Solve 2022/02

2022/day02/README.md

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+https://adventofcode.com/2022/day/2
+
+## \--- 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](https://en.wikipedia.org/wiki/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:
+
+[code]
+
+    A Y
+    B X
+    C Z
+    
+[/code]
+
+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?_
+

2022/day02/input/example0

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+A Y
+B X
+C Z

2022/day02/part1.py

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+"""
+Part1
+"""
+
+file = open("input/input", "r", encoding="utf-8")
+
+SCORES = {"ROCK": 1, "PAPER": 2, "SCISSORS": 3, "WIN": 6, "DRAW": 3, "LOSS": 0}
+
+MAPPINGS = {
+    "A": "ROCK",
+    "B": "PAPER",
+    "C": "SCISSORS",
+    "X": "ROCK",
+    "Y": "PAPER",
+    "Z": "SCISSORS",
+}
+
+BETTER_THAN = {
+    "ROCK": "PAPER",
+    "PAPER": "SCISSORS",
+    "SCISSORS": "ROCK",
+}
+
+score = 0
+
+for line in file.readlines():
+    line = line.strip()
+    opponent, ours = line.split(" ")
+
+    opponent = MAPPINGS[opponent]
+    ours = MAPPINGS[ours]
+
+    score_this_round = 0
+    score_this_round += SCORES[ours]
+
+    print("opp:", opponent, "our", ours)
+
+    if opponent == ours:
+        outcome = "DRAW"
+    elif ours == BETTER_THAN[opponent]:
+        outcome = "WIN"
+    else:
+        outcome = "LOSS"
+
+    score_this_round += SCORES[outcome]
+    score += score_this_round
+
+    print(outcome, "Score:", score_this_round)
+    print()
+
+
+print()
+print(score)

2022/day02/part2.py

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+"""
+Part2
+"""
+
+file = open("input/input", "r", encoding="utf-8")
+
+SCORES = {"ROCK": 1, "PAPER": 2, "SCISSORS": 3, "WIN": 6, "DRAW": 3, "LOSS": 0}
+
+MAPPINGS = {
+    "A": "ROCK",
+    "B": "PAPER",
+    "C": "SCISSORS",
+    "X": "LOSS",
+    "Y": "DRAW",
+    "Z": "WIN",
+}
+
+BETTER_THAN = {
+    "ROCK": "PAPER",
+    "PAPER": "SCISSORS",
+    "SCISSORS": "ROCK",
+}
+
+WORSE_THAN = {"ROCK": "SCISSORS", "PAPER": "ROCK", "SCISSORS": "PAPER"}
+
+score = 0
+
+for line in file.readlines():
+    line = line.strip()
+    opponent, outcome = line.split(" ")
+
+    opponent = MAPPINGS[opponent]
+    outcome = MAPPINGS[outcome]
+
+    score_this_round = 0
+    score_this_round += SCORES[outcome]
+
+    if outcome == "WIN":
+        ours = BETTER_THAN[opponent]
+    elif outcome == "DRAW":
+        ours = opponent
+    else:
+        ours = WORSE_THAN[opponent]
+
+    score_this_round += SCORES[ours]
+
+    print("opp:", opponent, "our", ours)
+    score += score_this_round
+
+    print(outcome, "Score:", score_this_round)
+    print()
+
+
+print()
+print(score)