leetcode

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Algorithms

#	Title	Solution	Difficulty
771	Jewels and Stones	java/py/js	Easy
657	Judge Route Circle	java/py/js	Easy
461	Hamming Distance	java/py/js	Easy
476	Number Complement	java/py/js	Easy
728	Self Dividing Numbers	java/py/js	Easy
804	Unique Morse Code Words	java/py/js	Easy
500	Keyboard Row	java/py/js	Easy
344	Reverse String	java/py/js	Easy
541	Reverse String II	java/py/js	Easy
292	Nim Game	java/py/js	Easy
557	Reverse Words In A String III	java/py/js	Easy
104	Maximum Depth Of Binary Tree	java/py/js	Easy
617	Merge Two Binary Trees	java/py/js	Easy
226	Invert Binary Tree	java/py/js	Easy
693	Binary Number With Alternating Bits	java/py/js	Easy
108	Convert Sorted Array To Binary Search Tree	java/py/js	Easy
109	Convert Sorted List To Binary Search Tree	java/py/js	Medium
561	Array Partition I	java/py/js	Easy
463	Island Perimeter	java/py/js	Easy
821	Shortest Distance To A Character	java/py/js	Easy
371	Sum Of Two Integers	java/py/js	Easy
171	Excel Sheet Column Number	java/py/js	Easy
168	Excel Sheet Column Title	java/py/js	Easy
12	Integer To Roman	java/py/js	Easy
13	Roman To Integer	java/py/js	Easy
155	Min Stack	java/py/js	Easy
232	Implement Queue Using Stacks	java/py/js	Easy
225	Implement Stack Using Queues	java/py/js	Easy
20	Valid Parentheses	java/py/js	Easy
485	Max Consecutive Ones	java/py/js	Easy
191	Number Of 1 Bits	java/py/js	Easy
258	Add Digits	java/py/js	Easy
520	Detect Capital	java/py/js	Easy
682	BaseBall Game	java/py/js	Easy
404	Sum Of Left Leaves	java/py/js	Easy
283	Move Zeroes	java/py/js	Easy
136	Single Number	java/py/js	Easy
137	Single Number II	java/py/js	Medium
260	Single Number III	java/py/js	Medium
1	Two Sum	java/py/js	Easy
167	Two Sum II Input Array Is Sorted	java/py/js	Easy
653	Two Sum IV Input Is A Bst	java/py/js	Easy
9	Palindrome Number	java/py/js	Easy
389	Find The Difference	java/py/js	Easy
94	Binary Tree Inorder Traversal	java/py/js	Medium
144	Binary Tree Preorder Traversal	java/py/js	Medium
145	Binary Tree Postorder Traversal	java/py/js	Hard
231	Power Of Two	java/py/js	Easy
326	Power Of Three	java/py/js	Easy
342	Power Of Four	java/py/js	Easy
38	Count And Say	java/py/js	Easy
383	Ransom Note	java/py/js	Easy
217	Contains Duplicate	java/py/js	Easy
219	Contains Duplicate II	java/py/js	Easy
27	Remove Element	java/py/js	Easy
100	Same Tree	java/py/js	Easy
832	Flipping An Image	java/py/js	Easy
345	Reverse Vowels Of A String	java/py/js	Easy
83	Remove Duplicates From Sorted List	java/py/js	Easy
82	Remove Duplicates From Sorted List II	java/py/js	Medium
811	Subdomain Visit Count	java/py/js	Easy
637	Average Of Levels In Binary Tree	java/py/js	Easy
118	Pascals Triangle	java/py/js	Easy
303	Range Sum Query Immutable	java/py/js	Easy
412	Fizz Buzz	java/py/js	Easy
257	Binary Tree Paths	java/py/js	Easy
496	Next Greater Element I	java/py/js	Easy
766	Toeplitz Matrix	java/py/js	Easy
669	Trim A Binary Search Tree	java/py/js	Easy
806	Number Of Lines To Write String	java/py/js	Easy
566	Reshape The Matrix	java/py/js	Easy
575	Distribute Candies	java/py/js	Easy
21	Merge Two Sorted Lists	java/py/js	Easy
88	Merge Sorted Array	java/py/js	Easy
530	Minimum Absolute Difference In Bst	java/py/js	Easy
119	Pascals Triangle II	java/py/js	Easy
690	Employee Importance	java/py	Easy
169	Majority Element	java/py/js	Easy
107	Binary Tree Level Order Traversal II	java/py/js	Easy
349	Intersection Of Two Arrays	java/py/js	Easy
350	Intersection Of Two Arrays II	java/py/js	Easy
268	Missing Number	java/py/js	Easy
788	Rotated Digits	java/py/js	Easy
