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41 problems total

Array (174)Sorting (45)Depth First Search (44)Tree (41)Breadth First Search (35)Linked List (28)Stack (27)Recursion (18)Graph Theory (12)Monotonic Stack (8)Queue (6)Shortest Path (2)

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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
Flatten 2D Vector	medium	-	airbnb apple facebook
Zigzag Iterator	medium	-	amazon apple cruise-automation
Peeking Iterator	medium	-	amazon apple atlassian
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
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
Encode and Decode TinyURL	medium	-	adobe amazon bloomberg
Design Circular Queue	medium	-	airbnb amazon apple
Design Circular Deque	medium		facebook
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 HashMap	easy	-	adobe amazon apple
Max Stack	hard	-	amazon bloomberg facebook
Prefix and Suffix Search	hard	-	facebook google
Exam Room	medium	-	amazon facebook google
Time Based Key-Value Store	medium	-	amazon apple atlassian
Two City Scheduling	medium	-	amazon bloomberg facebook
Stream of Characters	hard	-	amazon facebook google
Snapshot Array	medium	-	amazon apple ebay
Shift 2D Grid	easy	-	amazon facebook
Apply Discount Every n Orders	medium	-	facebook
Number of Subsequences That Satisfy the Given Sum Condition	medium	-	facebook google