Implementations in C++

1. Tic Tac Toe implementation (+ unit tests) according to this specification.
2. Parking Lot implementation according to this specification.
3. Multithreaded Message Queue. It is C++ implementation of this Java solution.
4. In-Memory Key-Value Store implementation according to this specification.
5. Cache. It is C++ implementation of this Java solution.

Implementations in Python

1. Meeting Booking
2. Splitwise implementation according to this specification.
3. Cab Booking implementation according to this specification.