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0/25 solved
LRU Cache
MEDIUM
Find Median from Data Stream
HARD
Implement Trie (Prefix Tree)
MEDIUM
Serialize and Deserialize Binary Tree
HARD
Insert Delete GetRandom O(1)
MEDIUM
Binary Search Tree Iterator
MEDIUM
Implement Queue using Stacks
EASY
Design Add and Search Words Data Structure
MEDIUM
Kth Largest Element in a Stream
EASY
Range Sum Query 2D - Immutable
MEDIUM
Flatten Nested List Iterator
MEDIUM
Range Sum Query - Mutable
MEDIUM
Design Circular Queue
MEDIUM
Serialize and Deserialize BST
MEDIUM
Range Sum Query - Immutable
EASY
Insert Delete GetRandom O(1) - Duplicates allowed
HARD
Prefix and Suffix Search
HARD
Design Tic-Tac-Toe
MEDIUM
Max Stack
HARD
Stream of Characters
HARD
Dot Product of Two Sparse Vectors
MEDIUM
Complete Binary Tree Inserter
MEDIUM
Binary Search Tree Iterator II
MEDIUM
Unique Word Abbreviation
MEDIUM
Apply Discount Every n Orders
MEDIUM