Day 13: Claw Contraption
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FAQ
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J
I think this puzzle is a bit of a missed opportunity. They could have provided inputs with no solution or with a line of solutions, so that the cost optimization becomes meaningful. As it is, you just have to carry out Cramer’s rule in extended precision rational arithmetic.
Ooh, Cramer’s rule is new to me. That will come in handy if I can remember it next year!