Leet Code - Javascript

A collection of my solutions to Leet Code problems in Javascript.

Running the tests for a problem

To run the tests, you must have Node.js installed.

Then, run the following command for the problem you want to test:

node <folder>/<problem-name>.js

Problems Solved

#	Title	Solution	Difficulty
1	Two Sum	JavaScript	Easy
2	Add Two Numbers	JavaScript	Medium
3	Longest Substring Without Repeating Characters	JavaScript	Medium
5	Longest Palindromic Substring	JavaScript	Medium
7	Reverse Integer	JavaScript	Medium
9	Palindrome Number	JavaScript	Easy
13	Roman to Integer	JavaScript	Easy
14	Longest Common Prefix	JavaScript	Easy
19	Remove Nth Node From End of List	JavaScript	Medium
20	Valid Parentheses	JavaScript	Easy
21	Merge Two Sorted Lists	JavaScript	Easy
26	Remove Duplicates from Sorted Array	JavaScript	Easy
27	Remove Element	JavaScript	Easy
35	Search Insert Position	JavaScript	Easy
36	Valid Sudoku	JavaScript	Medium
46	Permutations	JavaScript	Medium
53	Maximum Subarray	JavaScript	Easy
58	Length of Last Word	JavaScript	Easy
62	Unique Paths	JavaScript	Medium
66	Plus One	JavaScript	Easy
70	Climbing Stairs	JavaScript	Easy
74	Search a 2D Matrix	JavaScript	Medium
77	Combinations	JavaScript	Medium
83	Remove Duplicates from Sorted List	JavaScript	Easy
88	Merge Sorted Array	JavaScript	Easy
94	Binary Tree Inorder Traversal	JavaScript	Easy
98	Validate Binary Search Tree	JavaScript	Medium
100	Same Tree	JavaScript	Easy
101	Symmetric Tree	JavaScript	Easy
102	Binary Tree Level Order Traversal	JavaScript	Medium
104	Maximum Depth of Binary Tree	JavaScript	Easy
112	Path Sum	JavaScript	Easy
116	Populating Next Right Pointers in Each Node	JavaScript	Medium
118	Pascal's Triangle	JavaScript	Easy
120	Triangle	JavaScript	Medium
121	Best Time to Buy and Sell Stock	JavaScript	Easy
134	Gas Station	JavaScript	Medium
136	Single Number	JavaScript	Easy
141	Linked List Cycle	JavaScript	Easy
142	Linked List Cycle II	JavaScript	Medium
144	Binary Tree Preorder Traversal	JavaScript	Easy
145	Binary Tree Postorder Traversal	JavaScript	Easy
149	Max Points on a Line	JavaScript	Hard
167	Two Sum II - Input array is sorted	JavaScript	Medium
189	Rotate Array	JavaScript	Medium
190	Reverse Bits	JavaScript	Easy
191	Number of 1 Bits	JavaScript	Easy
198	House Robber	JavaScript	Medium
200	Number of Islands	JavaScript	Medium
203	Remove Linked List Elements	JavaScript	Easy
205	Isomorphic Strings	JavaScript	Easy
206	Reverse Linked List	JavaScript	Easy
217	Contains Duplicate	JavaScript	Easy
226	Invert Binary Tree	JavaScript	Easy
231	Power of Two	JavaScript	Easy
232	Implement Queue using Stacks	JavaScript	Easy
235	Lowest Common Ancestor of a Binary Search Tree	JavaScript	Easy
242	Valid Anagram	JavaScript	Easy
283	Move Zeroes	JavaScript	Easy
290	Word Pattern	JavaScript	Easy
299	Bulls and Cows	JavaScript	Medium
344	Reverse String	JavaScript	Easy
350	Intersection of Two Arrays II	JavaScript	Easy
383	Ransom Note	JavaScript	Easy
387	First Unique Character in a String	JavaScript	Easy
392	Is Subsequence	JavaScript	Easy
394	Decode String	JavaScript	Medium
409	Longest Palindrome	JavaScript	Easy
424	Longest Repeating Character Replacement	JavaScript	Medium
438	Find All Anagrams in a String	JavaScript	Medium
452	Minimum Number of Arrows to Burst Balloons	JavaScript	Medium
509	Fibonacci Number	JavaScript	Easy
542	01 Matrix	JavaScript	Medium
557	Reverse Words in a String III	JavaScript	Easy
566	Reshape the Matrix	JavaScript	Easy
567	Permutation in String	JavaScript	Medium
589	N-ary Tree Preorder Traversal	JavaScript	Easy
617	Merge Two Binary Trees	JavaScript	Easy
653	Two Sum IV - Input is a BST	JavaScript	Easy
692	Top K Frequent Words	JavaScript	Medium
695	Max Area of Island	JavaScript	Medium
700	Search in a Binary Search Tree	JavaScript	Easy
701	Insert into a Binary Search Tree	JavaScript	Medium
704	Binary Search	JavaScript	Easy
724	Find Pivot Index	JavaScript	Easy
733	Flood Fill	JavaScript	Easy
746	Min Cost Climbing Stairs	JavaScript	Easy
784	Letter Case Permutation	JavaScript	Medium
844	Backspace String Compare	JavaScript	Easy
876	Middle of the Linked List	JavaScript	Easy
953	Verifying an Alien Dictionary	JavaScript	Easy
977	Squares of a Sorted Array	JavaScript	Easy
994	Rotting Oranges	JavaScript	Medium
1046	Last Stone Weight	JavaScript	Easy
1061	Lexicographically Smallest Equivalent String	JavaScript	Medium
1071	Greatest Common Divisor of Strings	JavaScript	Easy
1443	Minimum Time to Collect All Apples in a Tree	JavaScript	Medium
1480	Running Sum of 1d Array	JavaScript	Easy
1519	Number of Nodes in the Sub-Tree With the Same Label	JavaScript	Medium
1833	Maximum Ice Cream Bars	JavaScript	Medium
2246	Longest Path With Different Adyacent Characters	JavaScript	Hard

License

MIT License

Copyright (c) 2023 - Leonel A. Zeballos

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.