Examples

• 10 Common Heuristic
• 20 Coding Patterns

Graphs

• Min Cost to Add new roads

PrefixSum

• Subarray sum equals k
• Range sum query
• Maximum Size Subarray Sum
• Contiguous Array

Arrays

• 2SUM
• Buy-Sell-Stock
• Contains Duplicate
• Product of Array Except Self
• Max Sub Array
• Maximum Product Subarray
• Find minimum in rotated sorted array
• Search in rotated sorted array
• 3SUM
• Water Container
• Scholarship Rank
• K Spike
• Average Standing
• Minimum Total Distance

Bitwise

• Sum without using + or -
• Number of 1 bits
• Counting bits
• Missing Number
• Reverse Bits
• Swap Without Temporary Variable

Binary Search

• Median Of Two Sorted Arrays
• Get Operations

DP

• Matrix Mul
• Longest Common Subsequence
• Longest Common Substring
• Optimal BST
• Coin Change
• Coin Combination
• Rod Cutting
• 01-Knap Pack
• SubSetSum
• LIS
• MED
• LIS
• LPS
• Regular Expression Matching
• Minimum Jumps To End
• Weighted Job scheduling
• Max Sub square matrix
• Max Size Rectangle in a Matrix
• Word Break
• Buy Sell Stock
• Text Justification
• Minimum Cost Path
• Best picking strategy
• Burst Balloon
• Box Stacking
• Staircase
• String interleaving
• Max non adj sum
• Number of BST given n keys
• Longest Bitonic Sequence
• Numbers Without Consecutive 1s in binary representation
• Sub rect sum in linear time
• Biggest square with sides with all Xs
• Decode Ways

Ranges

• Insert Range
• Merge Intervals
• Non-overlapping intervals
• Meeting Room I
• Meeting Room II

Linked Lists

• Reverse LL recursive
• Reverse LL Iterative
• LL Cycle
• Merge to sorted Lists
• Remove nth node from end of list
• Reorder List
• Flatten a Multilevel Doubly Linked List
• Add two numbers

Heap

• Merge K sorted lists
• Top K Frequent Elements
• Find Median from Data Stream
• Get minimum cost

Matrix

• Zeroing Matrix
• Return elements in a spiral
• Rotate image
• Word Search
• 01 Matrix

Strings

• Longest Substring Without Repeating Characters
• Valid Anagram
• Group Anagrams
• Valid Palindrome
• Longest Palindrome Substring
• Palindromic Substrings
• Encoding Decoding Strings
• Binary String SUM

Binary Tree

• Max Deepth

• Same tree

• Flip a tree

• Tree Max Path Sum

• Level Order Traversal

• Serialize Deserialize Tree

• Subtree of another tree

• Kth Smallest Element in BST

• Lowest Common Ancestor of a Binary Search Tree

• Implement Trie (Prefix Tree)

• Validate Binary Search Tree

• Design Add and Search Words Data Structure

• Word Search II

• Construct Binary Tree from Preorder and Inorder Traversal

Others

• Valid SUDOKU

D&Q

• SkyLine

Back tracking

• Combinations
• Permute
• Generate Parenthesis
• BST Inorder
• BST Levelorder
• Largest Rectangle in Histogram
• BST To Sorted List
• Letter Combinations of a Phone Number

Sliding Window

• Longest Repeating Character Replacement
• Minimum Window Substring
• Sliding Window
• Minimum inefficiency

2PT

• Reverse Array
• Remove el from array in place, return new len
• Best Palindrome Parittion
• Min boxes
• Candidates

Queue

• Moving Average

Stack

• Max Rectangle Area With 1D Array Input
• Valid Parentheses

Recursion

• Print a string in reverse order
• Fibonacci and memoization

Trie

• Maximum XOR
• Word Squares