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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
Valid Palindromeeasy
adobeamazonapple
Word Ladder 2 - Get all the laddershard-
amazonapplebloomberg
Word Ladder 1 - Get Ladder Lengthhard-
affirmamazonapple
Longest Consecutive Sequencemedium
adobeamazonapple
Palindrome Partitioning IIhard-
amazongoogle
Sum Root to Leaf Numbersmedium-
amazonbloombergebay
Surrounded Regionsmedium-
amazonebayfacebook
Palindrome Partitioningmedium
adobeamazonbloomberg
Clone Undirected Graphmedium
amazonapplefacebook
Gas Stationmedium-
amazonapplebloomberg
Candy distributionhard-
amazonapplegoogle
Single Number 1 - All elements except one occur twiceeasy
adobeairbnbamazon
Single Number 2 - All elements except one occur thricemedium-
adobeamazonfacebook
Copy List with Random Pointermedium-
adobeamazonapple
Word Break 1 - Check if word is breakablemedium
adobeamazonapple
Word Break 2 - Construct a sentencehard
amazonappleaudible
Linked List Cycle 1 - Detect Cycleeasy
adobeamazonapple
Linked List Cycle 2 - Find Start of a Cyclemedium-
adobeamazonapple
Reorder List such that i-th element points to n-i-th elementmedium
adobeamazonapple
Binary Tree Preorder Traversaleasy-
amazonbloombergcisco
Binary Tree Postorder Traversaleasy-
adobeamazonfacebook
Design LRU Cachemedium-
adobealibabaamazon
Insertion Sort on Listmedium-
bloomberggooglemicrosoft
Sort a Linked Listmedium-
adobeamazonbytedance
Maximum Points on a Linehard-
amazonapplebloomberg
Evaluate Reverse Polish Notationmedium-
amazonatlassianfacebook
Reverse Words in a Stringmedium-
amazonapplebloomberg
Maximum Product Subarraymedium
adobeakuna-capitalalibaba
Find Minimum in Rotated Sorted Arraymedium
amazonapplebloomberg
Find Minimum in Rotated Sorted Array 2 - Duplicates allowedhard-
adobeamazonfacebook
Min Stackmedium-
adobeamazonapple
Binary Tree Upside Downmedium-
googlelinkedin
Read N Characters Given Read4easy-
facebookgoogle
Read N Characters Given Read4 2 - Call Multiple Timeshard-
amazonbloombergfacebook
Longest Substring with At Most Two Distinct Charactersmedium-
adobeamazonfacebook
Intersection of Two Linked Listseasy-
airbnbalibabaamazon
Friend Words - One Edit Distancemedium-
amazonfacebookgoogle
Find Peak Element in a Given Arraymedium-
amazonapplebloomberg
Missing Rangeseasy-
amazonfacebookgoogle
Maximum Gapmedium-
amazon
Compare Version Numbersmedium
amazonapplearista-networks
Fraction to Recurring Decimalmedium-
airbnbamazonapple
2Sum 2 – Input array is sortedmedium
amazonapplebloomberg
Excel Sheet Column Titleeasy-
adobeapplefacebook
Majority Element - Boyer–Moore majority vote algorithmeasy-
adobeamazonapple
Majority Element 1 - with n by 2 definitioneasy-
facebookgooglemicrosoft
Two Sum 3 - Data structure designeasy-
linkedin
Excel Sheet Column Numbereasy-
amazonapplebloomberg
Number of trailing zeros in a factorialmedium-
amazonbloombergfacebook
Binary Search Tree BST Inorder Iteratormedium-
alibabaamazonapple
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