ZigZag-Conversion
60.Permutation-Sequence		60.Permutation-Sequence
605.Can-Place-Flowers		605.Can-Place-Flowers
606.Construct-String-from-Binary-Tree		606.Construct-String-from-Binary-Tree
61.Rotate-List		61.Rotate-List
611.Valid-Triangle-Number		611.Valid-Triangle-Number
617.Merge-Two-Binary-Trees		617.Merge-Two-Binary-Trees
62.Unique-Paths		62.Unique-Paths
621.Task-Scheduler		621.Task-Scheduler
622.Design-Circular-Queue		622.Design-Circular-Queue
623.Add-One-Row-to-Tree		623.Add-One-Row-to-Tree
628.Maximum-Product-of-Three-Numbers		628.Maximum-Product-of-Three-Numbers
63.Unique-Paths-II		63.Unique-Paths-II
630.Course-Schedule-III		630.Course-Schedule-III
632.Smallest-Range		632.Smallest-Range
633.Sum-of-Square-Numbers		633.Sum-of-Square-Numbers
637.Average-of-Levels-in-Binary-Tree		637.Average-of-Levels-in-Binary-Tree
64.Minimum-Path-Sum		64.Minimum-Path-Sum
643.Maximum-Average-Subarray-I		643.Maximum-Average-Subarray-I
646.Maximum-Length-of-Pair-Chain		646.Maximum-Length-of-Pair-Chain
647.Palindromic-Substrings		647.Palindromic-Substrings
648.Replace-Words		648.Replace-Words
65.Valid-Number		65.Valid-Number
650.2-Keys-Keyboard		650.2-Keys-Keyboard
652.Find-Duplicate-Subtrees		652.Find-Duplicate-Subtrees
653.Two-Sum-IV-Input-is-a-BST		653.Two-Sum-IV-Input-is-a-BST
654.Maximum-Binary-Tree		654.Maximum-Binary-Tree
658.Find-K-Closest-Elements		658.Find-K-Closest-Elements
659.Split-Array-into-Consecutive-Subsequences		659.Split-Array-into-Consecutive-Subsequences
66.Plus-One		66.Plus-One
662.Maximum-Width-of-Binary-Tree		662.Maximum-Width-of-Binary-Tree
665.Non-decreasing-Array		665.Non-decreasing-Array
669.Trim-a-Binary-Search-Tree		669.Trim-a-Binary-Search-Tree
67.Add-Binary		67.Add-Binary
670.Maximum-Swap		670.Maximum-Swap
673.Number-of-Longest-Increasing-Subsequence		673.Number-of-Longest-Increasing-Subsequence
674.Longest-Continuous-Increasing-Subsequence		674.Longest-Continuous-Increasing-Subsequence
677.Map-Sum-Pairs		677.Map-Sum-Pairs
678.Valid-Parenthesis-String		678.Valid-Parenthesis-String
68.Text-Justification		68.Text-Justification
680.Valid-Palindrome-II		680.Valid-Palindrome-II
684.Redundant-Connection		684.Redundant-Connection
687.Longest-Univalue-Path		687.Longest-Univalue-Path
69.Sqrt		69.Sqrt
690.Employee-Importance		690.Employee-Importance
692.Top-K-Frequent-Words		692.Top-K-Frequent-Words
695.Max-Area-of-Island		695.Max-Area-of-Island
696.Count-Binary-Substrings		696.Count-Binary-Substrings
698.Partition-to-K-Equal-Sum-Subsets		698.Partition-to-K-Equal-Sum-Subsets
7.Reverse-Integer		7.Reverse-Integer
70.Climbing-Stairs		70.Climbing-Stairs
700.Search-in-a-Binary-Search-Tree		700.Search-in-a-Binary-Search-Tree
701.Insert-into-a-Binary-Search-Tree		701.Insert-into-a-Binary-Search-Tree
703.Kth-Largest-Element-in-a-Stream		703.Kth-Largest-Element-in-a-Stream
704.Binary-Search		704.Binary-Search
71.Simplify-Path		71.Simplify-Path
710.Random-Pick-with-Blacklist		710.Random-Pick-with-Blacklist
712.Minimum-ASCII-Delete-Sum-for-Two-Strings		712.Minimum-ASCII-Delete-Sum-for-Two-Strings
713.Subarray-Product-Less-Than-K		713.Subarray-Product-Less-Than-K
714.Best-Time-to-Buy-and-Sell-Stock-with-Transaction-Fee		714.Best-Time-to-Buy-and-Sell-Stock-with-Transaction-Fee
715.Range-Module		715.Range-Module
718.Maximum-Length-of-Repeated-Subarray		718.Maximum-Length-of-Repeated-Subarray
719.Find-K-th-Smallest-Pair-Distance		719.Find-K-th-Smallest-Pair-Distance
72.Edit-Distance		72.Edit-Distance
724.Find-Pivot-Index		724.Find-Pivot-Index
725.Split-Linked-List-in-Parts		725.Split-Linked-List-in-Parts
729.My-Calendar-I		729.My-Calendar-I
73.Set-Matrix-Zeroes		73.Set-Matrix-Zeroes
731.My-Calendar-II		731.My-Calendar-II
732.My-Calendar-III		732.My-Calendar-III
