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4301 problems total

Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)
All Topics(4301)Algorithms(3944)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)

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TitleDifficultyVideosCompanies
Coin Change with Fewest Number of Coins Given Infinite Supplymedium
adobeaffirmairbnb
Number of Connected Components in an Undirected Graphmedium-
amazonfacebookgoogle
Wiggle Sort 2 - No Adjacent Duplicatesmedium-
airbnbakuna-capitalfacebook
Maximum Size Subarray Sum equals Kmedium-
amazonfacebookgoogle
Power of Threeeasy-
applegoldman-sachsgoogle
Count of Range Sumhard-
google
Odd Even Linked List - Bring odd nodes first and even latermedium-
amazonbloombergcapital-one
Longest Increasing Path in a Matrixhard-
adobeamazonapple
Patching Arrayhard-
google
Verify Preorder Serialization of a Binary Treemedium-
google
Reconstruct Itineraryhard-
amazonapplebloomberg
Largest Binary Search Tree BST Subtreemedium-
amazonapplefacebook
Increasing Triplet Subsequencemedium-
amazonbloombergfacebook
Self Crossinghard-
amazongoogle
Palindrome Pairshard-
airbnbamazonapple
House Robber 3 - Houses in Binary Treemedium-
amazonfacebookgoogle
Counting Bitseasy
amazonapplebloomberg
Nested List Weight Summedium-
amazonclouderafacebook
Longest Substring with At Most K Distinct Charactersmedium-
amazonappdynamicsbloomberg
Flatten Nested List Iteratormedium-
airbnbamazonapple
Power of Foureasy-
two-sigma
Integer Breakmedium-
adobeapplegoogle
Reverse Stringeasy
adobeamazonapple
Reverse Vowels of a Stringeasy-
amazonapplefacebook
Moving Average of Last N numbers in a Streameasy-
amazonappdynamicsbloomberg
Top K Frequent Elementsmedium
amazonapplebloomberg
Design Tic-Tac-Toemedium-
amazonapplebloomberg
Intersection of Two Arrays 1 - Unique Elementseasy
amazonapplebloomberg
Intersection of Two Arrays 2 - Duplicates allowedeasy-
amazonapplebloomberg
Android Unlock Patternsmedium-
amazonapplebytedance
Data Stream as Disjoint Intervalshard-
amazonfacebookgoogle
Design Snake Gamemedium-
amazonapplebloomberg
Russian Doll Envelopeshard-
amazongooglemicrosoft
Design Twitter (Data Structure Design)medium-
amazondoordashoracle
Line Reflectionmedium-
amazongoogle
Queue using Set of Fixed-Length Arrayshard-
netflix
Binary Tree Depth from Parenthesized String Representationhard-
linkedin
Count Numbers with Unique Digitsmedium-
google
Rearrange String k Distance Aparthard-
amazonebayfacebook
Logger Rate Limitereasy-
amazonappleatlassian
Reconstruct Numbers from Anagrammed Stringeasy-
slack
Interleave Ranked Song Lists for Playlistmedium-
spotify
Sort Transformed Arraymedium-
facebookgoogle
Bomb Enemymedium-
amazongoogleuber
Validate Mastermind Game Guessesmedium-
facebook
Design Hit Countermedium-
affirmamazonapple
Alternating Add-Subtract Curried Functionmedium-
Max Sum of Rectangle No Larger Than Khard-
facebookgoogle
Largest Divisible Subsetmedium-
adobeamazongoogle
Nested List Weight Sum 2medium-
didifacebooklinkedin
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