LeetCode 的 Go 解答

进度

统计规则：1.免费题，2.算法题，3.能提交 Go 解答

	Easy	Medium	Hard	Total
Accepted	265	455	187	907
Total	265	461	193	919

题解

题号	题目	通过率	难度	收藏
1220	* Count Vowels Permutation	52%	Hard
1219	* Path with Maximum Gold	60%	Medium
1218	* Longest Arithmetic Subsequence of Given Difference	36%	Medium
1217	Play with Chips	62%	Easy
1210	* Minimum Moves to Reach Target with Rotations	42%	Hard
1209	* Remove All Adjacent Duplicates in String II	58%	Medium
1208	* Get Equal Substrings Within Budget	35%	Medium
1207	Unique Number of Occurrences	73%	Easy
1206	* Design Skiplist	59%	Hard
1203	* Sort Items by Groups Respecting Dependencies	45%	Hard
1202	Smallest String With Swaps	40%	Medium
1201	* Ugly Number III	24%	Medium
1200	Minimum Absolute Difference	66%	Easy
1192	* Critical Connections in a Network	45%	Hard
1191	* K-Concatenation Maximum Sum	24%	Medium
1190	Reverse Substrings Between Each Pair of Parentheses	57%	Medium	❤
1189	Maximum Number of Balloons	62%	Easy
1187	* Make Array Strictly Increasing	39%	Hard
1186	Maximum Subarray Sum with One Deletion	33%	Medium	❤
1185	Day of the Week	65%	Easy
1184	Distance Between Bus Stops	56%	Easy
1178	Number of Valid Words for Each Puzzle	35%	Hard	❤
1177	Can Make Palindrome from Substring	32%	Medium	❤
1175	Prime Arrangements	50%	Easy
1172	Dinner Plate Stacks	41%	Hard	❤
1171	Remove Zero Sum Consecutive Nodes from Linked List	42%	Medium
1170	Compare Strings by Frequency of the Smallest Character	59%	Easy
1169	Invalid Transactions	27%	Medium
1163	Last Substring in Lexicographical Order	30%	Hard	❤
1162	As Far from Land as Possible	39%	Medium
1161	Maximum Level Sum of a Binary Tree	71%	Medium
1160	Find Words That Can Be Formed by Characters	66%	Easy
1157	Online Majority Element In Subarray	33%	Hard	❤
1156	Swap For Longest Repeated Character Substring	46%	Medium
1155	Number of Dice Rolls With Target Sum	48%	Medium	❤
1154	Day of the Year	49%	Easy
1147	Longest Chunked Palindrome Decomposition	58%	Hard
1146	Snapshot Array	32%	Medium	❤
1145	Binary Tree Coloring Game	48%	Medium	❤
1144	Decrease Elements To Make Array Zigzag	42%	Medium
1143	Longest Common Subsequence	57%	Medium
1140	Stone Game II	60%	Medium	❤
1139	Largest 1-Bordered Square	44%	Medium	❤
1138	Alphabet Board Path	44%	Medium	❤
1137	N-th Tribonacci Number	58%	Easy	❤
1131	Maximum of Absolute Value Expression	52%	Medium	❤
1130	Minimum Cost Tree From Leaf Values	61%	Medium	❤
1129	Shortest Path with Alternating Colors	37%	Medium	❤
1128	Number of Equivalent Domino Pairs	45%	Easy
1125	Smallest Sufficient Team	44%	Hard	❤
1124	Longest Well-Performing Interval	31%	Medium
1123	Lowest Common Ancestor of Deepest Leaves	64%	Medium
1122	Relative Sort Array	66%	Easy
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	67%	Medium
1110	Delete Nodes And Return Forest	63%	Medium
1109	Corporate Flight Bookings	49%	Medium
1108	Defanging an IP Address	83%	Easy
1106	Parsing A Boolean Expression	57%	Hard
1105	Filling Bookcase Shelves	56%	Medium	❤
1104	Path In Zigzag Labelled Binary Tree	70%	Medium
1103	Distribute Candies to People	60%	Easy
1096	Brace Expansion II	58%	Hard
1095	Find in Mountain Array	34%	Hard
1094	Car Pooling	57%	Medium
1093	Statistics from a Large Sample	44%	Medium
1092	Shortest Common Supersequence	49%	Hard	❤
1091	Shortest Path in Binary Matrix	36%	Medium
1090	Largest Values From Labels	57%	Medium
1089	Duplicate Zeros	58%	Easy	❤
1081	Smallest Subsequence of Distinct Characters	44%	Medium
1080	Insufficient Nodes in Root to Leaf Paths	44%	Medium	❤
1079	Letter Tile Possibilities	74%	Medium	❤
1078	Occurrences After Bigram	64%	Easy
1074	Number of Submatrices That Sum to Target	58%	Hard	❤
1073	Adding Two Negabinary Numbers	32%	Medium	❤
1072	Flip Columns For Maximum Number of Equal Rows	58%	Medium	❤
1071	Greatest Common Divisor of Strings	53%	Easy	❤
1054	Distant Barcodes	40%	Medium	❤
1053	Previous Permutation With One Swap	46%	Medium
1052	Grumpy Bookstore Owner	53%	Medium
1051	Height Checker	68%	Easy
1049	Last Stone Weight II	41%	Medium	❤
1048	Longest String Chain	50%	Medium	❤
1047	Remove All Adjacent Duplicates In String	64%	Easy
1046	Last Stone Weight	62%	Easy
1044	Longest Duplicate Substring	23%	Hard	❤
1043	Partition Array for Maximum Sum	62%	Medium	❤
1042	Flower Planting With No Adjacent	48%	Easy	❤
1041	Robot Bounded In Circle	45%	Medium
1040	Moving Stones Until Consecutive II	49%	Medium	❤
1039	Minimum Score Triangulation of Polygon	43%	Medium	❤
1038	Binary Search Tree to Greater Sum Tree	77%	Medium
1037	Valid Boomerang	37%	Easy
1036	Escape a Large Maze	34%	Hard
1035	Uncrossed Lines	52%	Medium	❤
1034	Coloring A Border	42%	Medium
1033	Moving Stones Until Consecutive	38%	Easy
1032	Stream of Characters	44%	Hard	❤
1031	Maximum Sum of Two Non-Overlapping Subarrays	55%	Medium	❤
1030	Matrix Cells in Distance Order	64%	Easy	❤
1029	Two City Scheduling	54%	Easy
1028	Recover a Tree From Preorder Traversal	69%	Hard	❤
1027	Longest Arithmetic Sequence	50%	Medium	❤
1026	Maximum Difference Between Node and Ancestor	61%	Medium	❤
1025	Divisor Game	65%	Easy	❤
1024	Video Stitching	47%	Medium	❤
1023	Camelcase Matching	54%	Medium
1022	Sum of Root To Leaf Binary Numbers	61%	Easy	❤
1021	Remove Outermost Parentheses	75%	Easy
1020	Number of Enclaves	54%	Medium
1019	Next Greater Node In Linked List	56%	Medium	❤
