You can watch authors talk about how he prepares challenges and other challenges he had with AoC :D https://www.youtube.com/watch?v=gibVyxpi-qA&feature=emb_titl

You can watch authors talk about how he prepares challenges and other challenges he had with AoC :D https://www.youtube.com/watch?v=gibVyxpi-qA&feature=emb_title https://www.youtube.com/watch?v=gibVyxpi-qA&feature=emb_titl...