All Problems

39 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
Two Sumeasy
adobeaetionaffirm
Median of Two Sorted Arrayshard-
adobeairbnbalibaba
Longest Common Prefix in array of stringeasy-
adobealibabaamazon
3Sum0 - Find three elements in an array that sum to a zeromedium
adobeakuna-capitalalibaba
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Search in Rotated Sorted Arraymedium
adobealibabaamazon
Find first and last positions of target element in sorted arraymedium-
airbnbamazonapple
Trapping Rain Waterhard-
adobeaffirmairbnb
Group Anagramsmedium
adobeaffirmamazon
Maximum Subarray Summedium
adobealibabaamazon
Spiral Matrix 1 - Returnmedium
adobeamazonapple
Merge Overlapping Intervalsmedium
adobealibabaamazon
Minimum Window Substringhard
adobeairbnbamazon
Validate Binary Search Treemedium
adobeamazonapple
Symmetric Binary Treeeasy-
adobealibabaamazon
Best Time To Buy And Sell Stock 1 - only one transactioneasy
adobeakuna-capitalalibaba
Copy List with Random Pointermedium-
adobeamazonapple
Design LRU Cachemedium-
adobealibabaamazon
Min Stackmedium-
adobeamazonapple
Number of Islandsmedium
adobeaffirmalibaba
Reverse Linked Listeasy
adobealibabaamazon
Lowest Common Ancestor of a Binary Treemedium
adobeairbnbamazon
Product of Array Except Selfmedium
adobeamazonapple
Maximum Intervals Overlap Countmedium
amazonappleatlassian
Integer to English Wordshard
amazonapplebarclays
Coin Change with Fewest Number of Coins Given Infinite Supplymedium
adobeaffirmairbnb
Design Hit Countermedium-
affirmamazonapple
Combination Sum 4 - All permutationsmedium-
amazonfacebookgoogle
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowedmedium-
adobeaffirmamazon
Degree of an Arrayeasy-
citrixge-digitalixl
Asteroid Collisionmedium-
amazonbytedanceebay
Special Binary Stringhard-
citrixcourseraquip
Consecutive Numbers Sumhard-
citadelcitrixindeed
K closest Points to Originmedium-
amazonappleasana
Pairs of Songs With Total Durations Divisible by 60medium-
adobeamazoncitrix
Divisor Gameeasy-
bloomberggooglevisa
Maximum Number of Events That Can Be Attendedmedium-
visa
Create Target Array in the Given Ordereasy-
visa