1018	Binary Prefix Divisible By 5	46%	Easy
1017	Convert to Base -2	57%	Medium
1016	Binary String With Substrings Representing 1 To N	58%	Medium
1015	Smallest Integer Divisible by K	29%	Medium	❤
1014	Best Sightseeing Pair	50%	Medium
1013	Partition Array Into Three Parts With Equal Sum	56%	Easy
1012	Numbers With Repeated Digits	35%	Hard	❤
1011	Capacity To Ship Packages Within D Days	54%	Medium	❤
1010	Pairs of Songs With Total Durations Divisible by 60	46%	Easy
1009	Complement of Base 10 Integer	59%	Easy	❤
1008	Construct Binary Search Tree from Preorder Traversal	73%	Medium
1007	Minimum Domino Rotations For Equal Row	51%	Medium
1006	Clumsy Factorial	53%	Medium
1005	Maximize Sum Of Array After K Negations	50%	Easy
1004	Max Consecutive Ones III	55%	Medium	❤
1003	Check If Word Is Valid After Substitutions	52%	Medium
1002	Find Common Characters	65%	Easy
1001	Grid Illumination	34%	Hard	❤
1000	Minimum Cost to Merge Stones	36%	Hard	❤
0999	Available Captures for Rook	65%	Easy
0998	Maximum Binary Tree II	61%	Medium
0997	Find the Town Judge	49%	Easy
0996	Number of Squareful Arrays	47%	Hard	❤
0995	Minimum Number of K Consecutive Bit Flips	47%	Hard
0994	Rotting Oranges	46%	Easy
0993	Cousins in Binary Tree	51%	Easy
0992	Subarrays with K Different Integers	45%	Hard	❤
0991	Broken Calculator	41%	Medium	❤
0990	Satisfiability of Equality Equations	41%	Medium
0989	Add to Array-Form of Integer	43%	Easy
0988	Smallest String Starting From Leaf	44%	Medium
0987	Vertical Order Traversal of a Binary Tree	32%	Medium
0986	Interval List Intersections	64%	Medium	❤
0985	Sum of Even Numbers After Queries	62%	Easy
0984	String Without AAA or BBB	34%	Medium
0983	Minimum Cost For Tickets	57%	Medium	❤
0982	Triples with Bitwise AND Equal To Zero	54%	Hard	❤
0981	Time Based Key-Value Store	51%	Medium
0980	Unique Paths III	71%	Hard	❤
0979	Distribute Coins in Binary Tree	67%	Medium	❤
0978	Longest Turbulent Subarray	45%	Medium	❤
0977	Squares of a Sorted Array	71%	Easy
0976	Largest Perimeter Triangle	57%	Easy	❤
0975	Odd Even Jump	45%	Hard	❤
0974	Subarray Sums Divisible by K	46%	Medium	❤
0973	K Closest Points to Origin	61%	Medium
0972	Equal Rational Numbers	40%	Hard	❤
0971	Flip Binary Tree To Match Preorder Traversal	43%	Medium	❤
0970	Powerful Integers	39%	Easy
0969	Pancake Sorting	62%	Medium
0968	Binary Tree Cameras	35%	Hard
0967	Numbers With Same Consecutive Differences	37%	Medium
0966	Vowel Spellchecker	43%	Medium
0965	Univalued Binary Tree	66%	Easy
0964	Least Operators to Express Number	41%	Hard	❤
0963	Minimum Area Rectangle II	46%	Medium
0962	Maximum Width Ramp	42%	Medium	❤
0961	N-Repeated Element in Size 2N Array	72%	Easy
0960	Delete Columns to Make Sorted III	52%	Hard	❤
0959	Regions Cut By Slashes	63%	Medium
0958	Check Completeness of a Binary Tree	49%	Medium
0957	Prison Cells After N Days	37%	Medium
0956	Tallest Billboard	38%	Hard	❤
0955	Delete Columns to Make Sorted II	32%	Medium	❤
0954	Array of Doubled Pairs	35%	Medium
0953	Verifying an Alien Dictionary	55%	Easy
0952	Largest Component Size by Common Factor	27%	Hard	❤
0951	Flip Equivalent Binary Trees	65%	Medium
0950	Reveal Cards In Increasing Order	72%	Medium
0949	Largest Time for Given Digits	34%	Easy	❤
0948	Bag of Tokens	39%	Medium	❤
0947	Most Stones Removed with Same Row or Column	54%	Medium	❤
0946	Validate Stack Sequences	58%	Medium
0945	Minimum Increment to Make Array Unique	43%	Medium	❤
0944	Delete Columns to Make Sorted	69%	Easy
0943	Find the Shortest Superstring	39%	Hard	❤
0942	DI String Match	69%	Easy
0941	Valid Mountain Array	35%	Easy
0940	Distinct Subsequences II	40%	Hard	❤
0939	Minimum Area Rectangle	51%	Medium	❤
0938	Range Sum of BST	78%	Easy
0937	Reorder Data in Log Files	54%	Easy
0936	Stamping The Sequence	35%	Hard	❤
0935	Knight Dialer	42%	Medium
0934	Shortest Bridge	45%	Medium
0933	Number of Recent Calls	69%	Easy
0932	Beautiful Array	54%	Medium	❤
0931	Minimum Falling Path Sum	59%	Medium
0930	Binary Subarrays With Sum	39%	Medium
0929	Unique Email Addresses	68%	Easy
0928	Minimize Malware Spread II	39%	Hard
0927	Three Equal Parts	31%	Hard
0926	Flip String to Monotone Increasing	50%	Medium
0925	Long Pressed Name	44%	Easy
0924	Minimize Malware Spread	40%	Hard
0923	3Sum With Multiplicity	34%	Medium	❤
0922	Sort Array By Parity II	67%	Easy
0921	Minimum Add to Make Parentheses Valid	70%	Medium	❤
0920	Number of Music Playlists	44%	Hard	❤
0919	Complete Binary Tree Inserter	55%	Medium	❤
0918	Maximum Sum Circular Subarray	33%	Medium	❤
0917	Reverse Only Letters	56%	Easy
0916	Word Subsets	45%	Medium
0915	Partition Array into Disjoint Intervals	44%	Medium	❤
0914	X of a Kind in a Deck of Cards	33%	Easy
0913	Cat and Mouse	29%	Hard	❤
0912	Sort an Array	62%	Medium
0911	Online Election	48%	Medium	❤
0910	Smallest Range II	24%	Medium	❤
0909	Snakes and Ladders	35%	Medium	❤
0908	Smallest Range I	65%	Easy
0907	Sum of Subarray Minimums	29%	Medium	❤
0906	Super Palindromes	30%	Hard
0905	Sort Array By Parity	72%	Easy
0904	Fruit Into Baskets	41%	Medium	❤
0903	Valid Permutations for DI Sequence	46%	Hard	❤
0902	Numbers At Most N Given Digit Set	29%	Hard
0901	Online Stock Span	51%	Medium	❤
0900	RLE Iterator	51%	Medium
0899	Orderly Queue	48%	Hard
0898	Bitwise ORs of Subarrays	35%	Medium	❤
0897	Increasing Order Search Tree	66%	Easy	❤
0896	Monotonic Array	55%	Easy	❤
0895	Maximum Frequency Stack	57%	Hard	❤
