My solutions for algorithmic problems from LeetCode.

List of Topics

1. String
2. Array
3. JavaScript
4. Graph
5. Linked List
6. Math
7. Trie
8. Binary Tree
9. Bit Manipulation

Solutions

String

• 214. Shortest Palindrome
• 241. Different Ways to Add Parentheses
• 392. Is Subsequence
• 451. Sort Characters By Frequency
• 567. Permutation in String
• 796. Rotate String
• 884. Uncommon Words from Two Sentences
• 921. Minimum Add to Make Parentheses Valid
• 1106. Parsing A Boolean Expression
• 1233. Remove Sub-Folders from the Filesystem
• 1405. Longest Happy String
• 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence
• 1593. Split a String Into the Max Number of Unique Substrings
• 1684. Count the Number of Consistent Strings
• 1768. Merge Strings Alternately
• 1813. Sentence Similarity III
• 1945. Sum of Digits of String After Convert
• 1957. Delete Characters to Make Fancy String
• 1963. Minimum Number of Swaps to Make the String Balanced
• 2490. Circular Sentence
• 2696. Minimum String Length After Removing Substrings
• 2825. Make String a Subsequence Using Cyclic Increments
• 2914. Minimum Number of Changes to Make Binary String Beautiful
• 2938. Separate Black and White Balls
• 2981. Find Longest Special Substring That Occurs Thrice I
• 3110. Score of a String
• 3163. String Compression III

Array

• 1. Two Sum
• 11. Container With Most Water
• 36. Valid Sudoku
• 179. Largest Number
• 283. Move Zeroes
• 303. Range Sum Query - Immutable
• 386. Lexicographical Numbers
• 494. Target Sum
• 539. Minimum Time Difference
• 632. Smallest Range Covering Elements from K Lists
• 641. Design Circular Deque
• 724. Find Pivot Index
• 729. My Calendar I
• 731. My Calendar II
• 769. Max Chunks To Make Sorted
• 874. Walking Robot Simulation
• 962. Maximum Width Ramp
• 1072. Flip Columns For Maximum Number of Equal Rows
• 1277. Count Square Submatrices with All Ones
• 1331. Rank Transform of an Array
• 1346. Check If N and Its Double Exist
• 1381. Design a Stack With Increment Operation
• 1475. Final Prices With a Special Discount in a Shop
• 1497. Check If Array Pairs Are Divisible by k
• 1545. Find Kth Bit in Nth Binary String
• 1574. Shortest Subarray to be Removed to Make Array Sorted
• 1590. Make Sum Divisible by P
• 1652. Defuse the Bomb
• 1671. Minimum Number of Removals to Make Mountain Array
• 1792. Maximum Average Pass Ratio
• 1861. Rotating the Box
• 1894. Find the Student that Will Replace the Chalk
• 1942. The Number of the Smallest Unoccupied Chair
• 1975. Maximum Matrix Sum
• 2022. Convert 1D Array Into 2D Array
• 2028. Find Missing Observations
• 2044. Count Number of Maximum Bitwise-OR Subsets
• 2070. Most Beautiful Item for Each Query
• 2239. Find Closest Number to Zero
• 2257. Count Unguarded Cells in the Grid
• 2290. Minimum Obstacle Removal to Reach Corner
• 2461. Maximum Sum of Distinct Subarrays With Length K
• 2463. Minimum Total Distance Traveled
• 2491. Divide Players Into Teams of Equal Skill
• 2501. Longest Square Streak in an Array
• 2530. Maximal Score After Applying K Operations
• 2554. Maximum Number of Integers to Choose From a Range I
• 2558. Take Gifts From the Richest Pile
• 2593. Find Score of an Array After Marking All Elements
• 2601. Prime Subtraction Operation
• 2779. Maximum Beauty of an Array After Applying Operation
• 2924. Find Champion II
• 3011. Find if Array Can Be Sorted
• 3254. Find the Power of K-Size Subarrays I
• 3264. Final Array State After K Multiplication Operations I

JavaScript

• 2619. Array Prototype Last
• 2620. Counter
• 2625. Flatten Deeply Nested Array
• 2626. Array Reduce Transformation
• 2627. Debounce
• 2629. Function Composition
• 2631. Group By
• 2634. Filter Elements from Array
• 2694. Event Emitter
• 2715. Timeout Cancellation

Graph

• 1514. Path with Maximum Probability

Linked List

• 2. Add Two Numbers
• 19. Remove Nth Node From End of List
• 21. Merge Two Sorted Lists
• 23. Merge k Sorted Lists
• 143. Reorder List
• 206. Reverse Linked List
• 234. Palindrome Linked List
• 725. Split Linked List in Parts
• 876. Middle of the Linked List
• 1367. Linked List in Binary Tree
• 2326. Spiral Matrix IV
• 2807. Insert Greatest Common Divisors in Linked List
• 3217. Delete Nodes From Linked List Present in Array

Math

• 9. Palindrome Number
• 670. Maximum Swap

Trie

• 440. K-th Smallest in Lexicographical Order
• 2416. Sum of Prefix Scores of Strings
• 3043. Find the Length of the Longest Common Prefix

Binary Tree

• 98. Validate Binary Search Tree
• 100. Same Tree
• 101. Symmetric Tree
• 102. Binary Tree Level Order Traversal
• 104. Maximum Depth of Binary Tree
• 109. Convert Sorted List to Binary Search Tree
• 110. Balanced Binary Tree
• 112. Path Sum
• 113. Path Sum II
• 114. Flatten Binary Tree to Linked List
• 124. Binary Tree Maximum Path Sum
• 144. Binary Tree Preorder Traversal
• 145. Binary Tree Postorder Traversal
• 199. Binary Tree Right Side View
• 515. Find Largest Value in Each Tree Row
• 951. Flip Equivalent Binary Trees
• 2583. Kth Largest Sum in a Binary Tree
• 2641. Cousins in Binary Tree II

Bit Manipulation

• 1310. XOR Queries of a Subarray
• 1371. Find the Longest Substring Containing Vowels in Even Counts
• 1829. Maximum XOR for Each Query
• 2220. Minimum Bit Flips to Convert Number
• 2275. Largest Combination With Bitwise AND Greater Than Zero
• 2419. Longest Subarray With Maximum Bitwise AND
• 3097. Shortest Subarray With OR at Least K II