2020's day 20 was really tricky - that, and day 23 were the only two days I didn't manage to solve two parts on. I managed to get part one for day 20, but neith

2020's day 20 was really tricky - that, and day 23 were the only two days I didn't manage to solve two parts on. I managed to get part one for day 20, but neither parts for day 23. It was good fun trying both, though!