735.Asteroid-Collision		735.Asteroid-Collision
738.Monotone-Increasing-Digits		738.Monotone-Increasing-Digits
739.Daily-Temperatures		739.Daily-Temperatures
74.Search-a-2D-Matrix		74.Search-a-2D-Matrix
740.Delete-and-Earn		740.Delete-and-Earn
743.Network-Delay-Time		743.Network-Delay-Time
746.Min-Cost-Climbing-Stairs		746.Min-Cost-Climbing-Stairs
75.Sort-Colors		75.Sort-Colors
752.Open-the-Lock		752.Open-the-Lock
757.Set-Intersection-Size-At-Least-Two		757.Set-Intersection-Size-At-Least-Two
76.Minimum-Window-Substring		76.Minimum-Window-Substring
763.Partition-Labels		763.Partition-Labels
764.Largest-Plus-Sign		764.Largest-Plus-Sign
765.Couples-Holding-Hands		765.Couples-Holding-Hands
766.Toeplitz-Matrix		766.Toeplitz-Matrix
767.Reorganize-String		767.Reorganize-String
768.Max-Chunks-To-Make-Sorted-II		768.Max-Chunks-To-Make-Sorted-II
769.Max-Chunks-To-Make-Sorted		769.Max-Chunks-To-Make-Sorted
77.Combinations		77.Combinations
771.Jewels-and-Stones		771.Jewels-and-Stones
773.Sliding-Puzzle		773.Sliding-Puzzle
778.Swim-in-Rising-Water		778.Swim-in-Rising-Water
78.Subsets		78.Subsets
783.Minimum-Distance-Between-BST-Nodes		783.Minimum-Distance-Between-BST-Nodes
784.Letter-Case-Permutation		784.Letter-Case-Permutation
785.Is-Graph-Bipartite		785.Is-Graph-Bipartite
786.K-th-Smallest-Prime-Fraction		786.K-th-Smallest-Prime-Fraction
787.Cheapest-Flights-Within-K-Stops		787.Cheapest-Flights-Within-K-Stops
79.Word-Search		79.Word-Search
791.Custom-Sort-String		791.Custom-Sort-String
795.Number-of-Subarrays-with-Bounded-Maximum		795.Number-of-Subarrays-with-Bounded-Maximum
797.All-Paths-From-Source-to-Target		797.All-Paths-From-Source-to-Target
799.Champagne-Tower		799.Champagne-Tower
8.String-to-Integer-atoi		8.String-to-Integer-atoi
80.Remove-Duplicates-from-Sorted-Array-II		80.Remove-Duplicates-from-Sorted-Array-II
801.Minimum-Swaps-To-Make-Sequences-Increasing		801.Minimum-Swaps-To-Make-Sequences-Increasing
802.Find-Eventual-Safe-States		802.Find-Eventual-Safe-States
805.Split-Array-With-Same-Average		805.Split-Array-With-Same-Average
807.Max-Increase-to-Keep-City-Skyline		807.Max-Increase-to-Keep-City-Skyline
81.Search-in-Rotated-Sorted-Array-II		81.Search-in-Rotated-Sorted-Array-II
813.Largest-Sum-of-Averages		813.Largest-Sum-of-Averages
814.Binary-Tree-Pruning		814.Binary-Tree-Pruning
815.Bus-Routes		815.Bus-Routes
82.Remove-Duplicates-from-Sorted-List-II		82.Remove-Duplicates-from-Sorted-List-II
821.Shortest-Distance-to-a-Character		821.Shortest-Distance-to-a-Character
823.Binary-Trees-With-Factors		823.Binary-Trees-With-Factors
826.Most-Profit-Assigning-Work		826.Most-Profit-Assigning-Work
827.Making-A-Large-Island		827.Making-A-Large-Island
828.Unique-Letter-String		828.Unique-Letter-String
83.Remove-Duplicates-from-Sorted-List		83.Remove-Duplicates-from-Sorted-List
830.Positions-of-Large-Groups		830.Positions-of-Large-Groups
836.Rectangle-Overlap		836.Rectangle-Overlap
839.Similar-String-Groups		839.Similar-String-Groups
84.Largest-Rectangle-in-Histogram		84.Largest-Rectangle-in-Histogram
841.Keys-and-Rooms		841.Keys-and-Rooms
842.Split-Array-into-Fibonacci-Sequence		842.Split-Array-into-Fibonacci-Sequence
844.Backspace-String-Compare		844.Backspace-String-Compare
845.Longest-Mountain-in-Array		845.Longest-Mountain-in-Array
846.Hand-of-Straights		846.Hand-of-Straights
848.Shifting-Letters		848.Shifting-Letters
849.Maximize-Distance-to-Closest-Person		849.Maximize-Distance-to-Closest-Person
85.Maximal-Rectangle		85.Maximal-Rectangle
854.K-Similar-Strings		854.K-Similar-Strings
855.Exam-Room		855.Exam-Room
856.Score-of-Parentheses		856.Score-of-Parentheses
857.Minimum-Cost-to-Hire-K-Workers		857.Minimum-Cost-to-Hire-K-Workers
859.Buddy-Strings		859.Buddy-Strings
