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Solve LeetCode Problems in JavaScript. JavaScript solutions for LeetCode

LeetCode

LeetCode is one of the most well-known online judge platforms that you can use to practice your programming skills by solving coding questions. It has over 1,100 different problems, support for over 18 programming languages, and an active community that is always there to help you with the solutions you come up with. If your intention is to hone your coding skills, then this online judge platform is one of the best that you can use.

LeetCode in JavaScript

This is the solutions collection of my LeetCode submissions, most of them are programmed in JavaScript. All JavaScript codes are wrote in ECMAScript 6 standard, each solution file will contain a problem description in the beginning, and followed by some necessary explanation, some problems will provide more than one solution, please refer to the comments after the main solution for one specific problem. ATTENTION: If you also use JavaScript as your coding language, you should pay attention to some JavaScript INTERNAL issues, such as bitwise operators, so as to let you not drop into some trouble which may be caused by JavaScript itself.

#	Title	Solution	Difficulty
1848	Minimum Distance to the Target Element	JavaScript	Easy
1839	Longest Substring Of All Vowels in Order	JavaScript	Medium
1452	People Whose List of Favorite Companies Is Not a Subset of Another List	JavaScript	Medium
1451	Rearrange Words in a Sentence	JavaScript	Medium
1450	Number of Students Doing Homework at a Given Time	JavaScript	Easy
1446	Consecutive Characters	JavaScript	Easy
1379	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	JavaScript	Medium
1344	Angle Between Hands of a Clock	JavaScript	Medium
1290	Convert Binary Number in a Linked List to Integer	JavaScript	Easy
1288	Remove Covered Intervals	JavaScript	Medium
1071	Greatest Common Divisor of Strings	JavaScript	Easy
1047	Remove All Adjacent Duplicates In String	JavaScript	Easy
1046	Last Stone Weight	JavaScript	Easy
1038	Binary Search Tree to Greater Sum Tree	JavaScript	Medium
1021	Remove Outermost Parentheses	JavaScript	Easy
1019	Next Greater Node In Linked List	JavaScript & JavaScript Recursion	Medium
1009	Complement of Base 10 Integer	JavaScript	Easy
1008	Construct Binary Search Tree from Preorder Traversal	JavaScript	Medium
1002	Find Common Characters	JavaScript	Easy
989	Add to Array-Form of Integer	JavaScript	Easy
986	Interval List Intersections	JavaScript	Medium
977	Squares of a Sorted Array	JavaScript	Easy
965	Univalued Binary Tree	JavaScript	Easy
961	N-Repeated Element in Size 2N Array	JavaScript	Easy
938	Range Sum of BST	JavaScript	Medium
929	Unique Email Addresses	JavaScript	Easy
922	Sort Array By Parity II	JavaScript	Easy
905	Sort Array By Parity	JavaScript	Easy
890	Find and Replace Pattern	JavaScript	Medium
888	Uncommon Words from Two Sentences	JavaScript	Easy
881	Boats to Save People	JavaScript	Medium
876	Middle of the Linked List	JavaScript	Easy
859	Buddy Strings	JavaScript	Easy
852	Peak Index in a Mountain Array	JavaScript	Easy
844	Backspace String Compare	JavaScript	Easy
814	Binary Tree Pruning	JavaScript	Medium
804	Unique Morse Code Words	JavaScript	Easy
796	Rotate String	JavaScript	Easy
788	Rotated Digits	JavaScript	Easy
771	Jewels and Stones	JavaScript	Easy
760	Find Anagram Mappings	JavaScript	Easy
