Advent of Code 2018 https://adventofcode.com/2018 Advent of Code 2018 in Crystal If you execute "crystal spec", put secret_answer in the same folder as "n_spec.cr". This is because we will not disclose the answer. Environment Crystal: 0.27.0 Ubuntu: 18.10 Contributors Kentaro Tanaka(KTanaka101) - creator and maintainer