Day 2: Rock Paper Scissors

• Posted 2022-12-17

The second AoC challenge provides a plain-text file containing a series of plays of Rock, Paper, Scissors, represented by the letters A, B and C respectively for the player and X, Y and Z respectively for the opponent. For example:

B Z
B X
C Y
B Y
B Y

It then goes on to detail a scoring system, in which a score of 1, 2 and 3 is allocated for using Rock, Paper and Scissors respectively. A further score is added based on the outcome of the round: 0 for a loss, 3 for a draw, and 6 for a win.

The actual challenge is, given a record of many rounds of Rock, Paper, Scissors in the format shown above, to calculate the total score that was achieved.

Data wrangling

First, we read in the input using 0:.

d:0:"02.input"
5#d

Output:

::
("B Z" "B X" "C Y" "B Y" "B Y")

TODO

Solution

TODO