695	Max Area Of Island	java/py/js	Easy
762	Prime Number Of Set Bits In Binary Representation	java/py/js	Easy
521	Longest Uncommon Subsequence I	java/py/js	Easy
812	Largest Triangle Area	java/py/js	Easy
606	Construct String From Binary Tree	java/py/js	Easy
202	Happy Number	java/py/js	Easy
563	Binary Tree Tilt	java/py/js	Easy
696	Count Binary Substrings	java/py/js	Easy
121	Best Time To Buy And Sell Stock	java/py/js	Easy
122	Best Time To Buy And Sell Stock II	java/py/js	Easy
714	Best Time To Buy And Sell Stock With Transaction Fee	java/py/js	Medium
599	Minimum Index Sum Of Two Lists	java/py/js	Easy
551	Student Attendance Record I	java/py/js	Easy
538	Convert Bst To Greater Tree	java/py/js	Easy
235	Lowest Common Ancestor Of A Binary Search Tree	java/py/js	Easy
697	Degree Of An Array	java/py/js	Easy
671	Second Minimum Node In A Binary Tree	java/py/js	Easy
242	Valid Anagram	java/py/js	Easy
784	Letter Case Permutation	java/py/js	Easy
453	Minimum Moves To Equal Array Elements	java/py/js	Easy
661	Image Smoother	java/py/js	Easy
598	Range Addition II	java/py/js	Easy
492	Construct The Rectangle	java/py/js	Easy
447	Number Of Boomerangs	java/py/js	Easy
824	Goat Latin	java/py/js	Easy
206	Reverse Linked List	java/py/js	Easy
92	Reverse Linked List II	java/py/js	Medium
733	Flood Fill	java/py/js	Easy
110	Balanced Binary Tree	java/py/js	Easy
70	Climbing Stairs	java/py/js	Easy
448	Find All Numbers Disappeared In An Array	java/py/js	Easy
409	Longest Palindrome	java/py/js	Easy
35	Search Insert Position	java/py/js	Easy
278	First Bad Version	java/py/js	Easy
101	Symmetric Tree	java/py/js	Easy
506	Relative Ranks	java/py/js	Easy
717	1 Bit and 2 Bit Characters	java/py/js	Easy
744	Find Smallest Letter Greater Than Target	java/py/js	Easy
203	Remove Linked List Elements	java/py/js	Easy
237	Delete Node In A Linked List	java/py/js	Easy
405	Convert A Number To Hexadecimal	java/py/js	Easy
796	Rotate String	java/py/js	Easy
844	Backspace String Compare	java/py/js	Easy
26	Remove Duplicates From Sorted Array	java/py/js	Easy
80	Remove Duplicates From Sorted Array II	java/py/js	Medium
112	Path Sum	java/py/js	Easy
113	Path Sum II	java/py/js	Medium
437	Path Sum III	java/py/js	Easy
263	Ugly Number	java/py/js	Easy
783	Minimum Distance Between Bst Nodes	java/py/js	Easy
747	Largest Number At Least Twice Of Others	java/py/js	Easy
455	assign cookies	java/py/js	Easy
415	Add Strings	java/py/js	Easy
66	Plus One	java/py/js	Easy
67	Add Binary	java/py/js	Easy
504	Base 7	java/py/js	Easy
830	Positions Of Large Groups	java/py/js	Easy
572	Subtree Of Another Tree	java/py/js	Easy
819	Most Common Word	java/py/js	Easy
172	Factorial Trailing Zeroes	java/py/js	Easy
290	Word Pattern	java/py/js	Easy
205	Isomorphic Strings	java/py/js	Easy
125	Valid Palindrome	java/py/js	Easy
680	Valid Palindrome II	java/py/js	Easy
141	Linked List Cycle	java/py/js	Easy
142	Linked List Cycle II	java/py/js	Medium
387	First Unique Character In A String	java/py/js	Easy
628	Maximum Product Of Three Numbers	java/py/js	Easy
724	Find Pivot Index	java/py/js	Easy
53	Maximum Subarray	java/py/js	Easy
543	Diameter Of Binary	java/py/js	Easy
746	Min Cost Climbing Stairs	java/py/js	Easy
198	House Robber	java/py/js	Easy
213	House Robber II	java/py/js	Medium
111	Minimum Depth Of Binary Tree	java/py/js	Easy
849	Maximize Distance To Closest Person	java/py/js	Easy
674	Longest Continuous Increasing Subsequence	java/py/js	Easy
234	Palindrome Linked List	java/py/js	Easy
414	Third Maximum Number	java/py/js	Easy
645	Set Mismatch	java/py/js	Easy
58	Length Of Last Word	java/py/js	Easy
