Table of Contents

Introduction

Unsolved problems

Burst Balloons

Longest increasing sequences

Top K words in a document

Sort Color

Permutations with duplicates

Find Kth node in BST

Buy and sell stock with cooldown

H index II

BackPack

DP - minimum adjustment cost

Search in Rotated sorted array with duplicates

Flatten binary tree to linked list

Minimum height trees

Serialize and deserialize binary tree

Find the Duplicate Number

Trapping Rain Water

First Missing Positive

Count of Smaller Numbers After Self

Largest Rectangle in Histogram

Scramble String

N-Queens

Minimum Window Substring

Substring with Concatenation of All Words

Populating Next Right Pointers in Each Node II

Remove Invalid Parentheses

Distinct Subsequences

Jump Game II

Candy

The Skyline Problem

Longest Valid Parentheses

Interleaving String

Expression Add Operators

Binary Tree Maximum Path Sum

Regular Expression Matching

Palindrome Partitioning II

Shortest Palindrome

Wildcard Matching

Max Points on a Line

Sudoku Solver

Word Ladder II

Create Maximum Number

Maximal Rectangle

Reverse Nodes in k-Group

Best Time to Buy and Sell Stock IV

Code Bases

Binary_search_variations/applications

Binary Tree Traversal

Remove Duplicates

Dynamic programming collection

Bit manipulations

Good tricks

Segment Tree

Good blogs

Blogs to study

Leetcode Frequency

Knowledge Bases

OS: Process, thread

Network

System Design

Java data structures

Java Syntax

Summary

Binary Search Tree

Binary Search

Expression evaluation

Combination/Permutation/Subset

Longest string subsequence/substring problems

Table of Contents

Introduction 0

Unsolved problems 1

Burst Balloons 1.1

Longest increasing sequences 1.2

Top K words in a document 1.3

Sort Color 1.4

Permutations with duplicates 1.5

Find Kth node in BST 1.6

Buy and sell stock with cooldown 1.7

H index II 1.8

BackPack 1.9

DP - minimum adjustment cost 1.10

Search in Rotated sorted array with duplicates 1.11

Flatten binary tree to linked list 1.12

Minimum height trees 1.13

Serialize and deserialize binary tree 1.14

Find the Duplicate Number 1.15

Trapping Rain Water 1.16

First Missing Positive 1.17

Count of Smaller Numbers After Self 1.18

Largest Rectangle in Histogram 1.19

Scramble String 1.20

N-Queens 1.21

Minimum Window Substring 1.22

Substring with Concatenation of All Words 1.23

Populating Next Right Pointers in Each Node II 1.24

Remove Invalid Parentheses 1.25

Distinct Subsequences 1.26

Jump Game II 1.27

Candy 1.28

The Skyline Problem 1.29

Longest Valid Parentheses 1.30

Interleaving String 1.31

Expression Add Operators 1.32

Binary Tree Maximum Path Sum 1.33

Regular Expression Matching 1.34

Palindrome Partitioning II 1.35

Shortest Palindrome 1.36

Wildcard Matching 1.37

Max Points on a Line 1.38

Sudoku Solver 1.39

Word Ladder II 1.40

Create Maximum Number 1.41

Maximal Rectangle 1.42

Reverse Nodes in k-Group 1.43

Best Time to Buy and Sell Stock IV 1.44

Code Bases 2

Binary_search_variations/applications 2.1

Binary Tree Traversal 2.2

Remove Duplicates 2.3

Dynamic programming collection 2.4

Bit manipulations 2.5

Good tricks 2.6

Segment Tree 2.7

Good blogs 3

Blogs to study 3.1

Leetcode Frequency 3.2

Knowledge Bases 4

OS: Process, thread 4.1

Network 4.2

System Design 4.3

Java data structures 4.4

Java Syntax 4.5

Summary 5

Binary Search Tree 5.1

Binary Search 5.2

Expression evaluation 5.3

Combination/Permutation/Subset 5.4

Longest string subsequence/substring problems 5.5