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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
4 Keys Keyboardmedium-
googlemicrosoft
Find Duplicate Subtreesmedium-
amazonbloombergfacebook
Two Sum 4 - Input is Binary Search Treeeasy-
amazonfacebookgoogle
Maximum Binary Treemedium-
amazonfacebookgoogle
Print Binary Treemedium-
facebooklinkedinmicrosoft
Coin Pathhard-
google
Robot Return to Origineasy-
amazongoldman-sachsgoogle
Find K Closest Elementsmedium-
amazonapplebloomberg
Split Array into Consecutive Subsequencesmedium-
google
Remove 9hard-
googlehouzz
Image Smoothereasy-
amazonapple
Maximum Width of Binary Treemedium-
amazonbloombergebay
Equal Tree Partitionmedium-
amazonfacebook
Strange Printerhard-
netease
Non-decreasing Arraymedium-
adobeamazonebay
Path Sum IVmedium-
alibaba
Beautiful Arrangement IImedium-
google
Kth Smallest Number in Multiplication Tablehard-
googleuber
Trim a Binary Search Tree BSTmedium-
adobeamazonapple
Maximum Swapmedium
amazonapplebytedance
Second Minimum Node In a Binary Treeeasy-
amazonlinkedinmicrosoft
Bulb Switcher IImedium-
microsoft
Number of Longest Increasing Subsequencemedium-
amazonbloombergfacebook
Longest Continuous Increasing Subsequenceeasy-
amazonapplefacebook
Cut Off Trees for Golf Eventhard-
amazon
Implement Magic Dictionarymedium-
facebookgooglemicrosoft
Map Sum Pairsmedium-
akuna-capital
Valid Parenthesis Stringmedium-
alibabaamazonbloomberg
24 Gamehard-
amazonfacebookgoogle
Valid Palindrome 2easy-
atlassianfacebookgoogle
Next Closest Timemedium-
adobeamazonbytedance
Baseball Gameeasy-
amazongoogle
K Empty Slotshard-
amazongooglemicrosoft
Redundant Connectionmedium-
amazongoogle
Redundant Connection IIhard-
google
Repeated String Matchmedium-
adobeamazonfacebook
Longest Univalue Pathmedium-
amazonapplegoogle
Knight Probability in Chessboardmedium-
amazonapplefacebook
Maximum Sum of 3 Non-Overlapping Subarrayshard-
facebookgoogle
Employee Importancemedium-
amazongoogleuber
Stickers to Spell Wordhard-
facebookixl
Top K Frequent Wordsmedium-
adobeamazonapple
Binary Number with Alternating Bitseasy-
yahoo
Number of Distinct Islandsmedium-
amazonapplebloomberg
Max Area of Islandmedium-
adobeaffirmamazon
Count Binary Substringseasy-
helix
Degree of an Arrayeasy-
citrixge-digitalixl
Partition to K Equal Sum Subsetsmedium-
amazonbytedanceebay
Falling Squareshard-
amazonsquareuber
Search in a Binary Search Treeeasy-
adobeapplegoogle
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