mirror of
https://github.com/rjNemo/advent_of_code_2022
synced 2026-06-06 02:26:41 +00:00
42 lines
No EOL
2.4 KiB
Markdown
42 lines
No EOL
2.4 KiB
Markdown
# Day 2: Rock Paper Scissors
|
|
|
|
The Elves begin to set up camp on the beach. To decide whose tent gets to be closest to the snack storage, a giant Rock
|
|
Paper Scissors tournament is already in progress.
|
|
|
|
Rock Paper Scissors is a game between two players. Each game contains many rounds; in each round, the players each
|
|
simultaneously choose one of Rock, Paper, or Scissors using a hand shape. Then, a winner for that round is selected:
|
|
Rock defeats Scissors, Scissors defeats Paper, and Paper defeats Rock. If both players choose the same shape, the round
|
|
instead ends in a draw.
|
|
|
|
Appreciative of your help yesterday, one Elf gives you an **encrypted strategy guide** (your puzzle input) that they say
|
|
will be sure to help you win. "The first column is what your opponent is going to play: `A` for Rock, `B` for Paper,
|
|
and `C` for Scissors. The second column--" Suddenly, the Elf is called away to help with someone's tent.
|
|
|
|
The second column, you reason, must be what you should play in response: X for Rock, Y for Paper, and Z for Scissors.
|
|
Winning every time would be suspicious, so the responses must have been carefully chosen.
|
|
|
|
The winner of the whole tournament is the player with the highest score. Your **total score** is the sum of your scores for
|
|
each round. The score for a single round is the score for the **shape you selected** (1 for Rock, 2 for Paper, and 3 for
|
|
Scissors) plus the score for the **outcome of the round** (0 if you lost, 3 if the round was a draw, and 6 if you won).
|
|
|
|
Since you can't be sure if the Elf is trying to help you or trick you, you should calculate the score you would get if
|
|
you were to follow the strategy guide.
|
|
|
|
For example, suppose you were given the following strategy guide:
|
|
|
|
```
|
|
A Y
|
|
B X
|
|
C Z
|
|
```
|
|
|
|
This strategy guide predicts and recommends the following:
|
|
|
|
- In the first round, your opponent will choose Rock (A), and you should choose Paper (Y). This ends in a win for you
|
|
with a score of **8** (2 because you chose Paper + 6 because you won).
|
|
- In the second round, your opponent will choose Paper (B), and you should choose Rock (X). This ends in a loss for you
|
|
with a score of **1** (1 + 0).
|
|
- The third round is a draw with both players choosing Scissors, giving you a score of 3 + 3 = **6**.
|
|
In this example, if you were to follow the strategy guide, you would get a total score of **15** (8 + 1 + 6).
|
|
|
|
**What would your total score be if everything goes exactly according to your strategy guide?** |