0894	All Possible Full Binary Trees	71%	Medium
0893	Groups of Special-Equivalent Strings	63%	Easy
0892	Surface Area of 3D Shapes	56%	Easy
0891	Sum of Subsequence Widths	30%	Hard
0890	Find and Replace Pattern	71%	Medium
0889	Construct Binary Tree from Preorder and Postorder Traversal	61%	Medium
0888	Fair Candy Swap	56%	Easy
0887	Super Egg Drop	25%	Hard
0886	Possible Bipartition	41%	Medium
0885	Spiral Matrix III	65%	Medium
0884	Uncommon Words from Two Sentences	61%	Easy
0883	Projection Area of 3D Shapes	66%	Easy
0882	Reachable Nodes In Subdivided Graph	38%	Hard
0881	Boats to Save People	44%	Medium
0880	Decoded String at Index	23%	Medium
0879	Profitable Schemes	37%	Hard	❤
0878	Nth Magical Number	26%	Hard
0877	Stone Game	62%	Medium
0876	Middle of the Linked List	65%	Easy
0875	Koko Eating Bananas	47%	Medium
0874	Walking Robot Simulation	33%	Easy
0873	Length of Longest Fibonacci Subsequence	46%	Medium
0872	Leaf-Similar Trees	64%	Easy
0871	Minimum Number of Refueling Stops	30%	Hard
0870	Advantage Shuffle	43%	Medium
0869	Reordered Power of 2	51%	Medium
0868	Binary Gap	59%	Easy
0867	Transpose Matrix	63%	Easy
0866	Prime Palindrome	20%	Medium	❤
0865	Smallest Subtree with all the Deepest Nodes	57%	Medium
0864	Shortest Path to Get All Keys	38%	Hard	❤
0863	All Nodes Distance K in Binary Tree	50%	Medium	❤
0862	Shortest Subarray with Sum at Least K	22%	Hard	❤
0861	Score After Flipping Matrix	70%	Medium
0860	Lemonade Change	50%	Easy
0859	Buddy Strings	27%	Easy
0858	Mirror Reflection	52%	Medium
0857	Minimum Cost to Hire K Workers	48%	Hard	❤
0856	Score of Parentheses	57%	Medium
0855	Exam Room	39%	Medium
0854	K-Similar Strings	35%	Hard	❤
0853	Car Fleet	41%	Medium
0852	Peak Index in a Mountain Array	70%	Easy	❤
0851	Loud and Rich	49%	Medium	❤
0850	Rectangle Area II	45%	Hard	❤
0849	Maximize Distance to Closest Person	41%	Easy	❤
0848	Shifting Letters	42%	Medium
0847	Shortest Path Visiting All Nodes	48%	Hard	❤
0846	Hand of Straights	50%	Medium	❤
0845	Longest Mountain in Array	35%	Medium
0844	Backspace String Compare	46%	Easy
0843	Guess the Word	44%	Hard	❤
0842	Split Array into Fibonacci Sequence	35%	Medium
0841	Keys and Rooms	61%	Medium
0840	Magic Squares In Grid	36%	Easy
0839	Similar String Groups	35%	Hard	❤
0838	Push Dominoes	45%	Medium	❤
0837	New 21 Game	32%	Medium	❤
0836	Rectangle Overlap	47%	Easy
0835	Image Overlap	54%	Medium
0834	Sum of Distances in Tree	40%	Hard	❤
0833	Find And Replace in String	47%	Medium
0832	Flipping an Image	73%	Easy
0831	Masking Personal Information	42%	Medium
0830	Positions of Large Groups	48%	Easy
0829	Consecutive Numbers Sum	34%	Hard	❤
0828	Unique Letter String	41%	Hard	❤
0827	Making A Large Island	43%	Hard	❤
0826	Most Profit Assigning Work	36%	Medium	❤
0825	Friends Of Appropriate Ages	38%	Medium
0824	Goat Latin	58%	Easy
0823	Binary Trees With Factors	33%	Medium
0822	Card Flipping Game	41%	Medium
0821	Shortest Distance to a Character	64%	Easy
0820	Short Encoding of Words	48%	Medium	❤
0819	Most Common Word	42%	Easy
0818	Race Car	36%	Hard	❤
0817	Linked List Components	55%	Medium
0816	Ambiguous Coordinates	45%	Medium
0815	Bus Routes	41%	Hard	❤
0814	Binary Tree Pruning	71%	Medium
0813	Largest Sum of Averages	46%	Medium	❤
0812	Largest Triangle Area	56%	Easy
0811	Subdomain Visit Count	66%	Easy
0810	Chalkboard XOR Game	45%	Hard	❤
0809	Expressive Words	44%	Medium
0808	Soup Servings	38%	Medium
0807	Max Increase to Keep City Skyline	82%	Medium
0806	Number of Lines To Write String	63%	Easy
0805	Split Array With Same Average	25%	Hard	❤
0804	Unique Morse Code Words	75%	Easy
0803	Bricks Falling When Hit	29%	Hard	❤
0802	Find Eventual Safe States	45%	Medium	❤
0801	Minimum Swaps To Make Sequences Increasing	35%	Medium	❤
0799	Champagne Tower	34%	Medium	❤
0798	Smallest Rotation with Highest Score	41%	Hard	❤
0797	All Paths From Source to Target	71%	Medium
0796	Rotate String	49%	Easy
0795	Number of Subarrays with Bounded Maximum	44%	Medium	❤
0794	Valid Tic-Tac-Toe State	30%	Medium
0793	Preimage Size of Factorial Zeroes Function	39%	Hard	❤
0792	Number of Matching Subsequences	45%	Medium	❤
0791	Custom Sort String	63%	Medium
0790	Domino and Tromino Tiling	37%	Medium	❤
0789	Escape The Ghosts	55%	Medium
0788	Rotated Digits	55%	Easy
0787	Cheapest Flights Within K Stops	36%	Medium	❤
0786	K-th Smallest Prime Fraction	40%	Hard	❤
0785	Is Graph Bipartite?	44%	Medium	❤
0784	Letter Case Permutation	59%	Easy	❤
0783	Minimum Distance Between BST Nodes	51%	Easy
0782	Transform to Chessboard	39%	Hard
0781	Rabbits in Forest	52%	Medium
0780	Reaching Points	27%	Hard
0779	K-th Symbol in Grammar	37%	Medium
0778	Swim in Rising Water	49%	Hard
0777	Swap Adjacent in LR String	33%	Medium
0775	Global and Local Inversions	39%	Medium
0773	Sliding Puzzle	54%	Hard
0771	Jewels and Stones	83%	Easy
0770	Basic Calculator IV	45%	Hard	❤
0769	Max Chunks To Make Sorted	52%	Medium
0768	Max Chunks To Make Sorted II	46%	Hard
0767	Reorganize String	44%	Medium
0766	Toeplitz Matrix	62%	Easy
0765	Couples Holding Hands	52%	Hard
0764	Largest Plus Sign	44%	Medium
0763	Partition Labels	72%	Medium
0762	Prime Number of Set Bits in Binary Representation	60%	Easy
0761	Special Binary String	52%	Hard
0757	Set Intersection Size At Least Two	37%	Hard
0756	Pyramid Transition Matrix	52%	Medium	❤
0754	Reach a Number	33%	Easy	❤