14	Longest Common Prefix	java/py/js	Easy
594	Longest Harmonious Subsequence	java/py/js	Easy
374	Guess Number Higher Or Lower	java/py	Easy
852	Peak Index In A Mountain Array	java/py/js	Easy
441	Arranging Coins	java/py/js	Easy
69	Sqrtx	java/py/js	Easy
367	Valid Perfect Square	java/py/js	Easy
475	Heaters	java/py/js	Easy
501	Find Mode In Binary Search Tree	java/py/js	Easy
434	Number Of Segments In A String	java/py/js	Easy
190	Reverse Bits	java/py/js	Easy
400	Nth Digits	java/py/js	Easy
160	Intersection Of Two Linked Lists	java/py/js	Easy
860	LemonadeChange	java/py/js	Easy
401	Binary Watch	java/py/js	Easy
482	License Key Formatting	java/py/js	Easy
720	Longest Word In Dictionary	java/py/js	Easy
836	Rectangle Overlap	java/py/js	Easy
643	Maximum Average Subarray I	java/py/js	Easy
189	Rotate Array	java/py/js	Easy
61	Rotate List	java/py/js	Medium
687	Longest Univalue Path	java/py/js	Easy
28	Implement Strstr	java/py/js	Easy
459	Repeated Substring Pattern	java/py/js	Easy
581	Shortest Unsorted Continuous Subarray	java/py/js	Easy
443	String Compression	java/py/js	Easy
438	Find All Anagrams In A String	java/py/js	Easy
7	Reverse Integer	java/py/js	Easy
507	Perfect Number	java/py/js	Easy
840	Magic Squares In Grid	java/py/js	Easy
532	K Diff Pairs In An Array	java/py/js	Easy
633	Sum Of Square Numbers	java/py/js	Easy
605	Can Place Flowers	java/py/js	Easy
204	Count Primes	java/py/js	Easy
859	Buddy Strings	java/py/js	Easy
686	Repeated String Match	java/py/js	Easy
665	Non Decreasing Array	java/py/js	Easy
867	Transpose Matrix	java/py/js	Easy
479	Largest Palindrome Product	java/py/js	Easy
102	Binray Tree Level Order Traversal	java/py/js	Medium
22	Generate Parentheses	java/py/js	Medium
704	Binary Search	java/py/js	Easy
709	To Lower Case	java/py/js	Easy
700	Search In A Binary Search Tree	java/py/js	Easy
868	Binary Gap	java/py/js	Easy
559	Maximum Depth Of N Ary Tree	java/py	Easy
429	N Ary Tree Level Order Traversal	java/py	Easy
589	N Ary Tree Preorder Traversal	java/py	Easy
590	N Ary Tree Postorder Traversal	java/py	Easy
707	Design Linked List	java/py/js	Easy
622	Design Circular Queue	java/py/js	Easy
641	Design Circular Deque	java/py/js	Easy
705	Design Hashset	java/py/js	Easy
706	Design Hashmap	java/py/js	Easy
872	Leaf Similar Trees	java/py/js	Easy
427	Construct Quad Tree	java/py	Easy
458	Poor Pigs	java/py/js	Easy
558	Quad Tree Intersection	java/py	Easy
874	Walking Robot Simulation	java/py/js	Easy
876	Middle Of The Linked List	java/py/js	Easy
703	Kth Largest Element In A Stream	java/py/js	Easy
39	Combination Sum	java/py/js	Medium
40	Combination Sum II	java/py/js	Medium
216	Combination Sum III	java/py/js	Medium
46	Permutations	java/py/js	Medium
47	Permutations II	java/py/js	Medium
77	Combinations	java/py/js	Medium
78	Subsets	java/py/js	Medium
90	Subsets II	java/py/js	Medium
89	Gray Code	java/py/js	Medium
17	Letter Combinations Of A Phone Number	java/py/js	Medium
131	Palindrome Partitioning	java/py/js	Medium
60	Permutation Sequence	java/py/js	Medium
106	Construct Binary Tree From Inorder And Postorder Traversal	java/py/js	Medium
105	Construct Binary Tree From Preorder And Inorder Traversal	java/py/js	Medium
654	Maximum Binary Tree	java/py/js	Medium
208	Implement Trie Prefix Tree	java/py/js	Medium
114	Flatten Binary Tree To Linked List	java/py/js	Medium
284	Peeking Iterator	java/py	Medium
328	Odd Even Linked List	java/py/js	Medium
677	Map Sum Pairs	java/py/js	Medium
442	Find All Duplicates In An Array	java/py/js	Medium
64	Minimum Path Sum	java/py/js	Medium
535	Encode And Decode Tinyurl	java/py/js	Medium
