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LeetCode Problems' Solutions [话题分类]

#	Title	Solution	Difficulty
980	Unique Paths III	Go	Hard
979	Distribute Coins in Binary Tree	Go	Medium
978	Longest Turbulent Subarray	Go	Medium
977	Squares of a Sorted Array	Go	Easy
976	Largest Perimeter Triangle	Go	Easy
975	Odd Even Jump	Go	Hard
974	Subarray Sums Divisible by K	Go	Medium
973	K Closest Points to Origin	Go	Easy
972	Equal Rational Numbers	Go	Hard
971	Flip Binary Tree To Match Preorder Traversal	Go	Medium
970	Powerful Integers	Go	Easy
969	Pancake Sorting	Go	Medium
968	Binary Tree Cameras	Go	Hard
967	Numbers With Same Consecutive Differences	Go	Medium
966	Vowel Spellchecker	Go	Medium
965	Univalued Binary Tree	Go	Easy
964	Least Operators to Express Number	Go	Hard
963	Minimum Area Rectangle II	Go	Medium
962	Maximum Width Ramp	Go	Medium
961	N-Repeated Element in Size 2N Array	Go	Easy
960	Delete Columns to Make Sorted III	Go	Hard
959	Regions Cut By Slashes	Go	Medium
958	Check Completeness of a Binary Tree	Go	Medium
957	Prison Cells After N Days	Go	Medium
956	Tallest Billboard	Go	Hard
955	Delete Columns to Make Sorted II	Go	Medium
954	Array of Doubled Pairs	Go	Medium
953	Verifying an Alien Dictionary	Go	Easy
952	Largest Component Size by Common Factor	Go	Hard
951	Flip Equivalent Binary Trees	Go	Medium
950	Reveal Cards In Increasing Order	Go	Medium
949	Largest Time for Given Digits	Go	Easy
948	Bag of Tokens	Go	Medium
947	Most Stones Removed with Same Row or Column	Go	Medium
946	Validate Stack Sequences	Go	Medium
945	Minimum Increment to Make Array Unique	Go	Medium
944	Delete Columns to Make Sorted	Go	Easy
943	Find the Shortest Superstring	Go	Hard
942	DI String Match	Go	Easy
941	Valid Mountain Array	Go	Easy
940	Distinct Subsequences II	Go	Hard
939	Minimum Area Rectangle	Go	Medium
938	Range Sum of BST	Go	Medium
937	Reorder Log Files	Go	Easy
936	Stamping The Sequence	Go	Hard
935	Knight Dialer	Go	Medium
934	Shortest Bridge	Go	Medium
933	Number of Recent Calls	Go	Easy
932	Beautiful Array	Go	Medium
931	Minimum Falling Path Sum	Go	Medium
930	Binary Subarrays With Sum	Go	Medium
929	Unique Email Addresses	Go	Easy
928	Minimize Malware Spread II	Go	Hard
927	Three Equal Parts	Go	Hard
926	Flip String to Monotone Increasing	Go	Medium
925	Long Pressed Name	Go	Easy
924	Minimize Malware Spread	Go	Hard
923	3Sum With Multiplicity	Go	Medium
922	Sort Array By Parity II	Go	Easy
921	Minimum Add to Make Parentheses Valid	Go	Medium
920	Number of Music Playlists	Go	Hard
919	Complete Binary Tree Inserter	Go	Medium
918	Maximum Sum Circular Subarray	Go	Medium
917	Reverse Only Letters	Go	Easy
916	Word Subsets	Go	Medium
915	Partition Array into Disjoint Intervals	Go	Medium
914	X of a Kind in a Deck of Cards	Go	Easy
913	Cat and Mouse	Go	Hard
911	Online Election	Go	Medium
910	Smallest Range II	Go	Medium
909	Snakes and Ladders	Go	Medium
908	Smallest Range I	Go	Easy
907	Sum of Subarray Minimums	Go	Medium
906	Super Palindromes	Go	Hard
905	Sort Array By Parity	Go	Easy
904	Fruit Into Baskets	Go	Medium
903	Valid Permutations for DI Sequence	Go	Hard
902	Numbers At Most N Given Digit Set	Go	Hard
901	Online Stock Span	Go	Medium
900	RLE Iterator	Go	Medium
899	Orderly Queue	Go	Hard
898	Bitwise ORs of Subarrays	Go	Medium
897	Increasing Order Search Tree	Go	Easy
896	Monotonic Array	Go	Easy
895	Maximum Frequency Stack	Go	Hard
894	All Possible Full Binary Trees	Go	Medium
893	Groups of Special-Equivalent Strings	Go	Easy
892	Surface Area of 3D Shapes	Go	Easy
891	Sum of Subsequence Widths	Go	Hard
890	Find and Replace Pattern	Go	Medium
889	Construct Binary Tree from Preorder and Postorder Traversal	Go	Medium
888	Fair Candy Swap	Go	Easy
887	Super Egg Drop	Go	Hard
886	Possible Bipartition	Go	Medium
885	Spiral Matrix III	Go	Medium
884	Uncommon Words from Two Sentences	Go	Easy
883	Projection Area of 3D Shapes	Go	Easy
882	Reachable Nodes In Subdivided Graph	Go	Hard
881	Boats to Save People	Go	Medium
880	Decoded String at Index	Go	Medium
879	Profitable Schemes	Go	Hard
878	Nth Magical Number	Go	Hard
877	Stone Game	Go	Medium
876	Middle of the Linked List	Go	Easy
875	Koko Eating Bananas	Go	Medium
874	Walking Robot Simulation	Go	Easy
873	Length of Longest Fibonacci Subsequence	Go	Medium
872	Leaf-Similar Trees	Go	Easy
871	Minimum Number of Refueling Stops	Go	Hard
870	Advantage Shuffle	Go	Medium
869	Reordered Power of 2	Go	Medium
868	Binary Gap	Go	Easy
867	Transpose Matrix	Go	Easy
866	Prime Palindrome	Go	Medium
865	Smallest Subtree with all the Deepest Nodes	Go	Medium
