NeetCode 150

Reverse Integer

Medium✓ Solution📹 Video

Math

Dynamic Programming Recursion String

#10

Regular Expression Matching

Hard✓ Solution

Backtracking Hash Table String

#17

Letter Combinations of a Phone Number

Medium✓ Solution

#39

Combination Sum

Medium✓ Solution📹 Video

#40

Combination Sum II

Medium✓ Solution📹 Video

#43

Multiply Strings

Medium✓ Solution📹 Video

Math Simulation String

Array Dynamic Programming Greedy

#45

Jump Game II

Medium✓ Solution📹 Video

#46

Permutations

Medium✓ Solution

#48

Rotate Image

Medium✓ Solution

Array Math Matrix

#50

Pow(x, n)

Medium✓ Solution📹 Video

Math Recursion

#51

N-Queens

Hard✓ Solution

Array Divide and Conquer Dynamic Programming

#53

Maximum Subarray

Medium✓ Solution📹 Video

#54

Spiral Matrix

Medium✓ Solution

Array Matrix Simulation

Array Dynamic Programming Greedy

#55

Jump Game

Medium✓ Solution📹 Video

#56

Merge Intervals

Medium✓ Solution📹 Video

Array Sorting

#57

Insert Interval

Medium✓ Solution📹 Video

Array

Combinatorics Dynamic Programming Math

#62

Unique Paths

Medium✓ Solution

#66

Plus One

Easy✓ Solution📹 Video

Array Math

Dynamic Programming Math Memoization

#70

Climbing Stairs

Easy✓ Solution📹 Video

#72

Edit Distance

Medium✓ Solution📹 Video

#73

Set Matrix Zeroes

Medium✓ Solution📹 Video

Array Hash Table Matrix

Array Backtracking Bit Manipulation

#78

Subsets

Medium✓ Solution📹 Video

#79

Word Search

Medium✓ Solution📹 Video

Array Backtracking Matrix+1

Array Backtracking Bit Manipulation

#90

Subsets II

Medium✓ Solution📹 Video

#91

Decode Ways

Medium✓ Solution📹 Video

#97

Interleaving String

Medium✓ Solution📹 Video

#115

Distinct Subsequences

Hard✓ Solution

Breadth-First Search Hash Table String

#127

Word Ladder

Hard✓ Solution📹 Video

Array Breadth-First Search Depth-First Search+2

#130

Surrounded Regions

Medium✓ Solution

Backtracking Dynamic Programming String

#131

Palindrome Partitioning

Medium✓ Solution📹 Video

#133

Clone Graph

Medium✓ Solution

#134

Gas Station

Medium✓ Solution📹 Video

Array Greedy

#136

Single Number

Easy✓ Solution

Array Bit Manipulation

#139

Word Break

Medium✓ Solution📹 Video

Array Dynamic Programming Hash Table+3

#152

Maximum Product Subarray

Medium✓ Solution📹 Video

Bit Manipulation Divide and Conquer

#190

Reverse Bits

Easy✓ Solution

Bit Manipulation Divide and Conquer

#191

Number of 1 Bits

Easy✓ Solution📹 Video

#198

House Robber

Medium✓ Solution

Array Breadth-First Search Depth-First Search+2

#200

Number of Islands

Medium✓ Solution📹 Video

Hash Table Math Two Pointers

#202

Happy Number

Easy✓ Solution📹 Video

#207

Course Schedule

Medium✓ Solution

#210

Course Schedule II

Medium✓ Solution📹 Video

#213

House Robber II

Medium✓ Solution

Array Divide and Conquer Heap (Priority Queue)+2

#215

Kth Largest Element in an Array

Medium✓ Solution📹 Video

#252Premium

Meeting Rooms

Easy✓ Solution📹 Video

Array Sorting

#253Premium

Meeting Rooms II

Medium✓ Solution📹 Video

Array Greedy Heap (Priority Queue)+3

#261Premium

Graph Valid Tree

Medium✓ Solution📹 Video

#268

Missing Number

Easy✓ Solution📹 Video

Array Binary Search Bit Manipulation+3

Array Breadth-First Search Depth-First Search+3

#269Premium

Alien Dictionary

Hard✓ Solution📹 Video

Array Breadth-First Search Matrix

#286Premium

Walls and Gates

Medium✓ Solution📹 Video

Data Stream Design Heap (Priority Queue)+2

#295

Find Median from Data Stream

Hard✓ Solution

Array Binary Search Dynamic Programming

#300

Longest Increasing Subsequence

Medium✓ Solution

#309

Best Time to Buy and Sell Stock with Cooldown

Medium✓ Solution📹 Video

#312