540	Single Element In A Sorted Array	java/py/js	Medium
148	Sort List	java/py/js	Medium
24	Swap Nodes In Pairs	java/py/js	Medium
143	Reorder List	java/py/js	Medium
515	Find Largest Value In Each Tree Row	java/py/js	Medium
199	Binary Tree Right Side View	java/py/js	Medium
147	Insertion Sort List	java/py/js	Medium
495	Teemo Attacking	java/py/js	Medium
56	Merge Intervals	java/py/js	Medium
11	Container With Most Water	java/py/js	Medium
338	Counting Bits	java/py/js	Medium
287	Find The Duplicate Number	java/py/js	Medium
807	Max Increase To Keep City Skyline	java/py/js	Medium
54	Spiral Matrix	java/py/js	Medium
59	Spiral Matrix II	java/py/js	Medium
885	Spiral Matrix III	java/py/js	Medium
19	Remove Nth Node From End Of List	java/py/js	Medium
526	Beautiful Arrangement	java/py/js	Medium
814	Binary Tree Pruning	java/py/js	Medium
150	Evaluate Reverse Polish Notation	java/py/js	Medium
341	Flatten Nested List Iterator	java/py/js	Medium
856	Score Of Parentheses	java/py/js	Medium
725	Split Linked List In Parts	java/py/js	Medium
86	Partition List	java/py/js	Medium
2	Add Two Numbers	java/py/js	Medium
445	Add Two Numbers II	java/py/js	Medium
817	Linked List Components	java/py/js	Medium
430	Flatten A Multilevel Doubly Linked List	java/py	Medium
138	Copy List With Random Pointer	java/py/js	Medium
62	Unique Paths	java/py/js	Medium
63	Unique Paths II	java/py/js	Medium
162	Find Peak Element	java/py/js	Medium
200	Number Of Islands	java/py/js	Medium
223	Rectangle Area	java/py/js	Medium
419	Battleships In A Board	java/py/js	Medium
129	Sum Root To Leaf Numbers	java/py/js	Medium
537	Complex Number Multiplication	java/py/js	Medium
228	Summary Ranges	java/py/js	Medium
890	Find And Replace Pattern	java/py/js	Medium
48	Rotate Image	java/py/js	Medium
74	Search A 2d Matrix	java/py/js	Medium
153	Find Minimum In Rotated Sorted Array	java/py/js	Medium
34	Find First And Last Position Of Element In Sorted Array	java/py/js	Medium
75	Sort Colors	java/py/js	Medium
623	Add One Row To Tree	java/py/js	Medium
513	Find Bottom Left Tree Value	java/py/js	Medium
103	Binary Tree Zigzag Level Order Traversal	java/py/js	Medium
134	Gas Station	java/py/js	Medium
238	Product Of Array Except Self	java/py/js	Medium
896	Monotonic Array	java/py/js	Easy
739	Daily Temperatures	java/py/js	Medium
921	Minimum Add To Make Parentheses Valid	java/py/js	Medium
797	All Paths From Source To Target	java/py/js	Medium
789	Escape The Ghosts	java/py/js	Medium
701	Insert Into A Binary Search Tree	java/py/js	Medium
165	Compare Version Numbers	java/py/js	Medium
8	String To Integer Atoi	java/py/js	Medium
299	Bulls And Cows	java/py/js	Medium
394	Decode String	java/py/js	Medium
938	Range Sum Of Bst	java/py/js	Medium
71	Simplify Path	java/py/js	Medium
451	Sort Characters By Frequency	java/py/js	Medium
215	Kth Largest Element In An Array	java/py/js	Medium
347	Top K Frequent Elements	java/py/js	Medium
692	Top K Frequent Words	java/py/js	Medium

Database

#	Title	Solution	Difficulty
596	Big Countries	mysql	Easy
182	Duplicate Emails	mysql	Easy
596	Classes More Than 5 Students	mysql	Easy
620	Not Boring Movies	mysql	Easy
196	Delete Duplicate Emails	mysql	Easy
627	Swap Salary	mysql	Easy
175	Combine Two Tables	mysql	Easy
183	Customers Who Never Order	mysql	Easy
197	Rising Temperature	mysql	Easy
181	Employees Earning More Than Their Managers	mysql	Easy
176	Second Highest Salary	mysql	Easy
626	Exchange Seats	mysql	Medium
178	Rank Scores	mysql	Medium
180	Consecutive Numbers	mysql	Medium
177	Nth Highest Salary	mysql	Medium
184	Department Highest Salary	mysql	Medium