864	Shortest Path to Get All Keys	Go	Hard
863	All Nodes Distance K in Binary Tree	Go	Medium
862	Shortest Subarray with Sum at Least K	Go	Hard
861	Score After Flipping Matrix	Go	Medium
860	Lemonade Change	Go	Easy
859	Buddy Strings	Go	Easy
858	Mirror Reflection	Go	Medium
857	Minimum Cost to Hire K Workers	Go	Hard
856	Score of Parentheses	Go	Medium
855	Exam Room	Go	Medium
854	K-Similar Strings	Go	Hard
853	Car Fleet	Go	Medium
852	Peak Index in a Mountain Array	Go	Easy
851	Loud and Rich	Go	Medium
850	Rectangle Area II	Go	Hard
849	Maximize Distance to Closest Person	Go	Easy
848	Shifting Letters	Go	Medium
847	Shortest Path Visiting All Nodes	Go	Hard
846	Hand of Straights	Go	Medium
845	Longest Mountain in Array	Go	Medium
844	Backspace String Compare	Go	Easy
843	Guess the Word	Go	Hard
842	Split Array into Fibonacci Sequence	Go	Medium
841	Keys and Rooms	Go	Medium
840	Magic Squares In Grid	Go	Easy
839	Similar String Groups	Go	Hard
838	Push Dominoes	Go	Medium
837	New 21 Game	Go	Medium
836	Rectangle Overlap	Go	Easy
835	Image Overlap	Go	Medium
834	Sum of Distances in Tree	Go	Hard
833	Find And Replace in String	Go	Medium
832	Flipping an Image	Go	Easy
831	Masking Personal Information	Go	Medium
830	Positions of Large Groups	Go	Easy
829	Consecutive Numbers Sum	Go	Hard
828	Unique Letter String	Go	Hard
827	Making A Large Island	Go	Hard
826	Most Profit Assigning Work	Go	Medium
825	Friends Of Appropriate Ages	Go	Medium
824	Goat Latin	Go	Easy
823	Binary Trees With Factors	Go	Medium
822	Card Flipping Game	Go	Medium
821	Shortest Distance to a Character	Go	Easy
820	Short Encoding of Words	Go	Medium
819	Most Common Word	Go	Easy
818	Race Car	Go	Hard
817	Linked List Components	Go	Medium
816	Ambiguous Coordinates	Go	Medium
815	Bus Routes	Go	Hard
814	Binary Tree Pruning	Go	Medium
813	Largest Sum of Averages	Go	Medium
812	Largest Triangle Area	Go	Easy
811	Subdomain Visit Count	Go	Easy
810	Chalkboard XOR Game	Go	Hard
809	Expressive Words	Go	Medium
808	Soup Servings	Go	Medium
807	Max Increase to Keep City Skyline	Go	Medium
806	Number of Lines To Write String	Go	Easy
805	Split Array With Same Average	Go	Hard
804	Unique Morse Code Words	Go	Easy
803	Bricks Falling When Hit	Go	Hard
802	Find Eventual Safe States	Go	Medium
801	Minimum Swaps To Make Sequences Increasing	Go	Medium
800	Similar RGB Color 🔒	Go	Easy
799	Champagne Tower	Go	Medium
798	Smallest Rotation with Highest Score	Go	Hard
797	All Paths From Source to Target	Go	Medium
796	Rotate String	Go	Easy
795	Number of Subarrays with Bounded Maximum	Go	Medium
794	Valid Tic-Tac-Toe State	Go	Medium
793	Preimage Size of Factorial Zeroes Function	Go	Hard
792	Number of Matching Subsequences	Go	Medium
791	Custom Sort String	Go	Medium
790	Domino and Tromino Tiling	Go	Medium
789	Escape The Ghosts	Go	Medium
788	Rotated Digits	Go	Easy
787	Cheapest Flights Within K Stops	Go	Medium
786	K-th Smallest Prime Fraction	Go	Hard
785	Is Graph Bipartite?	Go	Medium
784	Letter Case Permutation	Go	Easy
783	Minimum Distance Between BST Nodes	Go	Easy
782	Transform to Chessboard	Go	Hard
781	Rabbits in Forest	Go	Medium
780	Reaching Points	Go	Hard
779	K-th Symbol in Grammar	Go	Medium
778	Swim in Rising Water	Go	Hard
777	Swap Adjacent in LR String	Go	Medium
776	Split BST 🔒	Go	Medium
775	Global and Local Inversions	Go	Medium
774	Minimize Max Distance to Gas Station 🔒	Go	Hard
773	Sliding Puzzle	Go	Hard
772	Basic Calculator III 🔒	Go	Hard
771	Jewels and Stones	Go	Easy
770	Basic Calculator IV	Go	Hard
769	Max Chunks To Make Sorted	Go	Medium
768	Max Chunks To Make Sorted II	Go	Hard
767	Reorganize String	Go	Medium
766	Toeplitz Matrix	Go	Easy
765	Couples Holding Hands	Go	Hard
764	Largest Plus Sign	Go	Medium
763	Partition Labels	Go	Medium
762	Prime Number of Set Bits in Binary Representation	Go	Easy
761	Special Binary String	Go	Hard
760	Find Anagram Mappings 🔒	Go	Easy
759	Employee Free Time 🔒	Go	Hard
758	Bold Words in String 🔒	Go	Easy
757	Set Intersection Size At Least Two	Go	Hard
756	Pyramid Transition Matrix	Go	Medium
755	Pour Water 🔒	Go	Medium
754	Reach a Number	Go	Easy
753	Cracking the Safe	Go	Hard
752	Open the Lock	Go	Medium
751	IP to CIDR 🔒	Go	Easy
750	Number Of Corner Rectangles 🔒	Go	Medium
749	Contain Virus	Go	Hard
748	Shortest Completing Word	Go	Easy
747	Largest Number At Least Twice of Others	Go	Easy
746	Min Cost Climbing Stairs	Go	Easy
745	Prefix and Suffix Search	Go	Hard
744	Find Smallest Letter Greater Than Target	Go	Easy
743	Network Delay Time	Go	Easy
742	Closest Leaf in a Binary Tree 🔒	Go	Medium