Burst Balloons

Hard✓ Solution

Array Breadth-First Search Dynamic Programming

#322

Coin Change

Medium✓ Solution📹 Video

#323Premium

Number of Connected Components in an Undirected Graph

Medium✓ Solution📹 Video

Array Breadth-First Search Depth-First Search+5

#329

Longest Increasing Path in a Matrix

Hard✓ Solution

Depth-First Search Eulerian Circuit Graph

#332

Reconstruct Itinerary

Hard✓ Solution

Bit Manipulation Dynamic Programming

#338

Counting Bits

Easy✓ Solution📹 Video

Design Hash Table Heap (Priority Queue)+1

#355

Design Twitter

Medium✓ Solution

#371

Sum of Two Integers

Medium✓ Solution📹 Video

Bit Manipulation Math

#416

Partition Equal Subset Sum

Medium✓ Solution📹 Video

Array Breadth-First Search Depth-First Search+1

#417

Pacific Atlantic Water Flow

Medium✓ Solution

#435

Non-overlapping Intervals

Medium✓ Solution

Array Dynamic Programming Greedy+1

Array Backtracking Dynamic Programming

#494

Target Sum

Medium✓ Solution📹 Video

#518

Coin Change II

Medium✓ Solution📹 Video

#621

Task Scheduler

Medium✓ Solution📹 Video

Array Counting Greedy+3

Dynamic Programming String Two Pointers

#647

Palindromic Substrings

Medium✓ Solution

#678

Valid Parenthesis String

Medium✓ Solution

Dynamic Programming Greedy Stack+1

#684

Redundant Connection

Medium✓ Solution

Array Breadth-First Search Depth-First Search+2

#695

Max Area of Island

Medium✓ Solution📹 Video

Breadth-First Search Depth-First Search Graph+2

#743

Network Delay Time

Medium✓ Solution📹 Video

#746

Min Cost Climbing Stairs

Easy✓ Solution

#763

Partition Labels

Medium✓ Solution📹 Video

Greedy Hash Table String+1

Array Binary Search Breadth-First Search+4

#778

Swim in Rising Water

Hard✓ Solution

Breadth-First Search Depth-First Search Dynamic Programming+3

#787

Cheapest Flights Within K Stops

Medium✓ Solution📹 Video

#846

Hand of Straights

Medium✓ Solution📹 Video

Array Greedy Hash Table+1

#973

K Closest Points to Origin

Medium✓ Solution

Array Divide and Conquer Geometry+4

Array Breadth-First Search Matrix

#994

Rotting Oranges

Medium✓ Solution

Array Heap (Priority Queue)

#1046

Last Stone Weight

Easy✓ Solution📹 Video

#1143

Longest Common Subsequence

Medium✓ Solution

#1584

Min Cost to Connect All Points

Medium✓ Solution

Array Graph Minimum Spanning Tree+1

Array Binary Search Heap (Priority Queue)+2

#1851

Minimum Interval to Include Each Query

Hard✓ Solution

#1899

Merge Triplets to Form Target Triplet

Medium✓ Solution

Array Greedy

#2013

Detect Squares

Medium✓ Solution

Array Counting Design+1

Two Sum

Easy✓ Solution📹 Video

Array Hash Table

Linked List Math Recursion

Add Two Numbers

Medium✓ Solution📹 Video

Hash Table Sliding Window String

Longest Substring Without Repeating Characters

Medium✓ Solution📹 Video

Array Binary Search Divide and Conquer

Median of Two Sorted Arrays

Hard✓ Solution📹 Video

Array Greedy Two Pointers

#11

Container With Most Water

Medium✓ Solution📹 Video

Array Sorting Two Pointers

#15

3Sum

Medium✓ Solution📹 Video

#19

Remove Nth Node From End of List

Medium✓ Solution📹 Video

Linked List Two Pointers

#20

Valid Parentheses

Easy✓ Solution📹 Video

Stack String

#21

Merge Two Sorted Lists

Easy✓ Solution📹 Video

Linked List Recursion

Backtracking Dynamic Programming String

#22

Generate Parentheses

Medium✓ Solution📹 Video

Divide and Conquer Heap (Priority Queue)Linked List+1

#23

Merge k Sorted Lists

Hard✓ Solution📹 Video

#25

Reverse Nodes in k-Group

Hard✓ Solution

Linked List Recursion

#33

Search in Rotated Sorted Array

Medium✓ Solution

Array Binary Search

#36

Valid Sudoku

Medium✓ Solution

Array Hash Table Matrix