All Problems

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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TitleDifficultyVideosCompanies
Swap two number in place without temporary variablesmedium-
Symmetric N-ary Tree Detectioneasy-
amazon
Team Dominance by Pass Successhard-
Ternary Search Tree Implementationeasy-
zillow
Tetranacci Numberseasy-
Three-Word Additive Cryptarithmetic Solvermedium-
google
Toggle a specified bit in a bit string without effecting other bitseasy-
Toggle the n-th biteasy-
Total sum excluding adjacent of a given node in BSTmedium-
Tower of Hanoimedium
Transform Array by Parityeasy-
Transformations Between Binary Tree Structuctures and Linked Listsmedium-
Transformed Arrayeasy-
Transitive Closure of a Grapheasy-
microsoft
Traveling Salesman Problemhard-
Trough index in a Valley arraymedium-
Turn off the rightmost 1-biteasy-
Turn off the rightmost contiguous string of 1’smedium-
Turn on the rightmost 0-biteasy-
Turning a bit off without affecting other bitseasy-
Twitter Codility Problem - Max Binary Gapeasy-
Two Number Missing in Range 1 to Nmedium-
Unbounded Knapsack Problemmedium-
Uniform Random Sampling of k Nodes in a Binary Treemedium-
Uniformly Shuffle Linked List Nodeshard-
apple
Unique 3-Digit Even Numberseasy-
Unique BSTs 3 - Count given node keys between m and nmedium-
Unique Paths in Grid - Count all paths moving right or down or diagonallymedium-
Unique Paths in Grid - Get all paths moving right or down with obstaclesmedium-
Unique Paths in Grid 1 - Count all paths moving right or downmedium
adobealibabaamazon
Unique Paths in Grid 1-2 - Get all paths moving right or downmedium-
Unique Paths in Grid 2 - Count all paths moving right or down with obstaclesmedium-
amazonapplebloomberg
Minimum Path Sum in matrixmedium-
adobeamazonapple
Unique Paths in Grid 2-3 - Get all paths moving in 4 directions with obstaclesmedium-
Unique Paths in Grid without crossing main diagonalmedium-
Unit Conversion Imedium-
Unit Conversion IImedium-
URL Query Stringsmedium-
URL Structuremedium-
Valid Numberhard-
adobeamazonapple
Plus One 1 - Given number as array plus oneeasy-
adobeamazonapple
Add Binary Stringseasy-
adobeamazonapple
Text Justificationhard-
airbnbamazonapple
Square root of an integereasy-
amazonapplebloomberg
Climbing Stairs - Take atmost 2 Stepseasy
adobealibabaamazon
Simplify Pathmedium-
adobeamazonbloomberg
Edit Distancemedium-
adobeamazonapple
Set Matrix Zerosmedium
adobeamazonapple
Search a 2D Matrix 1 - Elements sorted row-wise and first integer of each row is greater than last element of previous row is greater than last element of previous rowmedium-
adobeamazonapple
Dutch National Flag DNFmedium
amazonapplebloomberg
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