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166 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)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3944)

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Title	Difficulty	Videos	Companies
Amount of New Area Painted Each Day	hard	-
Binary Tree Path Sum - Find all paths between any two nodes	medium	-
Brace Expansion	medium	-
Check if words chain to form a circle	medium	-	dropbox
De Bruijn Sequence	hard	-	LinkedIn
Decode a string to all valid interpretations	medium	-	uber
Determining the Existence of a Valid Secret Code in Mastermind Based on Given Guesses and Scores Guesses and Scores	medium	-	facebook
Find Unique Binary String	medium
Generate All Strings of n bits	medium	-
Knight's Tour	medium	-
kSum	medium	-
m Coloring Problem	medium	-	google
Letter Combinations of a Phone Number	medium	-	amazon apple atlassian
Generate Parentheses	medium	-	adobe alibaba amazon
Letter Tile Possibilities	medium		google microsoft
List Combinations - Generate unique combinations from list selecting 1 element from each	medium	-
Max Sum of Two Coupled Corner-to-Corner Grid Paths	medium	-
Maximum Number of Matching Indices After Right Shifts	easy	-
Maximum Product of the Length of Two Palindromic Subsequences	medium	-
Minimum Difference Between Highest and Lowest of K Scores	easy	-
Minimum Time to Break Locks I	medium	-
Permutations III	medium	-
Print All Combinations of subset of size K from Given Array	medium	-
Return all diagonals of a rectangular two-dimensional matrix	medium	-
Rotting Oranges	medium	-
Search Word in Root-to-Leaf Word Tree	easy	-
Solve Magnet Puzzle	hard	-
Splitting a String Into Descending Consecutive Values	medium	-
Subset Sum 1 - Is there a subset?	medium	-
Sudoku Solver	hard	-	adobe amazon apple
Combination Sum 1	medium		airbnb akuna-capital amazon
Combination Sum 2 - Cant Reuse same element	medium	-	adobe amazon apple
Permutations of Array 1	medium	-	adobe amazon apple
Permutations of Array 2 - Array has duplicates	medium	-	adobe amazon apple
N-Queens	hard	-	adobe amazon apple
N-Queens 2 - Count number of distinct solutions	hard	-	amazon zenefits
Three-Word Additive Cryptarithmetic Solver	medium	-	google
Unique Paths in Grid - Get all paths moving right or down with obstacles	medium	-
Unique Paths in Grid 1-2 - Get all paths moving right or down	medium	-
Unique Paths in Grid 2-3 - Get all paths moving in 4 directions with obstacles	medium	-
Combinations Problem	medium	-
Subsets 1	medium		adobe amazon apple
Word Search 1 - Find if word exists	medium		adobe amazon apple
Gray Code	medium	-	amazon apple microsoft
Subsets 2	medium	-	amazon bloomberg facebook
Restore IP Addresses	medium	-	adobe amazon apple
Unique BSTs 2 - Generate	medium	-	adobe amazon apple
Path Sum 2 - find all root to leaf paths	medium	-	adobe amazon apple
Word Ladder 2 - Get all the ladders	hard	-	amazon apple bloomberg
Palindrome Partitioning	medium		adobe amazon bloomberg

Showing 1 to 50 of 166 results