Algorithms

Sorting

• Selection Sort Array
• Merge Sort Array
• Quick Sort Array
• Quick Sort LinkedList
• Rainbow Sort Array
• Bucket Sort/Radix Sort/Counting Sort

Two Pointers

• Binary Search
• Find First Position
• Find Last Position
• Find K Cloest
• Search in 2D Matrix
• Search Sorted Array of Unkown Size
• MergeSortedArray

Queue and Stack

• Implement Queue with Two Stack
• MaxStack
• MinStack
• Sort with Two Stack

LinkedList

• Add Two Numbers
• Add Two NumbersII
• Find Middle NodeOfLinkedList
• Insert Into A Sorted Circular LinkedList
• LinkedList Cycle
• LinkedList CycleII
• Palindrome LinkedList
• Remove LinkedList Elements
• Reorder List
• Reorder List
• Reverse LinkedList Iterative
• Reverse LinkedList Recursion

Tree

• Balanced Binary Tree
• Binary Tree Inorder Traversal
• Binary Tree Right Side View
• K-th Smallest In BST
• Symmetric Tree
• Validate Binary Search Tree
• Closest Binary Search Tree Value
• Two Sum BSTs
• Two Sum - Input is a BST

BFS

• Minimum Knight Moves
• Average of Levels in Binary Tree
• Binary Tree Level Order Traversal
• Binary Tree Level Order Traversal II
• Binary Tree Zigzag Level Order Traversal
• Clone Graph
• Course Schedule
• Course Schedule II
• Number of Islands
• Rotting Oranges
• Serialize and Deserialize Binary Tree

DFS

• Subsets
• Permutations
• Permutations II
• Next Permutation
• Permutation Sequence
• Generate Parentheses

Heap

• KLargestInArrayMaxHeap
• KLargestInArrayMinHeap
• KthLargestInArrayQuickSelect

HashTable + PriorityQueue

• Intersection of Two Arrays(Two Sets)
• Intersection of Two Arrays(Binary Search)
• Intersection of Two Arrays II
• K Closest Points to Origin(Priority Queue)
• K Closest Points to Origin(Sort)
• Missing Number
• Top K Frequent Elements
• Top K Frequenters words

String

• Char De-duplication
• Find All Anagrams in a String
• Longest Substring with At Most K Distinct Characters
• Longest Substring with At Most Two Distinct Characters
• Longest Substring Without Repeating Characters
• Permutation in String
• Remove Element
• RemoveSpaces
• ReOrderString
• String Shuffling

Bit

• Majority Element
• Maximum Length of a Concatenated String with Unique Characters
• Power of Two
• Single Number
• Sum of Two Integers
• UTF-8 Validation

Recursion

• N-Queens
• Spiral Matrix
• Spiral Matrix II