Dashboard Questions Topics Companies Sheets

Design

Topic

123 coding problems covering Design concepts. Master this topic and improve your problem-solving skills.

123

Problems

Easy

Medium

Hard

Difficulty

All123 Easy14 Medium79 Hard30

Title	Solve	Difficulty	Companies	Topics
715. Range Module	Solve	Hard	Amazon+6	Design Ordered Set+1
716. Max Stack	Solve	Hard	Amazon+6	Design Doubly-Linked List+3
729. My Calendar I	Solve	Medium	Amazon+2	Array Binary Search+3
731. My Calendar II	Solve	Medium	Google+1	Array Binary Search+4
732. My Calendar III	Solve	Hard	Amazon+1	Binary Search Design+3
745. Prefix and Suffix Search	Solve	Hard	Facebook+2	Array Design+3
855. Exam Room	Solve	Medium	Google+3	Design Heap (Priority Queue)+1
895. Maximum Frequency Stack	Solve	Hard	Adobe+7	Design Hash Table+2
900. RLE Iterator	Solve	Medium	Google	Array Counting+2
901. Online Stock Span	Solve	Medium	Adobe+2	Data Stream Design+2
911. Online Election	Solve	Medium	Atlassian+1	Array Binary Search+2
919. Complete Binary Tree Inserter	Solve	Medium	Facebook+3	Binary Tree Breadth-First Search+2
933. Number of Recent Calls	Solve	Easy	Bloomberg+1	Data Stream Design+1
981. Time Based Key-Value Store	Solve	Medium	Amazon+5	Binary Search Design+2
1032. Stream of Characters	Solve	Hard	Amazon+3	Array Data Stream+3
1146. Snapshot Array	Solve	Medium	Google+2	Array Binary Search+2
1157. Online Majority Element In Subarray	Solve	Hard	Nutanix	Array Binary Indexed Tree+3
1166. Design File System	Solve	Medium	Google	Design Hash Table+2
1172. Dinner Plate Stacks	Solve	Hard	-	Design Hash Table+2
1206. Design Skiplist	Solve	Hard	eBay+5	Design Linked List
1244. Design A Leaderboard	Solve	Medium	Amazon+4	Design Hash Table+1
1261. Find Elements in a Contaminated Binary Tree	Solve	Medium	Google	Binary Tree Breadth-First Search+4
1286. Iterator for Combination	Solve	Medium	Uber	Backtracking Design+2
1348. Tweet Counts Per Frequency	Solve	Medium	Twitter	Binary Search Design+3
1352. Product of the Last K Numbers	Solve	Medium	Amazon+3	Array Data Stream+3
1357. Apply Discount Every n Orders	Solve	Medium	Facebook	Array Design+1
1381. Design a Stack With Increment Operation	Solve	Medium	TikTok	Array Design+1
1396. Design Underground System	Solve	Medium	Amazon+1	Design Hash Table+1
1429. First Unique Number	Solve	Medium	Amazon+1	Array Data Stream+3
1472. Design Browser History	Solve	Medium	Amazon+3	Array Data Stream+4
1476. Subrectangle Queries	Solve	Medium	Nuro	Array Design+1
1483. Kth Ancestor of a Tree Node	Solve	Hard	Adobe+3	Binary Search Breadth-First Search+4
1500. Design a File Sharing System	Solve	Medium	Twitch	Data Stream Design+3
1570. Dot Product of Two Sparse Vectors	Solve	Medium	Amazon+4	Array Design+2
1586. Binary Search Tree Iterator II	Solve	Medium	Facebook	Binary Search Tree Binary Tree+4
1600. Throne Inheritance	Solve	Medium	Google	Depth-First Search Design+2
1603. Design Parking System	Solve	Easy	Amazon	Counting Design+1
1622. Fancy Sequence	Solve	Hard	Google	Design Math+1
1628. Design an Expression Tree With Evaluate Function	Solve	Medium	Amazon	Array Binary Tree+4
1656. Design an Ordered Stream	Solve	Easy	Bloomberg	Array Data Stream+2
1670. Design Front Middle Back Queue	Solve	Medium	Amazon	Array Data Stream+3
1756. Design Most Recently Used Queue	Solve	Medium	Google	Array Binary Indexed Tree+4
1797. Design Authentication Manager	Solve	Medium	Twitter	Design Doubly-Linked List+2
1804. Implement Trie II (Prefix Tree)	Solve	Medium	Apple+1	Design Hash Table+2
1825. Finding MK Average	Solve	Hard	Google	Data Stream Design+3
1845. Seat Reservation Manager	Solve	Medium	Dropbox	Design Heap (Priority Queue)
1865. Finding Pairs With a Certain Sum	Solve	Medium	Quora	Array Design+1
1912. Design Movie Rental System	Solve	Hard	Flipkart	Array Design+3
1993. Operations on Tree	Solve	Medium	Google+1	Array Breadth-First Search+4
2013. Detect Squares	Solve	Medium	Amazon+1	Array Counting+2