747	Largest Number At Least Twice of Others	JavaScript	Easy
744	Find Smallest Letter Greater Than Target	JavaScript	Easy
728	Self Dividing Numbers	JavaScript	Easy
724	Find Pivot Index	JavaScript	Easy
709	To Lower Case	JavaScript	Easy
701	Insert into a Binary Search Tree	JavaScript	Medium
693	Binary Number with Alternating Bits	JavaScript	Easy
692	Top K Frequent Words	JavaScript	Medium
686	Repeated String Match	JavaScript	Easy
682	Baseball Game	JavaScript	Easy
680	Valid Palindrome II	JavaScript	Easy
679	24 Game	JavaScript	Hard
678	Valid Parenthesis String	JavaScript	Medium
677	Map Sum Pairs	JavaScript	Medium
676	Implement Magic Dictionary	JavaScript	Medium
674	Longest Continuous Increasing Subsequence	JavaScript	Easy
672	Bulb Switcher II	JavaScript	Medium
671	Second Minimum Node In a Binary Tree	JavaScript	Easy
670	Maximum Swap	JavaScript	Medium
660	Remove 9	JavaScript	Hard
657	Judge Route Circle	JavaScript	Easy
654	Maximum Binary Tree	JavaScript	Medium
653	Two Sum IV - Input is a BST	JavaScript	Easy
645	Set Mismatch	JavaScript	Easy
643	Maximum Average Subarray I	JavaScript	Easy
637	Average of Levels in Binary Tree	JavaScript	Easy
633	Sum of Square Numbers	JavaScript	Easy
628	Maximum Product of Three Numbers	JavaScript	Easy
623	Add One Row to Tree	JavaScript	Medium
617	Merge Two Binary Trees	JavaScript	Easy
606	Construct String from Binary Tree	JavaScript	Easy
599	Minimum Index Sum of Two Lists	JavaScript	Easy
563	Binary Tree Tilt	JavaScript	Easy
561	Array Partition I	JavaScript	Easy
557	Reverse Words in a String III	JavaScript	Easy
551	Student Attendance Record I	JavaScript	Easy
543	Diameter of Binary Tree	JavaScript	Easy
541	Reverse String II	JavaScript	Easy
532	K-diff Pairs in an Array	JavaScript	Easy
530	Minimum Absolute Difference in BST	JavaScript	Easy
524	Longest Word in Dictionary through Deleting	JavaScript	Medium
520	Detect Capital	JavaScript	Easy
518	Coin Change 2	JavaScript	Medium
515	Find Largest Value in Each Tree Row	JavaScript	Medium
513	Find Bottom Left Tree Value	JavaScript	Medium
509	Fibonacci Number	JavaScript	Easy
508	Most Frequent Subtree Sum	JavaScript	Medium
507	Perfect Number	JavaScript	Easy
504	Base 7	JavaScript	Easy
496	Next Greater Element I	JavaScript	Easy
482	License Key Formatting	JavaScript	Medium
476	Number Complement	JavaScript	Easy
461	Hamming Distance	JavaScript	Easy
449	Serialize and Deserialize BST	JavaScript	Medium
448	Find All Numbers Disappeared in an Array	JavaScript	Easy
442	Find All Duplicates in an Array	JavaScript	Medium
434	Number of Segments in a String	JavaScript	Easy
414	Third Maximum Number	JavaScript	Easy
412	Fizz Buzz	JavaScript	Easy
409	Longest Palindrome	JavaScript	Easy
405	Convert a Number to Hexadecimal	JavaScript	Easy
404	Sum of Left Leaves	JavaScript	Easy
387	First Unique Character in a String	JavaScript	Easy
384	Shuffle an Array	JavaScript	Medium
345	Reverse Vowels of a String	JavaScript	Easy
344	Reverse String	JavaScript	Easy
342	Power of Four	JavaScript	Easy
341	Flatten Nested List Iterator	JavaScript	Medium
326	Power of Three	JavaScript	Easy
322	Coin Change	JavaScript	Medium
319	Bulb Switcher	JavaScript	Medium
299	Bulls and Cows	JavaScript	Medium
297	Serialize and Deserialize Binary Tree	JavaScript	Hard
287	Find the Duplicate Number	JavaScript	Medium
283	Move Zeroes	JavaScript	Easy
278	First Bad Version	JavaScript	Easy
273	Integer to English Words	JavaScript	Hard
268	Missing Number	JavaScript	Easy
263	Ugly Number	JavaScript	Easy
