16 problems from real interviews.

Easy to hard, each tagged with where it was asked. Make the failing tests pass with AI.

On your machine

Run one for real

# Python
cd problems/07_Concurrency_Race && python3 -m pytest -q
# TypeScript (Node 24)
cd problems/05_Rate_Limiter_TS && node --test
# mock interview in the terminal
python3 interview.py 01_Line_Wrap

Every starter fails for its stated reason; a correct fix passes.