All Problems

924 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
Alternating Two-Instance Singleton Patternmedium-
google
Area of intersection of two rectangleseasy-
google
Bishop diagonally attack on chess boardmedium-
google
Check if any pair of rectangles overlapeasy-
google
Check if doubly linked list is palindromeeasy-
google
Closest pair of pointseasy-
google
Coin Change with Fewest Number of Coins Given Canonical System and Infinite Supplymedium-
google
Coins In a Line Gamemedium-
squaregoogle
Construct Binary Search Tree BST from Postorder Traversalmedium-
google
Count elements in range in sorted matrixhard-
google
Count Inversions - Count Smaller on Rightmedium-
google
Count Knight's Tourhard-
google
Design a data structure for generic deck of cardsmedium-
googleamazon
Distributed Wikipedia Crawler System Designhard-
google
Estimating the value of Pi using Monte Carlo methodmedium-
google
Find Deepest Node in a Binary Treeeasy-
googleuber
Find if there is a path between two vertices in a directed grapheasy-
googlefacebookamazon
Find the Index of the First Occurrence in a Stringeasy-
adobeamazonapple
Divide Two Integersmedium-
adobeamazonapple
Find the Shortest Path between 2 cells in boolean mazeeasy-
google
First Unique Character in a Stream of Charactersmedium-
amazongooglemicrosoft
Fix the variable capture in closuremedium-
google
m Coloring Problemmedium-
google
Two Sumeasy
adobeaetionaffirm
Add Two Numbers represented as Linked List in Reversed Ordermedium-
adobeaetionairbnb
Longest Substring Without Repeating Charactersmedium
adobealationalibaba
Median of Two Sorted Arrayshard-
adobeairbnbalibaba
Longest Palindromic Substringmedium
adobeairbnbalibaba
Reverse Integermedium-
adobeamazonapple
Convert String to Integer atoimedium-
adobeamazonapple
Palindrome Numbereasy
adobeamazonapple
Regular Expression Matchinghard-
adobeairbnbalibaba
Container With Most Watermedium
adobeamazonapple
Integer To Romanmedium-
adobeamazonapple
Roman To Integereasy
adobeamazonapple
Longest Common Prefix in array of stringeasy-
adobealibabaamazon
3Sum0 - Find three elements in an array that sum to a zeromedium
adobeakuna-capitalalibaba
3Sum - Closestmedium-
adobeamazonapple
Letter Combinations of a Phone Numbermedium-
amazonappleatlassian
4Summedium-
adobeamazonapple
Remove Nth Node From End of Listmedium
adobeamazonapple
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Generate Parenthesesmedium-
adobealibabaamazon
Largest value path in a directed graphhard-
google
Letter Tile Possibilitiesmedium
googlemicrosoft
Locking and unlocking resources represented as binary tree nodesmedium-
google
Longest subarray with distinct elementseasy-
google
Longest Substring with K Distinct Charactersmedium-
google
Low bandwidth almost similar file syncing algorithm between two computershard-
google
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