741	Cherry Pickup	Go	Hard
740	Delete and Earn	Go	Medium
739	Daily Temperatures	Go	Medium
738	Monotone Increasing Digits	Go	Medium
737	Sentence Similarity II 🔒	Go	Medium
736	Parse Lisp Expression	Go	Hard
735	Asteroid Collision	Go	Medium
734	Sentence Similarity 🔒	Go	Easy
733	Flood Fill	Go	Easy
732	My Calendar III	Go	Hard
731	My Calendar II	Go	Medium
730	Count Different Palindromic Subsequences	Go	Hard
729	My Calendar I	Go	Medium
728	Self Dividing Numbers	Go	Easy
727	Minimum Window Subsequence 🔒	Go	Hard
726	Number of Atoms	Go	Hard
725	Split Linked List in Parts	Go	Medium
724	Find Pivot Index	Go	Easy
723	Candy Crush 🔒	Go	Medium
722	Remove Comments	Go	Medium
721	Accounts Merge	Go	Medium
720	Longest Word in Dictionary	Go	Easy
719	Find K-th Smallest Pair Distance	Go	Hard
718	Maximum Length of Repeated Subarray	Go	Medium
717	1-bit and 2-bit Characters	Go	Easy
716	Max Stack 🔒	Go	Easy
715	Range Module	Go	Hard
714	Best Time to Buy and Sell Stock with Transaction Fee	Go	Medium
713	Subarray Product Less Than K	Go	Medium
712	Minimum ASCII Delete Sum for Two Strings	Go	Medium
711	Number of Distinct Islands II 🔒	Go	Hard
710	Random Pick with Blacklist	Go	Hard
709	To Lower Case	Go	Easy
708	Insert into a Cyclic Sorted List 🔒	Go	Medium
707	Design Linked List	Go	Easy
706	Design HashMap	Go	Easy
705	Design HashSet	Go	Easy
704	Binary Search	Go	Easy
703	Kth Largest Element in a Stream	Go	Easy
702	Search in a Sorted Array of Unknown Size 🔒	Go	Medium
701	Insert into a Binary Search Tree	Go	Medium
700	Search in a Binary Search Tree	Go	Easy
699	Falling Squares	Go	Hard
698	Partition to K Equal Sum Subsets	Go	Medium
697	Degree of an Array	Go	Easy
696	Count Binary Substrings	Go	Easy
695	Max Area of Island	Go	Medium
694	Number of Distinct Islands 🔒	Go	Medium
693	Binary Number with Alternating Bits	Go	Easy
692	Top K Frequent Words	Go	Medium
691	Stickers to Spell Word	Go	Hard
690	Employee Importance	Go	Easy
689	Maximum Sum of 3 Non-Overlapping Subarrays	Go	Hard
688	Knight Probability in Chessboard	Go	Medium
687	Longest Univalue Path	Go	Easy
686	Repeated String Match	Go	Easy
685	Redundant Connection II	Go	Hard
684	Redundant Connection	Go	Medium
683	K Empty Slots 🔒	Go	Hard
682	Baseball Game	Go	Easy
681	Next Closest Time 🔒	Go	Medium
680	Valid Palindrome II	Go	Easy
679	24 Game	Go	Hard
678	Valid Parenthesis String	Go	Medium
677	Map Sum Pairs	Go	Medium
676	Implement Magic Dictionary	Go	Medium
675	Cut Off Trees for Golf Event	Go	Hard
674	Longest Continuous Increasing Subsequence	Go	Easy
673	Number of Longest Increasing Subsequence	Go	Medium
672	Bulb Switcher II	Go	Medium
671	Second Minimum Node In a Binary Tree	Go	Easy
670	Maximum Swap	Go	Medium
669	Trim a Binary Search Tree	Go	Easy
668	Kth Smallest Number in Multiplication Table	Go	Hard
667	Beautiful Arrangement II	Go	Medium
666	Path Sum IV 🔒	Go	Medium
665	Non-decreasing Array	Go	Easy
664	Strange Printer	Go	Hard
663	Equal Tree Partition 🔒	Go	Medium
662	Maximum Width of Binary Tree	Go	Medium
661	Image Smoother	Go	Easy
660	Remove 9 🔒	Go	Hard
659	Split Array into Consecutive Subsequences	Go	Medium
658	Find K Closest Elements	Go	Medium
657	Robot Return to Origin	Go	Easy
656	Coin Path 🔒	Go	Hard
655	Print Binary Tree	Go	Medium
654	Maximum Binary Tree	Go	Medium
653	Two Sum IV - Input is a BST	Go	Easy
652	Find Duplicate Subtrees	Go	Medium
651	4 Keys Keyboard 🔒	Go	Medium
650	2 Keys Keyboard	Go	Medium
649	Dota2 Senate	Go	Medium
648	Replace Words	Go	Medium
647	Palindromic Substrings	Go	Medium
646	Maximum Length of Pair Chain	Go	Medium
645	Set Mismatch	Go	Easy
644	Maximum Average Subarray II 🔒	Go	Hard
643	Maximum Average Subarray I	Go	Easy
642	Design Search Autocomplete System 🔒	Go	Hard
641	Design Circular Deque	Go	Medium
640	Solve the Equation	Go	Medium
639	Decode Ways II	Go	Hard
638	Shopping Offers	Go	Medium
637	Average of Levels in Binary Tree	Go	Easy
636	Exclusive Time of Functions	Go	Medium
635	Design Log Storage System 🔒	Go	Medium
634	Find the Derangement of An Array 🔒	Go	Medium
633	Sum of Square Numbers	Go	Easy
632	Smallest Range	Go	Hard
631	Design Excel Sum Formula 🔒	Go	Hard
630	Course Schedule III	Go	Hard
629	K Inverse Pairs Array	Go	Hard
628	Maximum Product of Three Numbers	Go	Easy
627	Swap Salary	MySQL	Easy
626	Exchange Seats	MySQL	Medium
625	Minimum Factorization 🔒	Go	Medium
624	Maximum Distance in Arrays 🔒	Go	Easy
623	Add One Row to Tree	Go	Medium
622	Design Circular Queue	Go	Medium
621	Task Scheduler	Go	Medium
620	Not Boring Movies	MySQL	Easy
619	Biggest Single Number 🔒	Go	Easy