0753	Cracking the Safe	48%	Hard	❤
0752	Open the Lock	47%	Medium	❤
0749	Contain Virus	41%	Hard
0748	Shortest Completing Word	55%	Easy
0747	Largest Number At Least Twice of Others	40%	Easy
0746	Min Cost Climbing Stairs	48%	Easy
0745	Prefix and Suffix Search	31%	Hard
0744	Find Smallest Letter Greater Than Target	44%	Easy
0743	Network Delay Time	44%	Medium
0741	Cherry Pickup	31%	Hard
0740	Delete and Earn	46%	Medium	❤
0739	Daily Temperatures	60%	Medium	❤
0738	Monotone Increasing Digits	42%	Medium
0736	Parse Lisp Expression	45%	Hard	❤
0735	Asteroid Collision	39%	Medium
0733	Flood Fill	51%	Easy
0732	My Calendar III	56%	Hard
0731	My Calendar II	46%	Medium	❤
0730	Count Different Palindromic Subsequences	40%	Hard	❤
0729	My Calendar I	48%	Medium
0728	Self Dividing Numbers	71%	Easy
0726	Number of Atoms	45%	Hard	❤
0725	Split Linked List in Parts	49%	Medium
0724	Find Pivot Index	42%	Easy
0722	Remove Comments	31%	Medium	❤
0721	Accounts Merge	43%	Medium	❤
0720	Longest Word in Dictionary	46%	Easy
0719	Find K-th Smallest Pair Distance	29%	Hard	❤
0718	Maximum Length of Repeated Subarray	47%	Medium	❤
0717	1-bit and 2-bit Characters	49%	Easy
0715	Range Module	36%	Hard
0714	Best Time to Buy and Sell Stock with Transaction Fee	51%	Medium	❤
0713	Subarray Product Less Than K	37%	Medium	❤
0712	Minimum ASCII Delete Sum for Two Strings	55%	Medium	❤
0710	Random Pick with Blacklist	32%	Hard	❤
0709	To Lower Case	77%	Easy
0707	Design Linked List	20%	Easy	❤
0706	Design HashMap	57%	Easy
0705	Design HashSet	56%	Easy
0704	Binary Search	49%	Easy
0703	Kth Largest Element in a Stream	47%	Easy
0701	Insert into a Binary Search Tree	77%	Medium
0700	Search in a Binary Search Tree	69%	Easy
0699	Falling Squares	40%	Hard
0698	Partition to K Equal Sum Subsets	43%	Medium	❤
0697	Degree of an Array	51%	Easy
0696	Count Binary Substrings	54%	Easy
0695	Max Area of Island	59%	Medium	❤
0693	Binary Number with Alternating Bits	58%	Easy
0692	Top K Frequent Words	47%	Medium
0691	Stickers to Spell Word	39%	Hard	❤
0689	Maximum Sum of 3 Non-Overlapping Subarrays	44%	Hard
0688	Knight Probability in Chessboard	45%	Medium
0687	Longest Univalue Path	34%	Easy
0686	Repeated String Match	31%	Easy	❤
0685	Redundant Connection II	31%	Hard	❤
0684	Redundant Connection	53%	Medium
0682	Baseball Game	61%	Easy
0680	Valid Palindrome II	35%	Easy
0679	24 Game	43%	Hard	❤
0678	Valid Parenthesis String	33%	Medium	❤
0677	Map Sum Pairs	52%	Medium	❤
0676	Implement Magic Dictionary	52%	Medium
0675	Cut Off Trees for Golf Event	32%	Hard	❤
0674	Longest Continuous Increasing Subsequence	44%	Easy
0673	Number of Longest Increasing Subsequence	34%	Medium	❤
0672	Bulb Switcher II	50%	Medium
0671	Second Minimum Node In a Binary Tree	43%	Easy
0670	Maximum Swap	40%	Medium	❤
0669	Trim a Binary Search Tree	61%	Easy
0668	Kth Smallest Number in Multiplication Table	42%	Hard
0667	Beautiful Arrangement II	52%	Medium
0665	Non-decreasing Array	19%	Easy
0664	Strange Printer	37%	Hard	❤
0662	Maximum Width of Binary Tree	39%	Medium
0661	Image Smoother	49%	Easy
0659	Split Array into Consecutive Subsequences	41%	Medium	❤
0658	Find K Closest Elements	38%	Medium	❤
0657	Robot Return to Origin	72%	Easy
0655	Print Binary Tree	52%	Medium
0654	Maximum Binary Tree	77%	Medium	❤
0653	Two Sum IV - Input is a BST	53%	Easy
0652	Find Duplicate Subtrees	47%	Medium
0650	2 Keys Keyboard	47%	Medium
0649	Dota2 Senate	38%	Medium	❤
0648	Replace Words	53%	Medium
0647	Palindromic Substrings	58%	Medium	❤
0646	Maximum Length of Pair Chain	49%	Medium
0645	Set Mismatch	41%	Easy	❤
0643	Maximum Average Subarray I	40%	Easy
0641	Design Circular Deque	49%	Medium	❤
0640	Solve the Equation	40%	Medium
0639	Decode Ways II	25%	Hard
0638	Shopping Offers	49%	Medium	❤
0637	Average of Levels in Binary Tree	59%	Easy
0636	Exclusive Time of Functions	49%	Medium	❤
0633	Sum of Square Numbers	32%	Easy
0632	Smallest Range Covering Elements from K Lists	49%	Hard
0630	Course Schedule III	32%	Hard	❤
0629	K Inverse Pairs Array	29%	Hard
0628	Maximum Product of Three Numbers	46%	Easy	❤
0623	Add One Row to Tree	47%	Medium
0622	Design Circular Queue	41%	Medium
0621	Task Scheduler	46%	Medium	❤
0617	Merge Two Binary Trees	71%	Easy
0611	Valid Triangle Number	46%	Medium	❤
0609	Find Duplicate File in System	56%	Medium
0606	Construct String from Binary Tree	52%	Easy
0605	Can Place Flowers	31%	Easy	❤
0600	Non-negative Integers without Consecutive Ones	33%	Hard	❤
0599	Minimum Index Sum of Two Lists	48%	Easy
0598	Range Addition II	49%	Easy
0594	Longest Harmonious Subsequence	44%	Easy
0593	Valid Square	41%	Medium
0592	Fraction Addition and Subtraction	47%	Medium
0591	Tag Validator	33%	Hard	❤
0587	Erect the Fence	34%	Hard	❤
0583	Delete Operation for Two Strings	45%	Medium	❤
0581	Shortest Unsorted Continuous Subarray	30%	Easy	❤
0576	Out of Boundary Paths	32%	Medium	❤
0575	Distribute Candies	60%	Easy
0572	Subtree of Another Tree	42%	Easy	❤
0567	Permutation in String	39%	Medium
0566	Reshape the Matrix	59%	Easy
0565	Array Nesting	53%	Medium
0564	Find the Closest Palindrome	19%	Hard
0563	Binary Tree Tilt	47%	Easy
0561	Array Partition I	70%	Easy
0560	Subarray Sum Equals K	42%	Medium	❤
0557	Reverse Words in a String III	65%	Easy
0556	Next Greater Element III	30%	Medium
0554	Brick Wall	48%	Medium
0553	Optimal Division	55%	Medium
