All Problems

16 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
Longest Palindromic Substringmedium
adobeairbnbalibaba
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
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Merge K Sorted Listshard
adobeairbnbalibaba
Combination Sum 1medium
airbnbakuna-capitalamazon
Minimum Window Substringhard
adobeairbnbamazon
Convert Sorted Array to height-balanced Binary Search Treeeasy
airbnbamazonapple
Single Number 1 - All elements except one occur twiceeasy
adobeairbnbamazon
Reverse Bitseasy
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House Robbermedium
adobeairbnbamazon
Design Add and Search Words Data Structuremedium
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Word Search 2 - Return All Wordshard
airbnbamazonapple
Contains Duplicate 1 - Check if array has duplicateseasy
adobeairbnbamazon
Lowest Common Ancestor of a Binary Treemedium
adobeairbnbamazon
Coin Change with Fewest Number of Coins Given Infinite Supplymedium
adobeaffirmairbnb