82 lines
2.2 KiB
TypeScript
82 lines
2.2 KiB
TypeScript
export const cardOrder = "A, K, Q, J, T, 9, 8, 7, 6, 5, 4, 3, 2"
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.split(", ")
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.reverse();
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export const score = (hand: string) => {
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const cards = hand.split("");
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// five of a kind
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if (hand.match(new RegExp(cards[0], "g"))?.length === cards.length) return 6;
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// four of a kind
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for (const card of cards) {
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if (hand.match(new RegExp(card, "g"))?.length === 4) return 5;
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}
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// full house
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let threeMatching = cards.some(
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(card) => hand.match(new RegExp(card, "g"))?.length === 3
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);
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let twoMatching = cards.find(
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(card) => hand.match(new RegExp(card, "g"))?.length === 2
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);
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if (threeMatching && twoMatching) return 4;
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if (threeMatching) return 3;
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let twoMatchingUnique = cards.find(
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(card) =>
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card !== twoMatching && hand.match(new RegExp(card, "g"))?.length === 2
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);
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if (twoMatchingUnique) return 2;
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if (twoMatching) return 1;
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return 0;
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};
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export const main = async (lines: string[]): Promise<number | string> => {
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const hands: { hand: string; bid: number }[] = lines
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.map((line) => {
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const [hand, bidS] = line.split(" ");
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const bid = parseInt(bidS);
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return { hand, bid };
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})
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.sort(({ hand: handOne }, { hand: handTwo }) => {
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const scoreOne = score(handOne);
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const scoreTwo = score(handTwo);
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if (scoreOne === scoreTwo) {
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let [cardOneScore, cardTwoScore] = [-1, -1];
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let i = 0;
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while (cardOneScore === cardTwoScore && i < handOne.length) {
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cardOneScore = cardOrder.indexOf(handOne[i]);
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cardTwoScore = cardOrder.indexOf(handTwo[i]);
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i++;
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}
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return cardOneScore - cardTwoScore;
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}
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return scoreOne - scoreTwo;
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});
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return hands.reduce((acc, { bid }, i) => acc + bid * (i + 1), 0);
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};
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//
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const isrun = process.argv.length > 1 && process.argv[1] === import.meta.path;
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if (isrun) {
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const file = Bun.file("./problem.txt");
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const text = await file.text();
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const lines = text.split("\n").filter((x) => x && x.length);
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console.log("=== COMPUTATION ===\n");
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const answer = await main(lines);
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console.log("\n=== /COMPUTATION ===\n");
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console.log("=== ANSWER TO P1 ===");
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console.log(answer);
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}
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