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67 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)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3944)

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Title	Difficulty	Videos	Companies
Design LRU Cache	medium	-	adobe alibaba amazon
Min Stack	medium	-	adobe amazon apple
Binary Search Tree BST Inorder Iterator	medium	-	alibaba amazon apple
Implement Trie	medium		amazon apple bloomberg
Design Add and Search Words Data Structure	medium		airbnb amazon apple
Implement stack using queues	easy	-	amazon bloomberg citadel
Implement Queue using Stacks	easy	-	amazon apple bloomberg
Flatten 2D Vector	medium	-	airbnb apple facebook
Encode and Decode Strings	medium		bloomberg google microsoft
Zigzag Iterator	medium	-	amazon apple cruise-automation
Peeking Iterator	medium	-	amazon apple atlassian
Unique Word Abbreviation	medium	-	google
Find Median from Data Stream	hard		adobe amazon apple
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Range Sum Query - Immutable	easy	-	amazon bloomberg facebook
Range Sum Query 2D - Immutable	medium	-	amazon apple cruise-automation
Range Sum Query – Mutable	medium	-	amazon facebook google
Range Sum Query 2D - Mutable	medium	-	facebook google microsoft
Flatten Nested List Iterator	medium	-	airbnb amazon apple
Moving Average of Last N numbers in a Stream	easy	-	amazon appdynamics bloomberg
Design Tic-Tac-Toe	medium	-	amazon apple bloomberg
Data Stream as Disjoint Intervals	hard	-	amazon facebook google
Design Snake Game	medium	-	amazon apple bloomberg
Logger Rate Limiter	easy	-	amazon apple atlassian
Design Hit Counter	medium	-	affirm amazon apple
Design Phone Directory	medium	-	dropbox google microsoft
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowed	medium	-	adobe affirm amazon
Insert Delete Search and GetRandom in Constant Time 2 - Duplicates allowed	hard	-	affirm amazon apple
Shuffle an Array	medium	-	amazon apple bloomberg
All O`one Data Structure	hard		amazon bloomberg facebook
Serialize and Deserialize Binary Search Tree BST	medium	-	amazon bytedance ebay
LFU Cache	hard	-	adobe alibaba amazon
Encode and Decode TinyURL	medium	-	adobe amazon bloomberg
Design Compressed String Iterator	easy	-	amazon google
Design Circular Queue	medium	-	airbnb amazon apple
Design Log Storage System	medium	-	amazon google snapchat
Design Search Autocomplete System	hard	-	amazon apple bloomberg
Implement Magic Dictionary	medium	-	facebook google microsoft
Kth Largest Element in a Stream	easy		adobe amazon apple
Design Hashset	easy	-	amazon google
Design HashMap	easy	-	adobe amazon apple
Range Module	hard	-	amazon coupang google
Max Stack	hard	-	amazon bloomberg facebook
My Calendar 1	medium	-	amazon apple google
My Calendar 2	medium	-	amazon google
My Calendar 3	hard	-	amazon google
Prefix and Suffix Search	hard	-	facebook google
Exam Room	medium	-	amazon facebook google
Maximum Frequency Stack	hard	-	amazon apple bloomberg
RLE Iterator	medium	-	amazon google wish

Showing 1 to 50 of 67 results