Design

Design

• 3508. Implement Router
• 3484. Design Spreadsheet
• 3408. Design Task Manager
• 3391. Design a 3D Binary Matrix with Efficient Layer Tracking
• 3369. Design an Array Statistics Tracker
• 3242. Design Neighbor Sum Service
• 2671. Frequency Tracker
• 2642. Design Graph With Shortest Path Calculator
• 2590. Design a Todo List
• 2526. Find Consecutive Integers from a Data Stream
• 2502. Design Memory Allocator
• 2424. Longest Uploaded Prefix
• 2408. Design SQL
• 2353. Design a Food Rating System
• 2349. Design a Number Container System
• 2336. Smallest Number in Infinite Set
• 2296. Design a Text Editor
• 2286. Booking Concert Tickets in Groups
• 2276. Count Integers in Intervals
• 2254. Design Video Sharing Platform
• 2241. Design an ATM Machine
• 2227. Encrypt and Decrypt Strings
• 2166. Design Bitset
• 2102. Sequentially Ordinal Rank Tracker
• 2080. Range Frequency Queries
• 2069. Walking Robot Simulation II
• 2043. Simple Bank System
• 2034. Stock Price Fluctuation
• 2013. Detect Squares
• 1993. Operations on Tree
• 1912. Design Movie Rental System
• 1865. Finding Pairs With a Certain Sum
• 1845. Seat Reservation Manager
• 1825. Finding MK Average
• 1804. Implement Trie II (Prefix Tree)
• 1797. Design Authentication Manager
• 1756. Design Most Recently Used Queue
• 1670. Design Front Middle Back Queue
• 1656. Design an Ordered Stream
• 1628. Design an Expression Tree With Evaluate Function
• 1622. Fancy Sequence
• 1603. Design Parking System
• 1600. Throne Inheritance
• 1586. Binary Search Tree Iterator II
• 1570. Dot Product of Two Sparse Vectors
• 1500. Design a File Sharing System
• 1483. Kth Ancestor of a Tree Node
• 1476. Subrectangle Queries
• 1472. Design Browser History
• 1429. First Unique Number
• 1396. Design Underground System
• 1381. Design a Stack With Increment Operation
• 1357. Apply Discount Every n Orders
• 1352. Product of the Last K Numbers
• 1348. Tweet Counts Per Frequency
• 1286. Iterator for Combination
• 1261. Find Elements in a Contaminated Binary Tree
• 1244. Design A Leaderboard
• 1206. Design Skiplist
• 1172. Dinner Plate Stacks
• 1166. Design File System
• 1157. Online Majority Element In Subarray
• 1146. Snapshot Array
• 1032. Stream of Characters
• 981. Time Based Key-Value Store
• 933. Number of Recent Calls
• 919. Complete Binary Tree Inserter
• 911. Online Election
• 901. Online Stock Span
• 900. RLE Iterator
• 895. Maximum Frequency Stack
• 855. Exam Room
• 745. Prefix and Suffix Search
• 732. My Calendar III
• 731. My Calendar II
• 729. My Calendar I
• 716. Max Stack
• 715. Range Module
• 707. Design Linked List
• 706. Design HashMap
• 705. Design HashSet
• 703. Kth Largest Element in a Stream
• 677. Map Sum Pairs
• 676. Implement Magic Dictionary
• 642. Design Search Autocomplete System
• 641. Design Circular Deque
• 635. Design Log Storage System
• 631. Design Excel Sum Formula
• 622. Design Circular Queue
• 604. Design Compressed String Iterator
• 588. Design In-Memory File System
• 535. Encode and Decode TinyURL
• 460. LFU Cache
• 449. Serialize and Deserialize BST
• 432. All O`one Data Structure
• 431. Encode N-ary Tree to Binary Tree
• 384. Shuffle an Array
• 381. Insert Delete GetRandom O(1) - Duplicates allowed
• 380. Insert Delete GetRandom O(1)
• 379. Design Phone Directory
• 362. Design Hit Counter
• 359. Logger Rate Limiter
• 355. Design Twitter
• 353. Design Snake Game
• 352. Data Stream as Disjoint Intervals
• 348. Design Tic-Tac-Toe
• 346. Moving Average from Data Stream
• 341. Flatten Nested List Iterator
• 308. Range Sum Query 2D - Mutable
• 307. Range Sum Query - Mutable
• 304. Range Sum Query 2D - Immutable
• 303. Range Sum Query - Immutable
• 297. Serialize and Deserialize Binary Tree
• 295. Find Median from Data Stream
• 288. Unique Word Abbreviation
• 284. Peeking Iterator
• 281. Zigzag Iterator
• 271. Encode and Decode Strings
• 251. Flatten 2D Vector
• 244. Shortest Word Distance II
• 232. Implement Queue using Stacks
• 225. Implement Stack using Queues
• 211. Design Add and Search Words Data Structure
• 208. Implement Trie (Prefix Tree)
• 173. Binary Search Tree Iterator
• 170. Two Sum III - Data structure design
• 155. Min Stack
• 146. LRU Cache