From Top 10 algorithms in Interview Questions by Geeks for Geeks. My comments on the .cpp files are in ALL CAPS. I May have deleted or edited some comments from GFG for my own better understanding.
Exercises from Google for Education: C++ site. Some worked-out problems.
Basic but interesting / valuable C++ worked-out exercises for problems from HackerRank
-
absolute-beginner
-
dev-to
-
ou