0552	Student Attendance Record II	34%	Hard	❤
0551	Student Attendance Record I	45%	Easy
0547	Friend Circles	55%	Medium	❤
0546	Remove Boxes	39%	Hard	❤
0543	Diameter of Binary Tree	47%	Easy
0542	01 Matrix	37%	Medium	❤
0541	Reverse String II	46%	Easy
0540	Single Element in a Sorted Array	57%	Medium
0539	Minimum Time Difference	49%	Medium
0538	Convert BST to Greater Tree	52%	Easy
0537	Complex Number Multiplication	66%	Medium
0532	K-diff Pairs in an Array	30%	Easy
0530	Minimum Absolute Difference in BST	51%	Easy	❤
0529	Minesweeper	54%	Medium
0528	Random Pick with Weight	43%	Medium
0526	Beautiful Arrangement	55%	Medium	❤
0525	Contiguous Array	43%	Medium	❤
0524	Longest Word in Dictionary through Deleting	46%	Medium
0523	Continuous Subarray Sum	24%	Medium	❤
0522	Longest Uncommon Subsequence II	33%	Medium
0521	Longest Uncommon Subsequence I	56%	Easy
0520	Detect Capital	52%	Easy
0519	Random Flip Matrix	33%	Medium
0518	Coin Change 2	44%	Medium	❤
0517	Super Washing Machines	37%	Hard	❤
0516	Longest Palindromic Subsequence	48%	Medium	❤
0515	Find Largest Value in Each Tree Row	58%	Medium
0514	Freedom Trail	41%	Hard
0513	Find Bottom Left Tree Value	59%	Medium
0509	Fibonacci Number	66%	Easy
0508	Most Frequent Subtree Sum	55%	Medium
0507	Perfect Number	34%	Easy
0506	Relative Ranks	49%	Easy
0504	Base 7	45%	Easy
0503	Next Greater Element II	52%	Medium	❤
0502	IPO	38%	Hard
0501	Find Mode in Binary Search Tree	40%	Easy	❤
0500	Keyboard Row	62%	Easy
0498	Diagonal Traverse	46%	Medium
0497	Random Point in Non-overlapping Rectangles	36%	Medium
0496	Next Greater Element I	60%	Easy
0495	Teemo Attacking	52%	Medium
0494	Target Sum	45%	Medium	❤
0493	Reverse Pairs	23%	Hard
0492	Construct the Rectangle	48%	Easy	❤
0491	Increasing Subsequences	42%	Medium	❤
0488	Zuma Game	39%	Hard	❤
0486	Predict the Winner	47%	Medium
0485	Max Consecutive Ones	55%	Easy
0483	Smallest Good Base	34%	Hard	❤
0482	License Key Formatting	41%	Easy
0481	Magical String	46%	Medium
0480	Sliding Window Median	34%	Hard	❤
0479	Largest Palindrome Product	27%	Hard
0478	Generate Random Point in a Circle	37%	Medium
0477	Total Hamming Distance	49%	Medium	❤
0476	Number Complement	62%	Easy
0475	Heaters	32%	Easy
0474	Ones and Zeroes	40%	Medium
0473	Matchsticks to Square	36%	Medium	❤
0472	Concatenated Words	37%	Hard
0470	Implement Rand10() Using Rand7()	45%	Medium	❤
0468	Validate IP Address	21%	Medium
0467	Unique Substrings in Wraparound String	34%	Medium	❤
0466	Count The Repetitions	27%	Hard	❤
0464	Can I Win	28%	Medium	❤
0463	Island Perimeter	61%	Easy
0462	Minimum Moves to Equal Array Elements II	52%	Medium
0461	Hamming Distance	70%	Easy
0460	LFU Cache	30%	Hard
0459	Repeated Substring Pattern	40%	Easy	❤
0458	Poor Pigs	46%	Hard
0457	Circular Array Loop	28%	Medium
0456	132 Pattern	27%	Medium	❤
0455	Assign Cookies	48%	Easy
0454	4Sum II	51%	Medium
0453	Minimum Moves to Equal Array Elements	49%	Easy
0452	Minimum Number of Arrows to Burst Balloons	47%	Medium
0451	Sort Characters By Frequency	57%	Medium
0450	Delete Node in a BST	40%	Medium	❤
0448	Find All Numbers Disappeared in an Array	54%	Easy
0447	Number of Boomerangs	50%	Easy
0446	Arithmetic Slices II - Subsequence	31%	Hard	❤
0445	Add Two Numbers II	51%	Medium	❤
0443	String Compression	38%	Easy	❤
0442	Find All Duplicates in an Array	62%	Medium
0441	Arranging Coins	38%	Easy
0440	K-th Smallest in Lexicographical Order	27%	Hard	❤
0438	Find All Anagrams in a String	38%	Medium
0437	Path Sum III	43%	Easy	❤
0436	Find Right Interval	43%	Medium
0435	Non-overlapping Intervals	41%	Medium	❤
0434	Number of Segments in a String	37%	Easy
0433	Minimum Genetic Mutation	39%	Medium
0432	All O`one Data Structure	30%	Hard	❤
0424	Longest Repeating Character Replacement	44%	Medium	❤
0423	Reconstruct Original Digits from English	46%	Medium
0421	Maximum XOR of Two Numbers in an Array	51%	Medium	❤
0420	Strong Password Checker	16%	Hard	❤
0419	Battleships in a Board	66%	Medium
0417	Pacific Atlantic Water Flow	38%	Medium
0416	Partition Equal Subset Sum	41%	Medium	❤
0415	Add Strings	44%	Easy
0414	Third Maximum Number	29%	Easy
0413	Arithmetic Slices	56%	Medium
0412	Fizz Buzz	60%	Easy
0410	Split Array Largest Sum	43%	Hard
0409	Longest Palindrome	48%	Easy
0407	Trapping Rain Water II	40%	Hard
0406	Queue Reconstruction by Height	61%	Medium	❤
0405	Convert a Number to Hexadecimal	42%	Easy
0404	Sum of Left Leaves	49%	Easy
0403	Frog Jump	37%	Hard	❤
0402	Remove K Digits	27%	Medium	❤
0401	Binary Watch	45%	Easy
0400	Nth Digit	30%	Medium	❤
0399	Evaluate Division	48%	Medium	❤
0398	Random Pick Index	51%	Medium
0397	Integer Replacement	31%	Medium	❤
0396	Rotate Function	35%	Medium	❤
0395	Longest Substring with At Least K Repeating Characters	39%	Medium
0394	Decode String	46%	Medium
0393	UTF-8 Validation	36%	Medium	❤
0392	Is Subsequence	47%	Easy	❤
0391	Perfect Rectangle	28%	Hard
0390	Elimination Game	43%	Medium	❤
0389	Find the Difference	53%	Easy
0388	Longest Absolute File Path	39%	Medium
0387	First Unique Character in a String	50%	Easy
0386	Lexicographical Numbers	48%	Medium
0385	Mini Parser	32%	Medium	❤
0384	Shuffle an Array	50%	Medium	❤
0383	Ransom Note	50%	Easy
0382	Linked List Random Node	50%	Medium
0381	Insert Delete GetRandom O(1) - Duplicates allowed	32%	Hard	❤
0380	Insert Delete GetRandom O(1)	43%	Medium	❤
0378	Kth Smallest Element in a Sorted Matrix	50%	Medium	❤
