All Problems

25 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 Substring Without Repeating Charactersmedium
adobealationalibaba
Longest Palindromic Substringmedium
adobeairbnbalibaba
3Sum0 - Find three elements in an array that sum to a zeromedium
adobeakuna-capitalalibaba
4Summedium-
adobeamazonapple
Valid Parentheseseasy
adobeairbnbakuna-capital
Merge Two Sorted Linked Listseasy
adobeairbnbalibaba
Generate Parenthesesmedium-
adobealibabaamazon
Next Permutationmedium-
adobeamazonapple
Longest Valid Parentheseshard-
adobeamazonapple
Search in Rotated Sorted Arraymedium
adobealibabaamazon
Maximal Rectanglehard-
adobeamazonbloomberg
Binary Tree Traversal - Zigzag Level Order Traversalmedium-
amazonapplebloomberg
Word Ladder 1 - Get Ladder Lengthhard-
affirmamazonapple
Reverse Bitseasy
airbnbamazonapple
Burst Balloonshard-
adobeamazonfacebook
Continuous Subarray Summedium
amazonbytedancefacebook
Subtree of Another Treeeasy
amazonbloombergebay
Two Sum 4 - Input is Binary Search Treeeasy-
amazonfacebookgoogle
Middle of the linked listeasy
adobeamazonapple
Vertical Order Traversal of a Binary Treehard-
adobeamazonbloomberg
Largest 1-Bordered Squaremedium-
amazonsamsung
Number of Paths with Max Scorehard-
samsung
Number of Nodes in the Sub-Tree With the Same Labelmedium-
samsung
Water Plant Infrastructure Optimizationmedium-
samsung