PrepFlow
Jobs
ATS Checker
Companies
DSA Sheets
Compiler
PrepFlow
Sign in
Login Required!
You need to log in to access your saved progress.
Companies
Google
Design
Design
0/42 solved
LRU Cache
MEDIUM
Find Median from Data Stream
HARD
Implement Trie (Prefix Tree)
MEDIUM
Serialize and Deserialize Binary Tree
HARD
Binary Search Tree Iterator
MEDIUM
Design Add and Search Words Data Structure
MEDIUM
Implement Stack using Queues
EASY
LFU Cache
HARD
Design HashMap
EASY
Range Sum Query 2D - Immutable
MEDIUM
Time Based Key-Value Store
MEDIUM
Range Sum Query - Mutable
MEDIUM
My Calendar I
MEDIUM
Design HashSet
EASY
Snapshot Array
MEDIUM
Design Search Autocomplete System
HARD
Design Hit Counter
MEDIUM
My Calendar III
HARD
Kth Ancestor of a Tree Node
HARD
Peeking Iterator
MEDIUM
Logger Rate Limiter
EASY
Moving Average from Data Stream
EASY
Range Module
HARD
Design In-Memory File System
HARD
Product of the Last K Numbers
MEDIUM
Iterator for Combination
MEDIUM
Shuffle an Array
MEDIUM
Exam Room
MEDIUM
Online Election
MEDIUM
Find Elements in a Contaminated Binary Tree
MEDIUM
Range Sum Query 2D - Mutable
MEDIUM
Design A Leaderboard
MEDIUM
RLE Iterator
MEDIUM
Flatten 2D Vector
MEDIUM
Zigzag Iterator
MEDIUM
Online Majority Element In Subarray
HARD
Finding MK Average
HARD
Design Compressed String Iterator
EASY
Fancy Sequence
HARD
Design Phone Directory
MEDIUM
Design Most Recently Used Queue
MEDIUM
Unique Word Abbreviation
MEDIUM