0377	Combination Sum IV	44%	Medium
0376	Wiggle Subsequence	38%	Medium	❤
0375	Guess Number Higher or Lower II	38%	Medium
0373	Find K Pairs with Smallest Sums	34%	Medium	❤
0372	Super Pow	35%	Medium
0371	Sum of Two Integers	50%	Easy	❤
0368	Largest Divisible Subset	35%	Medium	❤
0367	Valid Perfect Square	40%	Easy
0365	Water and Jug Problem	29%	Medium	❤
0363	Max Sum of Rectangle No Larger Than K	35%	Hard	❤
0357	Count Numbers with Unique Digits	47%	Medium	❤
0355	Design Twitter	28%	Medium	❤
0354	Russian Doll Envelopes	34%	Hard	❤
0352	Data Stream as Disjoint Intervals	44%	Hard
0350	Intersection of Two Arrays II	49%	Easy	❤
0349	Intersection of Two Arrays	57%	Easy
0347	Top K Frequent Elements	56%	Medium
0345	Reverse Vowels of a String	42%	Easy
0344	Reverse String	64%	Easy
0343	Integer Break	48%	Medium
0342	Power of Four	40%	Easy
0338	Counting Bits	65%	Medium
0337	House Robber III	48%	Medium	❤
0336	Palindrome Pairs	32%	Hard	❤
0335	Self Crossing	27%	Hard
0334	Increasing Triplet Subsequence	39%	Medium	❤
0332	Reconstruct Itinerary	32%	Medium	❤
0331	Verify Preorder Serialization of a Binary Tree	39%	Medium	❤
0330	Patching Array	33%	Hard
0329	Longest Increasing Path in a Matrix	41%	Hard	❤
0328	Odd Even Linked List	50%	Medium	❤
0327	Count of Range Sum	33%	Hard	❤
0326	Power of Three	41%	Easy	❤
0324	Wiggle Sort II	28%	Medium
0322	Coin Change	32%	Medium	❤
0321	Create Maximum Number	25%	Hard	❤
0319	Bulb Switcher	44%	Medium	❤
0318	Maximum Product of Word Lengths	49%	Medium	❤
0316	Remove Duplicate Letters	33%	Hard	❤
0315	Count of Smaller Numbers After Self	39%	Hard
0313	Super Ugly Number	42%	Medium	❤
0312	Burst Balloons	48%	Hard	❤
0310	Minimum Height Trees	30%	Medium
0309	Best Time to Buy and Sell Stock with Cooldown	44%	Medium	❤
0307	Range Sum Query - Mutable	30%	Medium
0306	Additive Number	28%	Medium
0304	Range Sum Query 2D - Immutable	34%	Medium
0303	Range Sum Query - Immutable	40%	Easy
0301	Remove Invalid Parentheses	40%	Hard	❤
0300	Longest Increasing Subsequence	41%	Medium	❤
0299	Bulls and Cows	40%	Easy
0295	Find Median from Data Stream	39%	Hard	❤
0292	Nim Game	55%	Easy	❤
0290	Word Pattern	35%	Easy
0289	Game of Life	48%	Medium	❤
0287	Find the Duplicate Number	51%	Medium	❤
0283	Move Zeroes	55%	Easy
0282	Expression Add Operators	33%	Hard	❤
0279	Perfect Squares	43%	Medium	❤
0275	H-Index II	35%	Medium	❤
0274	H-Index	34%	Medium
0273	Integer to English Words	25%	Hard	❤
0268	Missing Number	49%	Easy
0264	Ugly Number II	37%	Medium	❤
0263	Ugly Number	40%	Easy
0260	Single Number III	58%	Medium	❤
0258	Add Digits	54%	Easy
0257	Binary Tree Paths	47%	Easy
0242	Valid Anagram	53%	Easy
0241	Different Ways to Add Parentheses	51%	Medium
0240	Search a 2D Matrix II	41%	Medium	❤
0239	Sliding Window Maximum	39%	Hard	❤
0238	Product of Array Except Self	56%	Medium
0237	Delete Node in a Linked List	55%	Easy	❤
0236	Lowest Common Ancestor of a Binary Tree	40%	Medium	❤
0235	Lowest Common Ancestor of a Binary Search Tree	46%	Easy	❤
0234	Palindrome Linked List	37%	Easy
0233	Number of Digit One	30%	Hard	❤
0232	Implement Queue using Stacks	45%	Easy
0231	Power of Two	42%	Easy
0230	Kth Smallest Element in a BST	53%	Medium
0229	Majority Element II	33%	Medium	❤
0228	Summary Ranges	37%	Medium
0227	Basic Calculator II	34%	Medium
0226	Invert Binary Tree	59%	Easy
0225	Implement Stack using Queues	41%	Easy
0224	Basic Calculator	34%	Hard
0223	Rectangle Area	36%	Medium
0222	Count Complete Tree Nodes	37%	Medium
0221	Maximal Square	34%	Medium	❤
0220	Contains Duplicate III	20%	Medium	❤
0219	Contains Duplicate II	36%	Easy
0218	The Skyline Problem	32%	Hard	❤
0217	Contains Duplicate	53%	Easy
0216	Combination Sum III	53%	Medium
0215	Kth Largest Element in an Array	50%	Medium	❤
0214	Shortest Palindrome	28%	Hard	❤
0213	House Robber II	35%	Medium
0212	Word Search II	30%	Hard	❤
0211	Add and Search Word - Data structure design	32%	Medium	❤
0210	Course Schedule II	36%	Medium
0209	Minimum Size Subarray Sum	35%	Medium
0208	Implement Trie (Prefix Tree)	41%	Medium	❤
0207	Course Schedule	39%	Medium	❤
0206	Reverse Linked List	57%	Easy
0205	Isomorphic Strings	38%	Easy	❤
0204	Count Primes	29%	Easy	❤
0203	Remove Linked List Elements	36%	Easy
0202	Happy Number	46%	Easy
0201	Bitwise AND of Numbers Range	36%	Medium	❤
0200	Number of Islands	43%	Medium
0199	Binary Tree Right Side View	49%	Medium
0198	House Robber	41%	Easy	❤
0191	Number of 1 Bits	45%	Easy
0190	Reverse Bits	33%	Easy
0189	Rotate Array	31%	Easy
0188	Best Time to Buy and Sell Stock IV	26%	Hard	❤
0187	Repeated DNA Sequences	37%	Medium
0179	Largest Number	26%	Medium	❤
0174	Dungeon Game	28%	Hard	❤
0173	Binary Search Tree Iterator	50%	Medium	❤
0172	Factorial Trailing Zeroes	37%	Easy
0171	Excel Sheet Column Number	52%	Easy
0169	Majority Element	54%	Easy	❤
0168	Excel Sheet Column Title	29%	Easy	❤
0167	Two Sum II - Input array is sorted	51%	Easy
0166	Fraction to Recurring Decimal	20%	Medium	❤
0165	Compare Version Numbers	24%	Medium
0164	Maximum Gap	33%	Hard
0162	Find Peak Element	41%	Medium
0160	Intersection of Two Linked Lists	35%	Easy
0155	Min Stack	39%	Easy
0154	Find Minimum in Rotated Sorted Array II	39%	Hard
0153	Find Minimum in Rotated Sorted Array	43%	Medium
0152	Maximum Product Subarray	30%	Medium	❤
0150	Evaluate Reverse Polish Notation	33%	Medium
0149	Max Points on a Line	16%	Hard	❤