618	Students Report By Geography 🔒	Go	Hard
617	Merge Two Binary Trees	Go	Easy
616	Add Bold Tag in String 🔒	Go	Medium
615	Average Salary: Departments VS Company 🔒	Go	Hard
614	Second Degree Follower 🔒	Go	Medium
613	Shortest Distance in a Line 🔒	Go	Easy
612	Shortest Distance in a Plane 🔒	Go	Medium
611	Valid Triangle Number	Go	Medium
610	Triangle Judgement 🔒	Go	Easy
609	Find Duplicate File in System	Go	Medium
608	Tree Node 🔒	Go	Medium
607	Sales Person 🔒	Go	Easy
606	Construct String from Binary Tree	Go	Easy
605	Can Place Flowers	Go	Easy
604	Design Compressed String Iterator 🔒	Go	Easy
603	Consecutive Available Seats 🔒	Go	Easy
602	Friend Requests II: Who Has the Most Friends 🔒	Go	Medium
601	Human Traffic of Stadium	MySQL	Hard
600	Non-negative Integers without Consecutive Ones	Go	Hard
599	Minimum Index Sum of Two Lists	Go	Easy
598	Range Addition II	Go	Easy
597	Friend Requests I: Overall Acceptance Rate 🔒	Go	Easy
596	Classes More Than 5 Students	MySQL	Easy
595	Big Countries	MySQL	Easy
594	Longest Harmonious Subsequence	Go	Easy
593	Valid Square	Go	Medium
592	Fraction Addition and Subtraction	Go	Medium
591	Tag Validator	Go	Hard
590	N-ary Tree Postorder Traversal	Go	Easy
589	N-ary Tree Preorder Traversal	Go	Easy
588	Design In-Memory File System 🔒	Go	Hard
587	Erect the Fence	Go	Hard
586	Customer Placing the Largest Number of Orders 🔒	Go	Easy
585	Investments in 2016 🔒	Go	Medium
584	Find Customer Referee 🔒	Go	Easy
583	Delete Operation for Two Strings	Go	Medium
582	Kill Process 🔒	Go	Medium
581	Shortest Unsorted Continuous Subarray	Go	Easy
580	Count Student Number in Departments 🔒	Go	Medium
579	Find Cumulative Salary of an Employee 🔒	Go	Hard
578	Get Highest Answer Rate Question 🔒	Go	Medium
577	Employee Bonus 🔒	Go	Easy
576	Out of Boundary Paths	Go	Medium
575	Distribute Candies	Go	Easy
574	Winning Candidate 🔒	Go	Medium
573	Squirrel Simulation 🔒	Go	Medium
572	Subtree of Another Tree	Go	Easy
571	Find Median Given Frequency of Numbers 🔒	Go	Hard
570	Managers with at Least 5 Direct Reports 🔒	Go	Medium
569	Median Employee Salary 🔒	Go	Hard
568	Maximum Vacation Days 🔒	Go	Hard
567	Permutation in String	Go	Medium
566	Reshape the Matrix	Go	Easy
565	Array Nesting	Go	Medium
564	Find the Closest Palindrome	Go	Hard
563	Binary Tree Tilt	Go	Easy
562	Longest Line of Consecutive One in Matrix 🔒	Go	Medium
561	Array Partition I	Go	Easy
560	Subarray Sum Equals K	Go	Medium
559	Maximum Depth of N-ary Tree	Go	Easy
558	Quad Tree Intersection	Go	Easy
557	Reverse Words in a String III	Go	Easy
556	Next Greater Element III	Go	Medium
555	Split Concatenated Strings 🔒	Go	Medium
554	Brick Wall	Go	Medium
553	Optimal Division	Go	Medium
552	Student Attendance Record II	Go	Hard
551	Student Attendance Record I	Go	Easy
549	Binary Tree Longest Consecutive Sequence II 🔒	Go	Medium
548	Split Array with Equal Sum 🔒	Go	Medium
547	Friend Circles	Go	Medium
546	Remove Boxes	Go	Hard
545	Boundary of Binary Tree 🔒	Go	Medium
544	Output Contest Matches 🔒	Go	Medium
543	Diameter of Binary Tree	Go	Easy
542	01 Matrix	Go	Medium
541	Reverse String II	Go	Easy
540	Single Element in a Sorted Array	Go	Medium
539	Minimum Time Difference	Go	Medium
538	Convert BST to Greater Tree	Go	Easy
537	Complex Number Multiplication	Go	Medium
536	Construct Binary Tree from String 🔒	Go	Medium
535	Encode and Decode TinyURL	Go	Medium
533	Lonely Pixel II 🔒	Go	Medium
532	K-diff Pairs in an Array	Go	Easy
531	Lonely Pixel I 🔒	Go	Medium
530	Minimum Absolute Difference in BST	Go	Easy
529	Minesweeper	Go	Medium
528	Random Pick with Weight	Go	Medium
527	Word Abbreviation 🔒	Go	Hard
526	Beautiful Arrangement	Go	Medium
525	Contiguous Array	Go	Medium
524	Longest Word in Dictionary through Deleting	Go	Medium
523	Continuous Subarray Sum	Go	Medium
522	Longest Uncommon Subsequence II	Go	Medium
521	Longest Uncommon Subsequence I	Go	Easy
520	Detect Capital	Go	Easy
519	Random Flip Matrix	Go	Medium
518	Coin Change 2	Go	Medium
517	Super Washing Machines	Go	Hard
516	Longest Palindromic Subsequence	Go	Medium
515	Find Largest Value in Each Tree Row	Go	Medium
514	Freedom Trail	Go	Hard
513	Find Bottom Left Tree Value	Go	Medium
509	Fibonacci Number	Go	Easy
508	Most Frequent Subtree Sum	Go	Medium
507	Perfect Number	Go	Easy
506	Relative Ranks	Go	Easy
505	The Maze II 🔒	Go	Medium
504	Base 7	Go	Easy
503	Next Greater Element II	Go	Medium
502	IPO	Go	Hard
501	Find Mode in Binary Search Tree	Go	Easy
500	Keyboard Row	Go	Easy
499	The Maze III 🔒	Go	Hard
498	Diagonal Traverse	Go	Medium
