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4301 problems total

Array (174)Sorting (45)Depth First Search (44)Tree (41)Breadth First Search (35)Linked List (28)Stack (27)Recursion (18)Graph Theory (12)Monotonic Stack (8)Queue (6)Shortest Path (2)

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Title	Difficulty	Videos	Companies
Number of Overlapping Lines between points on 2 parallel lines	easy	-	amazon facebook
Number of paths from source to destination in a directed acyclic graph	medium	-
Number of Restricted Paths From First to Last Node	medium	-
Number of Unicolored Paths between two nodes	medium	-
Number of unique elements in sorted array with repeated elements	easy	-
Number of Unique XOR Triplets I	medium	-
Number of Unique XOR Triplets II	medium	-
Number of Ways to Rearrange Sticks With K Sticks Visible	hard	-	facebook
Numbers Of Length N and Values Less Than K	hard	-	google
Nuts and Bolts Problem OR Lock and Key	medium	-
Object-Oriented Design for Jigsaw Puzzle	medium	-
Object-Oriented Design for Online Chat Server	hard	-
Object-Oriented Design for Online Hotel Booking System (OYO-like)	medium	-
Object-Oriented Design for Task/Job Scheduler	hard	-	uber
Object-Oriented Design for Vending Machine (Coffee)	medium	-	inmobi
OOD - Airline Management System	medium	-
OOD - Amazon-like Online Shopping System	hard	-
OOD - ATM	hard	-
OOD - Blackjack and a Deck of Cards	medium	-
OOD - Call Center	medium	-
OOD - Car Rental System	hard	-
OOD - Chess game	hard	-
OOD - Coffee Shop Order Management System	medium	-
OOD - Connection Pooling	medium	-
OOD - Cricinfo	hard	-
OOD - Elevator System	hard	-	uber
OOD - Facebook	hard	-
OOD - Hotel Management System	medium	-
OOD - In-memory File System	hard	-
OOD - Library Management System	medium	-
OOD - LinkedIn	hard	-
OOD - Movie Ticket Booking System	medium	-
OOD - Musical Juke Box	hard	-
OOD - Online Book Reader System	medium	-
OOD - Online Stock Brokerage System	hard	-
OOD - Othello (Reversi) Game	medium	-
OOD - Parking Lot	medium	-
OOD - Restaurant Management System	hard	-
OOD - Stack Overflow	hard	-
OOP - Inheritance Vs Composition	medium	-	google
Optimal Array Rounding with Sum Preservation	medium	-	airbnb
Optimal binary search tree construction for minimum search cost	medium	-
Optimized Brute Force String Search Algorithm	medium	-
Order-agnostic Binary Search on Sorted Array	medium	-
PageRank Algorithm Implementation	hard	-	google
Paint House IV	medium	-
Path Existence Queries in a Graph I	medium	-
Path Existence Queries in a Graph II	hard	-
Path With Minimum Effort	medium	-
Permutation of Array using given order	easy	-	twitter

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