The story with these is that they solve three leetcode problems in the seemingly little-used Concurrency problem category. In prior years I did these exercises for learning concurrency in Go and Python, and found them to be effective for that purpose, so why not try them in Flow? Sure enough, writing out these solutions was pretty effective. The techniques in tutorial.actor.cpp in the same directory can be used, but having to think about how to solve the problems and type out the solutions is effective.
Testing done: ran the programs and inspected the output.
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Co-authored-by: Gideon Glass <gglass_glass@apple.com>
Trevor Clinkenbeard