497	Random Point in Non-overlapping Rectangles	Go	Medium
496	Next Greater Element I	Go	Easy
495	Teemo Attacking	Go	Medium
494	Target Sum	Go	Medium
493	Reverse Pairs	Go	Hard
492	Construct the Rectangle	Go	Easy
491	Increasing Subsequences	Go	Medium
490	The Maze 🔒	Go	Medium
489	Robot Room Cleaner 🔒	Go	Hard
488	Zuma Game	Go	Hard
487	Max Consecutive Ones II 🔒	Go	Medium
486	Predict the Winner	Go	Medium
485	Max Consecutive Ones	Go	Easy
484	Find Permutation 🔒	Go	Medium
483	Smallest Good Base	Go	Hard
482	License Key Formatting	Go	Easy
481	Magical String	Go	Medium
480	Sliding Window Median	Go	Hard
479	Largest Palindrome Product	Go	Hard
478	Generate Random Point in a Circle	Go	Medium
477	Total Hamming Distance	Go	Medium
476	Number Complement	Go	Easy
475	Heaters	Go	Easy
474	Ones and Zeroes	Go	Medium
473	Matchsticks to Square	Go	Medium
472	Concatenated Words	Go	Hard
471	Encode String with Shortest Length 🔒	Go	Hard
470	Implement Rand10() Using Rand7()	Go	Medium
469	Convex Polygon 🔒	Go	Medium
468	Validate IP Address	Go	Medium
467	Unique Substrings in Wraparound String	Go	Medium
466	Count The Repetitions	Go	Hard
465	Optimal Account Balancing 🔒	Go	Hard
464	Can I Win	Go	Medium
463	Island Perimeter	Go	Easy
462	Minimum Moves to Equal Array Elements II	Go	Medium
461	Hamming Distance	Go	Easy
460	LFU Cache	Go	Hard
459	Repeated Substring Pattern	Go	Easy
458	Poor Pigs	Go	Easy
457	Circular Array Loop	Go	Medium
456	132 Pattern	Go	Medium
455	Assign Cookies	Go	Easy
454	4Sum II	Go	Medium
453	Minimum Moves to Equal Array Elements	Go	Easy
452	Minimum Number of Arrows to Burst Balloons	Go	Medium
451	Sort Characters By Frequency	Go	Medium
450	Delete Node in a BST	Go	Medium
449	Serialize and Deserialize BST	Go	Medium
448	Find All Numbers Disappeared in an Array	Go	Easy
447	Number of Boomerangs	Go	Easy
446	Arithmetic Slices II - Subsequence	Go	Hard
445	Add Two Numbers II	Go	Medium
444	Sequence Reconstruction 🔒	Go	Medium
443	String Compression	Go	Easy
442	Find All Duplicates in an Array	Go	Medium
441	Arranging Coins	Go	Easy
440	K-th Smallest in Lexicographical Order	Go	Hard
439	Ternary Expression Parser 🔒	Go	Medium
438	Find All Anagrams in a String	Go	Easy
437	Path Sum III	Go	Easy
436	Find Right Interval	Go	Medium
435	Non-overlapping Intervals	Go	Medium
434	Number of Segments in a String	Go	Easy
433	Minimum Genetic Mutation	Go	Medium
432	All O`one Data Structure	Go	Hard
431	Encode N-ary Tree to Binary Tree 🔒	Go	Hard
430	Flatten a Multilevel Doubly Linked List	Go	Medium
429	N-ary Tree Level Order Traversal	Go	Easy
428	Serialize and Deserialize N-ary Tree 🔒	Go	Hard
427	Construct Quad Tree	Go	Easy
426	Convert Binary Search Tree to Sorted Doubly Linked List 🔒	Go	Medium
425	Word Squares 🔒	Go	Hard
424	Longest Repeating Character Replacement	Go	Medium
423	Reconstruct Original Digits from English	Go	Medium
422	Valid Word Square 🔒	Go	Easy
421	Maximum XOR of Two Numbers in an Array	Go	Medium
420	Strong Password Checker	Go	Hard
419	Battleships in a Board	Go	Medium
418	Sentence Screen Fitting 🔒	Go	Medium
417	Pacific Atlantic Water Flow	Go	Medium
416	Partition Equal Subset Sum	Go	Medium
415	Add Strings	Go	Easy
414	Third Maximum Number	Go	Easy
413	Arithmetic Slices	Go	Medium
412	Fizz Buzz	Go	Easy
411	Minimum Unique Word Abbreviation 🔒	Go	Hard
410	Split Array Largest Sum	Go	Hard
409	Longest Palindrome	Go	Easy
408	Valid Word Abbreviation 🔒	Go	Easy
407	Trapping Rain Water II	Go	Hard
406	Queue Reconstruction by Height	Go	Medium
405	Convert a Number to Hexadecimal	Go	Easy
404	Sum of Left Leaves	Go	Easy
403	Frog Jump	Go	Hard
402	Remove K Digits	Go	Medium
401	Binary Watch	Go	Easy
400	Nth Digit	Go	Easy
399	Evaluate Division	Go	Medium
398	Random Pick Index	Go	Medium
397	Integer Replacement	Go	Medium
396	Rotate Function	Go	Medium
395	Longest Substring with At Least K Repeating Characters	Go	Medium
394	Decode String	Go	Medium
393	UTF-8 Validation	Go	Medium
392	Is Subsequence	Go	Medium
391	Perfect Rectangle	Go	Hard
390	Elimination Game	Go	Medium
389	Find the Difference	Go	Easy
388	Longest Absolute File Path	Go	Medium
387	First Unique Character in a String	Go	Easy
386	Lexicographical Numbers	Go	Medium
385	Mini Parser	Go	Medium
384	Shuffle an Array	Go	Medium
383	Ransom Note	Go	Easy
382	Linked List Random Node	Go	Medium
381	Insert Delete GetRandom O(1) - Duplicates allowed	Go	Hard
380	Insert Delete GetRandom O(1)	Go	Medium
379	Design Phone Directory 🔒	Go	Medium
378	Kth Smallest Element in a Sorted Matrix	Go	Medium
377	Combination Sum IV	Go	Medium
376	Wiggle Subsequence	Go	Medium
