A lot of people keep their work on these on GitHub, a quick search should turn up solutions for at least the first few sets in any language you care to name. T

A lot of people keep their work on these on GitHub, a quick search should turn up solutions for at least the first few sets in any language you care to name. That said, if you want to get value out of these, don't look at someone else's solutions until you've worked through them yourself. They're challenging, but very doable and very rewarding.