0148	Sort List	37%	Medium	❤
0147	Insertion Sort List	38%	Medium	❤
0146	LRU Cache	27%	Medium	❤
0145	Binary Tree Postorder Traversal	50%	Hard
0144	Binary Tree Preorder Traversal	52%	Medium	❤
0143	Reorder List	32%	Medium	❤
0142	Linked List Cycle II	33%	Medium	❤
0141	Linked List Cycle	38%	Easy
0140	Word Break II	28%	Hard	❤
0139	Word Break	36%	Medium	❤
0137	Single Number II	47%	Medium
0136	Single Number	61%	Easy
0135	Candy	29%	Hard
0134	Gas Station	35%	Medium	❤
0132	Palindrome Partitioning II	28%	Hard	❤
0131	Palindrome Partitioning	42%	Medium	❤
0130	Surrounded Regions	24%	Medium	❤
0129	Sum Root to Leaf Numbers	43%	Medium
0128	Longest Consecutive Sequence	42%	Hard
0127	Word Ladder	25%	Medium	❤
0126	Word Ladder II	19%	Hard	❤
0125	Valid Palindrome	32%	Easy
0124	Binary Tree Maximum Path Sum	31%	Hard	❤
0123	Best Time to Buy and Sell Stock III	35%	Hard
0122	Best Time to Buy and Sell Stock II	53%	Easy
0121	Best Time to Buy and Sell Stock	48%	Easy
0120	Triangle	41%	Medium	❤
0119	Pascal's Triangle II	45%	Easy
0118	Pascal's Triangle	48%	Easy
0115	Distinct Subsequences	35%	Hard	❤
0114	Flatten Binary Tree to Linked List	44%	Medium	❤
0113	Path Sum II	42%	Medium
0112	Path Sum	38%	Easy
0111	Minimum Depth of Binary Tree	35%	Easy
0110	Balanced Binary Tree	41%	Easy
0109	Convert Sorted List to Binary Search Tree	42%	Medium
0108	Convert Sorted Array to Binary Search Tree	53%	Easy
0107	Binary Tree Level Order Traversal II	48%	Easy
0106	Construct Binary Tree from Inorder and Postorder Traversal	41%	Medium	❤
0105	Construct Binary Tree from Preorder and Inorder Traversal	43%	Medium	❤
0104	Maximum Depth of Binary Tree	62%	Easy
0103	Binary Tree Zigzag Level Order Traversal	43%	Medium
0102	Binary Tree Level Order Traversal	50%	Medium
0101	Symmetric Tree	44%	Easy	❤
0100	Same Tree	50%	Easy
0099	Recover Binary Search Tree	35%	Hard	❤
0098	Validate Binary Search Tree	26%	Medium	❤
0097	Interleaving String	29%	Hard	❤
0096	Unique Binary Search Trees	48%	Medium
0095	Unique Binary Search Trees II	37%	Medium	❤
0094	Binary Tree Inorder Traversal	58%	Medium
0093	Restore IP Addresses	32%	Medium	❤
0092	Reverse Linked List II	36%	Medium
0091	Decode Ways	22%	Medium
0090	Subsets II	43%	Medium
0089	Gray Code	46%	Medium
0088	Merge Sorted Array	37%	Easy
0087	Scramble String	32%	Hard	❤
0086	Partition List	38%	Medium
0085	Maximal Rectangle	34%	Hard	❤
0084	Largest Rectangle in Histogram	32%	Hard
0083	Remove Duplicates from Sorted List	43%	Easy
0082	Remove Duplicates from Sorted List II	34%	Medium
0081	Search in Rotated Sorted Array II	32%	Medium
0080	Remove Duplicates from Sorted Array II	41%	Medium
0079	Word Search	32%	Medium
0078	Subsets	55%	Medium
0077	Combinations	50%	Medium
0076	Minimum Window Substring	32%	Hard
0075	Sort Colors	43%	Medium
0074	Search a 2D Matrix	35%	Medium
0073	Set Matrix Zeroes	41%	Medium
0072	Edit Distance	39%	Hard
0071	Simplify Path	29%	Medium
0070	Climbing Stairs	45%	Easy
0069	Sqrt(x)	32%	Easy
0068	Text Justification	24%	Hard
0067	Add Binary	40%	Easy
0066	Plus One	41%	Easy
0065	Valid Number	14%	Hard
0064	Minimum Path Sum	48%	Medium
0063	Unique Paths II	33%	Medium
0062	Unique Paths	49%	Medium
0061	Rotate List	28%	Medium
0060	Permutation Sequence	34%	Medium
0059	Spiral Matrix II	48%	Medium
0058	Length of Last Word	32%	Easy
0057	Insert Interval	31%	Hard
0056	Merge Intervals	36%	Medium
0055	Jump Game	32%	Medium
0054	Spiral Matrix	31%	Medium
0053	Maximum Subarray	44%	Easy
0052	N-Queens II	54%	Hard
0051	N-Queens	41%	Hard
0050	Pow(x, n)	28%	Medium
0049	Group Anagrams	49%	Medium
0048	Rotate Image	50%	Medium
0047	Permutations II	42%	Medium
0046	Permutations	57%	Medium
0045	Jump Game II	28%	Hard
0044	Wildcard Matching	23%	Hard
0043	Multiply Strings	31%	Medium
0042	Trapping Rain Water	45%	Hard
0041	First Missing Positive	29%	Hard
0040	Combination Sum II	43%	Medium
0039	Combination Sum	51%	Medium
0038	Count and Say	41%	Easy
0037	Sudoku Solver	39%	Hard
0036	Valid Sudoku	45%	Medium
0035	Search Insert Position	41%	Easy
0034	Find First and Last Position of Element in Sorted Array	34%	Medium
0033	Search in Rotated Sorted Array	33%	Medium
0032	Longest Valid Parentheses	26%	Hard
0031	Next Permutation	31%	Medium
0030	Substring with Concatenation of All Words	24%	Hard
0029	Divide Two Integers	16%	Medium
0028	Implement strStr()	33%	Easy
0027	Remove Element	45%	Easy
0026	Remove Duplicates from Sorted Array	42%	Easy
0025	Reverse Nodes in k-Group	38%	Hard
0024	Swap Nodes in Pairs	46%	Medium
0023	Merge k Sorted Lists	36%	Hard
0022	Generate Parentheses	57%	Medium
0021	Merge Two Sorted Lists	49%	Easy
0020	Valid Parentheses	37%	Easy
0019	Remove Nth Node From End of List	34%	Medium
0018	4Sum	31%	Medium
0017	Letter Combinations of a Phone Number	43%	Medium
0016	3Sum Closest	45%	Medium
0015	3Sum	24%	Medium
0014	Longest Common Prefix	34%	Easy
0013	Roman to Integer	53%	Easy
0012	Integer to Roman	52%	Medium
0011	Container With Most Water	47%	Medium
0010	Regular Expression Matching	25%	Hard
0009	Palindrome Number	45%	Easy
0008	String to Integer (atoi)	14%	Medium
0007	Reverse Integer	25%	Easy
0006	ZigZag Conversion	33%	Medium
0005	Longest Palindromic Substring	28%	Medium
0004	Median of Two Sorted Arrays	27%	Hard
0003	Longest Substring Without Repeating Characters	28%	Medium
0002	Add Two Numbers	31%	Medium
0001	Two Sum	44%	Easy