375	Guess Number Higher or Lower II	Go	Medium
374	Guess Number Higher or Lower	Go	Easy
373	Find K Pairs with Smallest Sums	Go	Medium
372	Super Pow	Go	Medium
371	Sum of Two Integers	Go	Easy
370	Range Addition 🔒	Go	Medium
369	Plus One Linked List 🔒	Go	Medium
368	Largest Divisible Subset	Go	Medium
367	Valid Perfect Square	Go	Easy
366	Find Leaves of Binary Tree 🔒	Go	Medium
365	Water and Jug Problem	Go	Medium
364	Nested List Weight Sum II 🔒	Go	Medium
363	Max Sum of Rectangle No Larger Than K	Go	Hard
362	Design Hit Counter 🔒	Go	Medium
361	Bomb Enemy 🔒	Go	Medium
360	Sort Transformed Array 🔒	Go	Medium
359	Logger Rate Limiter 🔒	Go	Easy
358	Rearrange String k Distance Apart 🔒	Go	Hard
357	Count Numbers with Unique Digits	Go	Medium
356	Line Reflection 🔒	Go	Medium
355	Design Twitter	Go	Medium
354	Russian Doll Envelopes	Go	Hard
353	Design Snake Game 🔒	Go	Medium
352	Data Stream as Disjoint Intervals	Go	Hard
351	Android Unlock Patterns 🔒	Go	Medium
350	Intersection of Two Arrays II	Go	Easy
349	Intersection of Two Arrays	Go	Easy
348	Design Tic-Tac-Toe 🔒	Go	Medium
347	Top K Frequent Elements	Go	Medium
346	Moving Average from Data Stream 🔒	Go	Easy
345	Reverse Vowels of a String	Go	Easy
344	Reverse String	Go	Easy
343	Integer Break	Go	Medium
342	Power of Four	Go	Easy
341	Flatten Nested List Iterator	Go	Medium
340	Longest Substring with At Most K Distinct Characters 🔒	Go	Hard
339	Nested List Weight Sum 🔒	Go	Easy
338	Counting Bits	Go	Medium
337	House Robber III	Go	Medium
336	Palindrome Pairs	Go	Hard
335	Self Crossing	Go	Hard
334	Increasing Triplet Subsequence	Go	Medium
333	Largest BST Subtree 🔒	Go	Medium
332	Reconstruct Itinerary	Go	Medium
331	Verify Preorder Serialization of a Binary Tree	Go	Medium
330	Patching Array	Go	Hard
329	Longest Increasing Path in a Matrix	Go	Hard
328	Odd Even Linked List	Go	Medium
327	Count of Range Sum	Go	Hard
326	Power of Three	Go	Easy
325	Maximum Size Subarray Sum Equals k 🔒	Go	Medium
324	Wiggle Sort II	Go	Medium
323	Number of Connected Components in an Undirected Graph 🔒	Go	Medium
322	Coin Change	Go	Medium
321	Create Maximum Number	Go	Hard
320	Generalized Abbreviation 🔒	Go	Medium
319	Bulb Switcher	Go	Medium
318	Maximum Product of Word Lengths	Go	Medium
317	Shortest Distance from All Buildings 🔒	Go	Hard
316	Remove Duplicate Letters	Go	Hard
315	Count of Smaller Numbers After Self	Go	Hard
314	Binary Tree Vertical Order Traversal 🔒	Go	Medium
313	Super Ugly Number	Go	Medium
312	Burst Balloons	Go	Hard
311	Sparse Matrix Multiplication 🔒	Go	Medium
310	Minimum Height Trees	Go	Medium
309	Best Time to Buy and Sell Stock with Cooldown	Go	Medium
308	Range Sum Query 2D - Mutable 🔒	Go	Hard
307	Range Sum Query - Mutable	Go	Medium
306	Additive Number	Go	Medium
305	Number of Islands II 🔒	Go	Hard
304	Range Sum Query 2D - Immutable	Go	Medium
303	Range Sum Query - Immutable	Go	Easy
302	Smallest Rectangle Enclosing Black Pixels 🔒	Go	Hard
301	Remove Invalid Parentheses	Go	Hard
300	Longest Increasing Subsequence	Go	Medium
299	Bulls and Cows	Go	Medium
298	Binary Tree Longest Consecutive Sequence 🔒	Go	Medium
297	Serialize and Deserialize Binary Tree	Go	Hard
296	Best Meeting Point 🔒	Go	Hard
295	Find Median from Data Stream	Go	Hard
294	Flip Game II 🔒	Go	Medium
293	Flip Game 🔒	Go	Easy
292	Nim Game	Go	Easy
291	Word Pattern II 🔒	Go	Hard
290	Word Pattern	Go	Easy
289	Game of Life	Go	Medium
288	Unique Word Abbreviation 🔒	Go	Medium
287	Find the Duplicate Number	Go	Medium
286	Walls and Gates 🔒	Go	Medium
285	Inorder Successor in BST 🔒	Go	Medium
284	Peeking Iterator	Go	Medium
283	Move Zeroes	Go	Easy
282	Expression Add Operators	Go	Hard
281	Zigzag Iterator 🔒	Go	Medium
280	Wiggle Sort 🔒	Go	Medium
279	Perfect Squares	Go	Medium
278	First Bad Version	Go	Easy
277	Find the Celebrity 🔒	Go	Medium
276	Paint Fence 🔒	Go	Easy
275	H-Index II	Go	Medium
274	H-Index	Go	Medium
273	Integer to English Words	Go	Hard
272	Closest Binary Search Tree Value II 🔒	Go	Hard
271	Encode and Decode Strings 🔒	Go	Medium
270	Closest Binary Search Tree Value 🔒	Go	Easy
269	Alien Dictionary 🔒	Go	Hard
268	Missing Number	Go	Easy
267	Palindrome Permutation II 🔒	Go	Medium
266	Palindrome Permutation 🔒	Go	Easy
265	Paint House II 🔒	Go	Hard
264	Ugly Number II	Go	Medium
263	Ugly Number	Go	Easy
262	Trips and Users	MySQL	Hard
261	Graph Valid Tree 🔒	Go	Medium
260	Single Number III	Go	Medium
259	3Sum Smaller 🔒	Go	Medium
258	Add Digits	Go	Easy
257	Binary Tree Paths	Go	Easy
256	Paint House 🔒	Go	Easy
255	Verify Preorder Sequence in Binary Search Tree 🔒	Go	Medium
