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522 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)

All Topics(4301)Database(0)Java(0)Networking(0)Object Oriented Design(1)System Design(0)Algorithms(522)

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Title	Difficulty	Videos	Companies
0-1 Knapsack Problem	medium	-
0-1 Knapsack with Gold Bars	medium	-
3Sum - Classic	medium	-	microsoft
8-Puzzle Solver	hard	-	airbnb
Add one to a number without using plus or minus sign	easy	-
Add Two Numbers represented as Linked List	medium	-
Add two numbers without using the plus operator	hard	-
Approximate Median in Sub-linear Time	medium	-	dropbox
Arrange Given Number To Form The Biggest Number Possible	medium	-	uber
Array With Elements Not Equal to Average of Neighbors	medium	-
Array-based Trie Implementation	medium	-
Autocomplete Suggestion System	medium	-	twitter
Balanced delimiters in an expression	easy	-	uber
Basic Euclidean Algorithm to find GCD of two numbers using modulo operator	medium	-
Binary Tree Bottom View	medium	-	yelp
Binary Tree Left Side View	medium	-
Binary Tree Level Order Traversal	medium		microsoft
Binary Tree Top View	medium	-
Boolean Parenthesization Problem	hard	-	quantcast
Boyer-Moore String Searching	medium	-
Brace Expansion	medium	-
Buildings with sunset view	medium	-	mailchimp
Calculate Rolling Hashcode for String	medium	-
Calculate the number of valid stack permutations	medium	-
Catalan Numbers	medium	-
Check if a string contains an anagram of another string	medium	-
Check if any pair of rectangles overlap	easy	-	google
Check if Array is Consecutive Integers	medium	-
Check if Array is Consecutive Positive Integers	easy	-
Check if doubly linked list is palindrome	easy	-	google
Check if Intervals Overlap	easy	-
Check if words chain to form a circle	medium	-	dropbox
Chess King Check Detector	hard	-	Oracle
Circus tower sorting	medium	-
Closest Equal Element Queries	medium	-
Coin Change Problem Family Guide	medium	-
Construct ancestor matrix from a binary tree	medium	-
Convert an infix expression to postfix	medium	-
Count frequency of target element in sorted array	medium	-
Count Knight's Tour	hard	-	google
Count Occurrences of Anagram	medium	-
Create linked lists of all the nodes at each depth for a Binary Tree	medium	-
Decode a string to all valid interpretations	medium	-	uber
Deepest Left Node in a Binary Tree	medium	-
Design hit counter with range queries	easy	-	riot-games
Detect Cycle in Undirected Graph	easy	-	pandora
Divide array into two subsets with minimum difference	hard	-	microsoft
Edit Distance - Insert, Delete, no replace	medium	-
Election Voting Machine Monitor	easy	-	uber
Evaluation of Arithmetic Expression Tree	medium	-	microsoft

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