86.Partition-List		86.Partition-List
862.Shortest-Subarray-with-Sum-at-Least-K		862.Shortest-Subarray-with-Sum-at-Least-K
863.All-Nodes-Distance-K-in-Binary-Tree		863.All-Nodes-Distance-K-in-Binary-Tree
865.Smallest-Subtree-with-all-the-Deepest-Nodes		865.Smallest-Subtree-with-all-the-Deepest-Nodes
87.Scramble-String		87.Scramble-String
870.Advantage-Shuffle		870.Advantage-Shuffle
871.Minimum-Number-of-Refueling-Stops		871.Minimum-Number-of-Refueling-Stops
872.Leaf-Similar-Trees		872.Leaf-Similar-Trees
88.Merge-Sorted-Array		88.Merge-Sorted-Array
881.Boats-to-Save-People		881.Boats-to-Save-People
886.Possible-Bipartition		886.Possible-Bipartition
887.Super-Egg-Drop		887.Super-Egg-Drop
889.Construct-Binary-Tree-from-Preorder-and-Postorder-Traversal		889.Construct-Binary-Tree-from-Preorder-and-Postorder-Traversal
89.Gray-Code		89.Gray-Code
890.Find-and-Replace-Pattern		890.Find-and-Replace-Pattern
894.All-Possible-Full-Binary-Trees		894.All-Possible-Full-Binary-Trees
895.Maximum-Frequency-Stack		895.Maximum-Frequency-Stack
897.Increasing-Order-Search-Tree		897.Increasing-Order-Search-Tree
9.Palindrome-Number		9.Palindrome-Number
90.Subsets-II		90.Subsets-II
905.Sort-Array-By-Parity		905.Sort-Array-By-Parity
907.Sum-of-Subarray-Minimums		907.Sum-of-Subarray-Minimums
91.Decode-Ways		91.Decode-Ways
915.Partition-Array-into-Disjoint-Intervals		915.Partition-Array-into-Disjoint-Intervals
918.Maximum-Sum-Circular-Subarray		918.Maximum-Sum-Circular-Subarray
919.Complete-Binary-Tree-Inserter		919.Complete-Binary-Tree-Inserter
92.Reverse-Linked-List-II		92.Reverse-Linked-List-II
926.Flip-String-to-Monotone-Increasing		926.Flip-String-to-Monotone-Increasing
93.Restore-IP-Addresses		93.Restore-IP-Addresses
930.Binary-Subarrays-With-Sum		930.Binary-Subarrays-With-Sum
938.Range-Sum-of-BST		938.Range-Sum-of-BST
94.Binary-Tree-Inorder-Traversal		94.Binary-Tree-Inorder-Traversal
940.Distinct-Subsequences-II		940.Distinct-Subsequences-II
945.Minimum-Increment-to-Make-Array-Unique		945.Minimum-Increment-to-Make-Array-Unique
946.Validate-Stack-Sequences		946.Validate-Stack-Sequences
947.Most-Stones-Removed-with-Same-Row-or-Column		947.Most-Stones-Removed-with-Same-Row-or-Column
95.Unique-Binary-Search-Trees-II		95.Unique-Binary-Search-Trees-II
951.Flip-Equivalent-Binary-Trees		951.Flip-Equivalent-Binary-Trees
958.Check-Completeness-of-a-Binary-Tree		958.Check-Completeness-of-a-Binary-Tree
96.Unique-Binary-Search-Trees		96.Unique-Binary-Search-Trees
962.Maximum-Width-Ramp		962.Maximum-Width-Ramp
965.Univalued-Binary-Tree		965.Univalued-Binary-Tree
968.Binary-Tree-Cameras		968.Binary-Tree-Cameras
97.Interleaving-String		97.Interleaving-String
974.Subarray-Sums-Divisible-by-K		974.Subarray-Sums-Divisible-by-K
979.Distribute-Coins-in-Binary-Tree		979.Distribute-Coins-in-Binary-Tree
98.Validate-Binary-Search-Tree		98.Validate-Binary-Search-Tree
983.Minimum-Cost-For-Tickets		983.Minimum-Cost-For-Tickets
986.Interval-List-Intersections		986.Interval-List-Intersections
988.Smallest-String-Starting-From-Leaf		988.Smallest-String-Starting-From-Leaf
99.Recover-Binary-Search-Tree		99.Recover-Binary-Search-Tree
990.Satisfiability-of-Equality-Equations		990.Satisfiability-of-Equality-Equations
992.Subarrays-with-K-Different-Integers		992.Subarrays-with-K-Different-Integers
993.Cousins-in-Binary-Tree		993.Cousins-in-Binary-Tree
997.Find-the-Town-Judge		997.Find-the-Town-Judge
README.md		README.md

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Some work on the leetcode questions. Thanks for all the brilliant ideas and codes in the community.

Some other codes are in https://github.com/jliu22/test/tree/master/coding.

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