254	Factor Combinations 🔒	Go	Medium
253	Meeting Rooms II 🔒	Go	Medium
252	Meeting Rooms 🔒	Go	Easy
251	Flatten 2D Vector 🔒	Go	Medium
250	Count Univalue Subtrees 🔒	Go	Medium
249	Group Shifted Strings 🔒	Go	Medium
248	Strobogrammatic Number III 🔒	Go	Hard
247	Strobogrammatic Number II 🔒	Go	Medium
246	Strobogrammatic Number 🔒	Go	Easy
245	Shortest Word Distance III 🔒	Go	Medium
244	Shortest Word Distance II 🔒	Go	Medium
243	Shortest Word Distance 🔒	Go	Easy
242	Valid Anagram	Go	Easy
241	Different Ways to Add Parentheses	Go	Medium
240	Search a 2D Matrix II	Go	Medium
239	Sliding Window Maximum	Go	Hard
238	Product of Array Except Self	Go	Medium
237	Delete Node in a Linked List	Go	Easy
236	Lowest Common Ancestor of a Binary Tree	Go	Medium
235	Lowest Common Ancestor of a Binary Search Tree	Go	Easy
234	Palindrome Linked List	Go	Easy
233	Number of Digit One	Go	Hard
232	Implement Queue using Stacks	Go	Easy
231	Power of Two	Go	Easy
230	Kth Smallest Element in a BST	Go	Medium
229	Majority Element II	Go	Medium
228	Summary Ranges	Go	Medium
227	Basic Calculator II	Go	Medium
226	Invert Binary Tree	Go	Easy
225	Implement Stack using Queues	Go	Easy
224	Basic Calculator	Go	Hard
223	Rectangle Area	Go	Medium
222	Count Complete Tree Nodes	Go	Medium
221	Maximal Square	Go	Medium
220	Contains Duplicate III	Go	Medium
219	Contains Duplicate II	Go	Easy
218	The Skyline Problem	Go	Hard
217	Contains Duplicate	Go	Easy
216	Combination Sum III	Go	Medium
215	Kth Largest Element in an Array	Go	Medium
214	Shortest Palindrome	Go	Hard
213	House Robber II	Go	Medium
212	Word Search II	Go	Hard
211	Add and Search Word - Data structure design	Go	Medium
210	Course Schedule II	Go	Medium
209	Minimum Size Subarray Sum	Go	Medium
208	Implement Trie (Prefix Tree)	Go	Medium
207	Course Schedule	Go	Medium
206	Reverse Linked List	Go	Easy
205	Isomorphic Strings	Go	Easy
204	Count Primes	Go	Easy
203	Remove Linked List Elements	Go	Easy
202	Happy Number	Go	Easy
201	Bitwise AND of Numbers Range	Go	Medium
200	Number of Islands	Go	Medium
199	Binary Tree Right Side View	Go	Medium
198	House Robber	Go	Easy
197	Rising Temperature	MySQL	Easy
196	Delete Duplicate Emails	MySQL	Easy
195	Tenth Line	Bash	Easy
194	Transpose File	Bash	Medium
193	Valid Phone Numbers	Bash	Easy
192	Word Frequency	Bash	Medium
191	Number of 1 Bits	Go	Easy
190	Reverse Bits	Go	Easy
189	Rotate Array	Go	Easy
188	Best Time to Buy and Sell Stock IV	Go	Hard
187	Repeated DNA Sequences	Go	Medium
186	Reverse Words in a String II 🔒	Go	Medium
185	Department Top Three Salaries	MySQL	Hard
184	Department Highest Salary	MySQL	Medium
183	Customers Who Never Order	MySQL	Easy
182	Duplicate Emails	MySQL	Easy
181	Employees Earning More Than Their Managers	MySQL	Easy
180	Consecutive Numbers	MySQL	Medium
179	Largest Number	Go	Medium
178	Rank Scores	MySQL	Medium
177	Nth Highest Salary	MySQL	Medium
176	Second Highest Salary	MySQL	Easy
175	Combine Two Tables	MySQL	Easy
174	Dungeon Game	Go	Hard
173	Binary Search Tree Iterator	Go	Medium
172	Factorial Trailing Zeroes	Go	Easy
171	Excel Sheet Column Number	Go	Easy
170	Two Sum III - Data structure design 🔒	Go	Easy
169	Majority Element	Go	Easy
168	Excel Sheet Column Title	Go	Easy
167	Two Sum II - Input array is sorted	Go	Easy
166	Fraction to Recurring Decimal	Go	Medium
165	Compare Version Numbers	Go	Medium
164	Maximum Gap	Go	Hard
163	Missing Ranges 🔒	Go	Medium
162	Find Peak Element	Go	Medium
161	One Edit Distance 🔒	Go	Medium
160	Intersection of Two Linked Lists	Go	Easy
159	Longest Substring with At Most Two Distinct Characters 🔒	Go	Hard
158	Read N Characters Given Read4 II - Call multiple times 🔒	Go	Hard
157	Read N Characters Given Read4 🔒	Go	Easy
156	Binary Tree Upside Down 🔒	Go	Medium
155	Min Stack	Go	Easy
154	Find Minimum in Rotated Sorted Array II	Go	Hard
153	Find Minimum in Rotated Sorted Array	Go	Medium
152	Maximum Product Subarray	Go	Medium
151	Reverse Words in a String	Go	Medium
150	Evaluate Reverse Polish Notation	Go	Medium
149	Max Points on a Line	Go	Hard
148	Sort List	Go	Medium
147	Insertion Sort List	Go	Medium
146	LRU Cache	Go	Hard
145	Binary Tree Postorder Traversal	Go	Hard
144	Binary Tree Preorder Traversal	Go	Medium
143	Reorder List	Go	Medium
142	Linked List Cycle II	Go	Medium
141	Linked List Cycle	Go	Easy
140	Word Break II	Go	Hard
139	Word Break	Go	Medium
138	Copy List with Random Pointer	Go	Medium
137	Single Number II	Go	Medium
136	Single Number	Go	Easy
135	Candy	Go	Hard
134	Gas Station	Go	Medium
133	Clone Graph	Go	Medium
132	Palindrome Partitioning II	Go	Hard
