I found this page on one of the LFE books that explains in brief the original problem and constraints https://lfe.io/books/sicp/fm/preface-3/erlang.html https:

I found this page on one of the LFE books that explains in brief the original problem and constraints https://lfe.io/books/sicp/fm/preface-3/erlang.html https://lfe.io/books/sicp/fm/preface-3/erlang.html