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281 problems total

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Title	Difficulty	Videos	Companies
2-CNF Boolean Satisfiability Problem	hard	-	dropbox
8-Puzzle Solver	hard	-	airbnb
Alice Joins Probability Student Club by Calculating Expected Values of Probabilistic Games	hard	-	two-sigma
Alternating Two-Instance Singleton Pattern	medium	-	google
Approximate Median in Sub-linear Time	medium	-	dropbox
Area of intersection of two rectangles	easy	-	google
Autocomplete Suggestion System	medium	-	twitter
Balance Parentheses with Minimum Insertions and Deletions	hard	-	facebook
Bartender Drink Optimization	medium	-	amazon
Binary Search Without Multiplication, Division and Bit-shift Operations	hard	-	netflix
Binary Tree Level Order Traversal	medium		microsoft
Binary Tree Path Sum - Minimum Sum Root to Leaf path	easy	-	apple
Bishop diagonally attack on chess board	medium	-	google
Blackjack Optimal Strategy with Known Card Sequence	hard	-	MIT
Bloom Filter Implementation	medium	-	triplebyte
Boolean Parenthesization Problem	hard	-	quantcast
Break a string into lines of length k without breaking words	medium	-	amazon
BST Floor and Ceiling	easy	-	oracle
Buildings with sunset view	medium	-	mailchimp
Busiest period in a building	easy	-	amazon
Capturing Loop Variables in Lambdas	easy	-	dropbox
Check if a graph is minimally-connected	medium	-	facebook
Check if any pair of rectangles overlap	easy	-	google
Check if doubly linked list is palindrome	easy	-	google
Check if target word exists in matrix horizontally or vertically	easy	-	microsoft
Check if words chain to form a circle	medium	-	dropbox
Chess King Check Detector	hard	-	Oracle
Closest leaf to root in a binary tree	medium	-
Closest pair of points	easy	-	google
Coin Change with Fewest Number of Coins Given Canonical System and Infinite Supply	medium	-	google
Coins In a Line Game	medium	-	square google
Collatz Sequence	easy	-	apple
Conditional selection between x and y with bitwise operations	medium	-	facebook
Construct Binary Search Tree BST from Postorder Traversal	medium	-	google
Construct Cartesian Tree from Sequence	hard	-	netflix
Count elements in range in sorted matrix	hard	-	google
Count Inversions - Count Smaller on Right	medium	-	google
Count Knight's Tour	hard	-	google
Count Pairs with Given Sum and XOR	easy	-	jane-street
Crossword Grid Validation	easy	-	palantir
Currency Exchange Problem as Shortest Path	medium	-	jane-street
De Bruijn Sequence	hard	-	LinkedIn
Describe and give an example of Ad-hoc, Parametric and Subtype polymorphism	medium	-	microsoft
Design a Sparse Array	easy	-	facebook
Design and implement Connect 4	hard	-	salesforce
Design hit counter with range queries	easy	-	riot-games
Design log Order records	easy	-	twitter amazon
Detect Cycle in Undirected Graph	easy	-	pandora
Determining the Existence of a Valid Secret Code in Mastermind Based on Given Guesses and Scores Guesses and Scores	medium	-	facebook
Distributed Wikipedia Crawler System Design	hard	-	google

Showing 1 to 50 of 281 results