61 lines
1.1 KiB
JavaScript
61 lines
1.1 KiB
JavaScript
import * as R from "remeda";
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import fs from "fs-extra";
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import path from "path";
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export const sampleInput = `A Y
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B X
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C Z`;
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export const puzzleInput = fs.readFileSync(
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path.join(path.dirname(import.meta.url), "input").replace("file:", ""),
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"utf8"
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);
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const playMap = {
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X: "A", // rock
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Y: "B", // paper
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Z: "C", // scissors
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};
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export const parseInput = R.createPipe(
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(text) => text.split("\n"),
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R.filter(R.identity), // remove last line
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R.map((entry) => entry.split(" "))
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);
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export const movePositions = ["A", "B", "C"];
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const playScore = {
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A: 1,
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B: 2,
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C: 3,
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};
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const draw = 3;
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const lost = 0;
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const win = 6;
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const outcome = (opponent, me) => {
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if (opponent === me) return draw;
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if (opponent === "A") {
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return me === "C" ? lost : win;
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}
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if (opponent === "B") {
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return me === "A" ? lost : win;
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}
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return me === "B" ? lost : win;
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};
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export const mapScores = ([opponent, me]) => [
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outcome(opponent, me),
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playScore[me],
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];
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export const solutionPart1 = R.createPipe(
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parseInput,
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R.map(([a, b]) => [a, playMap[b]]),
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R.map(mapScores),
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R.map(R.sumBy(R.identity)),
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R.sumBy(R.identity)
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);
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