Module day02

Rock Paper Scissors

With so few combinations it’s possible to precompute the values for each scenario by hand then quickly look them up for each game.

Functions

• parse
  Map each line from one of the 9 possible combinations (“A”, “B” or “C” followed by “X”, “Y” or “Z”) to between 0 and 8 inclusive.
• part1
  Map each index to a score using a small precomputed lookup table.
• part2
  Map each index to a (different) score using a second small precomputed lookup table.