234	Palindrome Linked List	JavaScript	Easy
230	Kth Smallest Element in BST	JavaScript	Medium
227	Basic Calculator II	JavaScript	Medium
226	Invert Binary Tree	JavaScript	Easy
225	Implement Stack using Queues	JavaScript	Medium
219	Contains Duplicate II	JavaScript	Easy
217	Contains Duplicate	JavaScript	Easy
215	Kth Largest Element in an Array	JavaScript	Medium
208	Implement Trie (Prefix Tree)	JavaScript	Medium
206	Reverse Linked List	JavaScript	Easy
205	Isomorphic Strings	JavaScript	Easy
203	Remove Linked List Elements	JavaScript	Easy
202	Happy Number	JavaScript	Easy
199	Binary Tree Right Side View	JavaScript	Medium
191	Number of 1 Bits	JavaScript	Easy
190	Reverse Bits	JavaScript	Easy
172	Factorial Trailing Zeroes	JavaScript	Easy
171	Excel Sheet Column Number	JavaScript	Easy
169	Majority Element	JavaScript	Easy
168	Excel Sheet Column Title	JavaScript	Easy
167	Two Sum II - Input array is sorted	JavaScript	Easy
165	Compare Version Numbers	JavaScript	Medium
155	Min Stack	JavaScript	Easy
151	Reverse Words in a String	JavaScript	Medium
146	LRU Cache	JavaScript	Hard
142	Linked List Cycle II	JavaScript	Medium
141	Linked List Cycle	JavaScript	Easy
136	Single Number	JavaScript	Medium
122	Best Time to Buy and Sell Stock II	JavaScript	Easy
121	Best Time to Buy and Sell Stock	JavaScript	Easy
119	Pascal's Triangle II	JavaScript	Easy
118	Pascal's Triangle	JavaScript	Easy
112	Path Sum	JavaScript	Easy
111	Minimum Depth of Binary Tree	JavaScript	Easy
109	Convert Sorted List to Binary Search Tree	JavaScript	Medium
108	Convert Sorted Array to Binary Search Tree	JavaScript	Easy
107	Binary Tree Level Order Traversal II	JavaScript	Easy
103	Binary Tree Zigzag Level Order Traversal	JavaScript	Medium
102	Binary Tree Level Order Traversal	JavaScript	Easy
101	Symmetric Tree	JavaScript	Easy
94	Binary Tree Inorder Traversal	JavaScript	Medium
92	Reverse Linked List II	JavaScript	Medium
88	Merge Sorted Array	JavaScript	Easy
86	Partition List	JavaScript	Medium
80	Remove Duplicates from Sorted Array II	JavaScript	Medium
70	Climbing Stairs	JavaScript	Easy
69	Sqrt(x)	JavaScript	Easy
67	Add Binary	JavaScript	Easy
66	Plus One	JavaScript	Easy
58	Length of Last Word	JavaScript	Easy
56	Merge Intervals	JavaScript	Medium
53	Maximum Subarray	JavaScript	Easy
50	Pow(x, n)	JavaScript	Medium
35	Search Insert Position	JavaScript	Easy
28	Implement strStr()	JavaScript	Easy
27	Remove Element	JavaScript	Easy
26	Remove Duplicates from Sorted Array	JavaScript	Easy
25	Reverse Nodes in k-Group	JavaScript	Hard
24	Swap Nodes in Pairs	JavaScript	Medium
23	Merge k Sorted Lists	JavaScript	Hard
22	Generate Parentheses	JavaScript	Medium
21	Merge Two Sorted Lists	JavaScript	Easy
20	Valid Parentheses	JavaScript	Easy
19	Remove Nth Node From End of List	JavaScript	Easy
17	Letter Combinations of a Phone Number	JavaScript	Medium
15	3Sum	JavaScript	Medium
14	Longest Common Prefix	JavaScript	Easy
13	Roman to Integer	JavaScript	Easy
12	Integer to Roman	JavaScript	Medium
11	Container With Most Water	JavaScript	Medium
10	Regular Expression Matching	JavaScript	Hard
9	Palindrome Number	JavaScript	Easy
8	String to Integer (atoi)	JavaScript	Easy
7	Reverse Integer	JavaScript	Easy
6	ZigZag Conversion	JavaScript	Easy
5	Longest Palindromic Substring	JavaScript	Medium
4	Median of Two Sorted Arrays	JavaScript	Hard
3	Longest Substring Without Repeating Characters	JavaScript	Medium
2	Add Two Numbers	JavaScript	Medium
1	Two Sum	JavaScript	Easy