Programming Challenges
Pick a task and start coding with AI feedback.
Language / Framework
Difficulty
Tags
Character Frequency Sorter
C#
medium
algorithms
data structures
linq
string manipulation
dictionary
Implement a Thread-Safe Fixed-Size Blocking Queue
Java
medium
concurrency
data structures
blocking queue
synchronization
multithreading
Concurrent LRU Cache Implementation
Kotlin
hard
concurrency
cache
lru
data structures
thread safety
senior