131	Palindrome Partitioning	Go	Medium
130	Surrounded Regions	Go	Medium
129	Sum Root to Leaf Numbers	Go	Medium
128	Longest Consecutive Sequence	Go	Hard
127	Word Ladder	Go	Medium
126	Word Ladder II	Go	Hard
125	Valid Palindrome	Go	Easy
124	Binary Tree Maximum Path Sum	Go	Hard
123	Best Time to Buy and Sell Stock III	Go	Hard
122	Best Time to Buy and Sell Stock II	Go	Easy
121	Best Time to Buy and Sell Stock	Go	Easy
120	Triangle	Go	Medium
119	Pascal's Triangle II	Go	Easy
118	Pascal's Triangle	Go	Easy
117	Populating Next Right Pointers in Each Node II	Go	Medium
116	Populating Next Right Pointers in Each Node	Go	Medium
115	Distinct Subsequences	Go	Hard
114	Flatten Binary Tree to Linked List	Go	Medium
113	Path Sum II	Go	Medium
112	Path Sum	Go	Easy
111	Minimum Depth of Binary Tree	Go	Easy
110	Balanced Binary Tree	Go	Easy
109	Convert Sorted List to Binary Search Tree	Go	Medium
108	Convert Sorted Array to Binary Search Tree	Go	Easy
107	Binary Tree Level Order Traversal II	Go	Easy
106	Construct Binary Tree from Inorder and Postorder Traversal	Go	Medium
105	Construct Binary Tree from Preorder and Inorder Traversal	Go	Medium
104	Maximum Depth of Binary Tree	Go	Easy
103	Binary Tree Zigzag Level Order Traversal	Go	Medium
102	Binary Tree Level Order Traversal	Go	Medium
101	Symmetric Tree	Go	Easy
100	Same Tree	Go	Easy
99	Recover Binary Search Tree	Go	Hard
98	Validate Binary Search Tree	Go	Medium
97	Interleaving String	Go	Hard
96	Unique Binary Search Trees	Go	Medium
95	Unique Binary Search Trees II	Go	Medium
94	Binary Tree Inorder Traversal	Go	Medium
93	Restore IP Addresses	Go	Medium
92	Reverse Linked List II	Go	Medium
91	Decode Ways	Go	Medium
90	Subsets II	Go	Medium
89	Gray Code	Go	Medium
88	Merge Sorted Array	Go	Easy
87	Scramble String	Go	Hard
86	Partition List	Go	Medium
85	Maximal Rectangle	Go	Hard
84	Largest Rectangle in Histogram	Go	Hard
83	Remove Duplicates from Sorted List	Go	Easy
82	Remove Duplicates from Sorted List II	Go	Medium
81	Search in Rotated Sorted Array II	Go	Medium
80	Remove Duplicates from Sorted Array II	Go	Medium
79	Word Search	Go	Medium
78	Subsets	Go	Medium
77	Combinations	Go	Medium
76	Minimum Window Substring	Go	Hard
75	Sort Colors	Go	Medium
74	Search a 2D Matrix	Go	Medium
73	Set Matrix Zeroes	Go	Medium
72	Edit Distance	Go	Hard
71	Simplify Path	Go	Medium
70	Climbing Stairs	Go	Easy
69	Sqrt(x)	Go	Easy
68	Text Justification	Go	Hard
67	Add Binary	Go	Easy
66	Plus One	Go	Easy
65	Valid Number	Go	Hard
64	Minimum Path Sum	Go	Medium
63	Unique Paths II	Go	Medium
62	Unique Paths	Go	Medium
61	Rotate List	Go	Medium
60	Permutation Sequence	Go	Medium
59	Spiral Matrix II	Go	Medium
58	Length of Last Word	Go	Easy
57	Insert Interval	Go	Hard
56	Merge Intervals	Go	Medium
55	Jump Game	Go	Medium
54	Spiral Matrix	Go	Medium
53	Maximum Subarray	Go	Easy
52	N-Queens II	Go	Hard
51	N-Queens	Go	Hard
50	Pow(x, n)	Go	Medium
49	Group Anagrams	Go	Medium
48	Rotate Image	Go	Medium
47	Permutations II	Go	Medium
46	Permutations	Go	Medium
45	Jump Game II	Go	Hard
44	Wildcard Matching	Go	Hard
43	Multiply Strings	Go	Medium
42	Trapping Rain Water	Go	Hard
41	First Missing Positive	Go	Hard
40	Combination Sum II	Go	Medium
39	Combination Sum	Go	Medium
38	Count and Say	Go	Easy
37	Sudoku Solver	Go	Hard
36	Valid Sudoku	Go	Medium
35	Search Insert Position	Go	Easy
34	Find First and Last Position of Element in Sorted Array	Go	Medium
33	Search in Rotated Sorted Array	Go	Medium
32	Longest Valid Parentheses	Go	Hard
31	Next Permutation	Go	Medium
30	Substring with Concatenation of All Words	Go	Hard
29	Divide Two Integers	Go	Medium
28	Implement strStr()	Go	Easy
27	Remove Element	Go	Easy
26	Remove Duplicates from Sorted Array	Go	Easy
25	Reverse Nodes in k-Group	Go	Hard
24	Swap Nodes in Pairs	Go	Medium
23	Merge k Sorted Lists	Go	Hard
22	Generate Parentheses	Go	Medium
21	Merge Two Sorted Lists	Go	Easy
20	Valid Parentheses	Go	Easy
19	Remove Nth Node From End of List	Go	Medium
18	4Sum	Go	Medium
17	Letter Combinations of a Phone Number	Go	Medium
16	3Sum Closest	Go	Medium
15	3Sum	Go	Medium
14	Longest Common Prefix	Go	Easy
13	Roman to Integer	Go	Easy
12	Integer to Roman	Go	Medium
11	Container With Most Water	Go	Medium
10	Regular Expression Matching	Go	Hard
9	Palindrome Number	Go	Easy
8	String to Integer (atoi)	Go	Medium
7	Reverse Integer	Go	Easy
6	ZigZag Conversion	Go	Medium
5	Longest Palindromic Substring	Go	Medium
4	Median of Two Sorted Arrays	Go	Hard
3	Longest Substring Without Repeating Characters	Go	Medium
2	Add Two Numbers	Go	Medium
1	Two Sum	Go	Easy