Lately, I came across a platform where programmers can practice problem-solving.
Exercism, as they say, is a well-organized platform having multiple tracks for the coders.
One must go and follow the Exercism way of problem-solving. The platform is intuitive in terms that it provides a way a share your solutions to a given set of problems and get the feedback if required.
One can opt for "Practice Mode" or "Mentor Mode" depending upon the preferences.
So if you want to learn and practice problem-solving, I would suggest you follow Exercism.
This platform provides a lot of tracks for programming languages, and tools.
Happy Learning and Keep Learning !!