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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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Title	Difficulty	Videos	Companies
Design hit counter with range queries	easy	-	riot-games
Design log Order records	easy	-	twitter amazon
Design Spreadsheet	medium	-
Design Task Manager	medium	-
Design the classes and data structures for a call center	medium	-
Design Underground System	medium	-
Detect Cycle in Directed Graph	medium	-
Detect Cycle in Undirected Graph	easy	-	pandora
Determine if a string has all unique characters	medium	-
Determine whether two lines would intersect on a Cartesian plane	easy	-
Determining the Existence of a Valid Secret Code in Mastermind Based on Given Guesses and Scores Guesses and Scores	medium	-	facebook
Digit Operations to Make Two Integers Equal	medium	-
Disjoint subsequences in an array with maximum difference	medium	-
Distributed Wikipedia Crawler System Design	hard	-	google
Divide array into two subsets with minimum difference	hard	-	microsoft
DNA Pattern Recognition	medium	-
Dodgeball Team Division	hard	-	twitter
Dot Product of 2 Sparse Vectors	medium	-
Double Stacks	easy	-
Duplicate each node in a binary search tree and add as its left child	easy	-
Eat Pizzas!	medium	-
Edge-Disjoint Hamiltonian Circuits and the Round Table Seating ProblemShow thinking	medium	-
Edit Distance - Insert, Delete, no replace	medium	-
Efficient Conversion Between Imperial Distance Units	easy	-	jane-street
Election Voting Machine Monitor	easy	-	uber
Encode XML	medium	-
Equal Average Partition	medium	-	amazon
Equal Sum Grid Partition I	medium	-
Equal Sum Grid Partition II	hard	-
Estimating the value of Pi using Monte Carlo method	medium	-	google
Euler Graphs - Origin of Graph Theory - Seven bridges of Konigsberg	medium	-
Evaluate an expression tree and generate a parenthesised form	medium	-
Evaluation of Arithmetic Expression Tree	medium	-	microsoft
Expected number of rounds to reach one remaining coin	easy	-	microsoft
Explain (n & (n-1)) == 0	easy	-
Explain x & (-x)	easy	-
Expression Tree Definition	medium	-
Extended Euclidean Algorithm using modulo operator	medium	-
External Sorting of integers	medium	-	amazon
Factorial of a Number	easy	-
Fancy Sequence	hard	-
Fast way to multiply a number by 7	easy	-
Fibonacci Iterator	easy	-
Fibonacci Numbers	medium	-
Fill a Special Grid	medium	-
Find a line to cut two squares in half	easy	-
Find a line which passes the most number of points	medium	-
Find a Value of a Mysterious Function Closest to Target	hard	-
Find All Conflicting Appointments	easy	-
Find all divisors of a natural number	easy	-

Showing 201 to 250 of 4301 results

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