以下免费的算法题，暂时不能提交 Go 解答

• 116.Populating Next Right Pointers in Each Node
• 117.Populating Next Right Pointers in Each Node II
• 133.Clone Graph
• 138.Copy List with Random Pointer
• 151.Reverse Words in a String
• 278.First Bad Version
• 284.Peeking Iterator
• 297.Serialize and Deserialize Binary Tree
• 341.Flatten Nested List Iterator
• 374.Guess Number Higher or Lower
• 426.Convert Binary Search Tree to Sorted Doubly Linked List
• 427.Construct Quad Tree
• 429.N-ary Tree Level Order Traversal
• 430.Flatten a Multilevel Doubly Linked List
• 449.Serialize and Deserialize BST
• 535.Encode and Decode TinyURL
• 558.Quad Tree Intersection
• 559.Maximum Depth of N-ary Tree
• 589.N-ary Tree Preorder Traversal
• 590.N-ary Tree Postorder Traversal
• 690.Employee Importance
• 708.Insert into a Cyclic Sorted List

helper

helper 会处理大部分琐碎的工作。

notes

notes 记录了我答题过程中，对知识点的总结。

kit

针对 LeetCode 中经常出现的以下数据结构，在 kit 中进行了定义，并添加了与 []int 相互转换的函数。利用 Go 1.9 添加的 type alias 功能，易于添加单元测试。

• Heap
• Interval
• ListNode
• NestedInteger
• PriorityQueue
• Queue
• Stack
• TreeNode
• Master

致谢

感谢所有贡献者的辛苦付出