Have you had experience using third-party or built-in libraries in projects?

Yes, in C/C++ projects, it is common to use many third-party and built-in libraries to solve various tasks. For example:

• The C++ Standard Library (STL) for working with containers, algorithms, strings.
• Boost — a set of extended libraries for working with threads, file systems, regular expressions, and more.
• Qt — for developing graphical interfaces.
• OpenCV — for image and video processing.

Using libraries allows you not to write everything from scratch, improving the quality and speed of development. It is important to know how to properly connect, configure, and use libraries, as well as understand their licensing restrictions.