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