AoC-23/Day7/Part2.js
2023-12-09 18:56:39 +01:00

65 lines
1.5 KiB
JavaScript

import { readFileSync } from "fs";
const t0 = performance.now();
const cardPattern = [
[1, 1, 1, 1, 1],
[2, 1, 1, 1],
[2, 2, 1],
[3, 1, 1],
[3, 2],
[4, 1],
[5],
];
const cards = ["A", "K", "Q", "T", "9", "8", "7", "6", "5", "4", "3", "2", "J"];
const JOKER_INDEX = "12";
const input = readFileSync("input.txt")
.toString()
.split("\n")
.filter((e) => e.length > 0);
const plays = input
.map((p) => {
const [draw, bidding] = p.split(" ");
const count = draw
.split("")
.map((e) => cards.indexOf(e))
.sort((a, b) => b - a)
.reduce((a, i) => {
const t = a;
t[i] = (t[i] ?? 0) + 1;
return t;
}, {});
const joker = count[JOKER_INDEX];
const jCheck = joker && joker !== 5;
if (jCheck) count[JOKER_INDEX] = 0;
const pattern = Object.keys(count)
.map((e) => count[e])
.filter((e) => e > 0)
.sort((a, b) => b - a);
if (jCheck) pattern[0] += joker;
const hand = cardPattern.findIndex((a) =>
a.every((b, c) => b === pattern[c])
);
return { hand, draw, bidding: parseInt(bidding) };
})
.sort((a, b) => {
const type = a.hand - b.hand;
if (type !== 0) return type;
for (const [i, c] of a.draw.split("").entries()) {
const p1 = cards.indexOf(c);
const p2 = cards.indexOf(b.draw[i]);
if (p1 === p2) continue;
return p1 > p2 ? -1 : 1;
}
return 0;
})
.map((e, i) => e.bidding * (i + 1))
.reduce((a, i) => a + i);
console.log(plays);
const t1 = performance.now();
console.log(`Runtime: ${t1 - t0}ms`);