coding
Easy
Verified
Label Co-occurrence Finder
Category: String coding problemYou are given a list of label groups and a list of required labels. Each group is a list of strings. A group is considered valid if it contains every...Input: Array of strings
Output: Array
coding
Medium
Verified
Region Grid Coloring
Category: Grid/matrix coding problemYou are given an
M x N grid of security zones. Each cell contains one of the following values: - 1 -- the zone is cleared - 0 -- the zone...Input: 2D gridOutput: Computed result
coding
Medium
Verified
Parallel Task Batching
Category: Graph coding problemA pipeline must execute a set of tasks with dependency constraints. Each dependency
[A, B] means task A must complete before task B can start....Input: Graph (nodes and edges)Output: Computed result
coding
Medium
Verified
Maximum Interval Overlap
Category: Interval-based coding problemYou are given a list of closed intervals on the number line, where each interval
[start, end] includes both endpoints. Find the maximum number of...Input: ListOutput: Integer
coding
Hard
Verified
Interval Coverage Counter
Category: Interval-based coding problemGiven a list of closed intervals on the integer number line, build a data structure that efficiently answers point-coverage queries. A closed...Input: List
Output: Computed result
coding
Easy
Verified
[CodeSignal] Movie Group Ranker
Category: Array coding problemYou are building a movie recommendation system. Given a source movie a user liked, you receive: - An array
scores where scores[i] is the...Input: ArrayOutput: Integer
coding
Easy
Verified
[CodeSignal] One-Hot Encoder
Category: Matrix coding problemGiven an integer array
arr, return its one-hot encoded matrix as a 2D array. In a one-hot encoding: - Each row represents one element from arr. -...Input: Matrix (2D array)Output: Computed result
coding
Medium
Verified
Event Rate Limiter
Category: String coding problemDesign a rate-limited event logger for a streaming system. Events arrive in non-decreasing timestamp order. The system must suppress an event name if...Input: String
Output: Printed output
coding
Medium
Verified
Viewing History Friends
Category: Algorithm coding problemA streaming platform groups customers together based on shared viewing habits. You receive: -
customerIds - a list of distinct customer IDs -...Input: ListOutput: Array
coding
Hard
Verified
Weight-Based Cache
Category: String coding problem# Weight-Based CacheInput: List
Output: Computed result
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