43 lines
972 B
JavaScript
43 lines
972 B
JavaScript
import fs from "fs-extra";
|
|
import fp from "lodash/fp.js";
|
|
import _ from "lodash";
|
|
|
|
import * as p1 from "./part1.mjs";
|
|
|
|
const cartesianProduct = (...rest) =>
|
|
rest.reduce(
|
|
(a, b) => a.flatMap((x) => b.map((y) => x.concat([y]))),
|
|
[[]]
|
|
);
|
|
|
|
const dimensions = cartesianProduct(
|
|
_.range(1, 4),
|
|
_.range(1, 4),
|
|
_.range(1, 4)
|
|
).map(fp.sum);
|
|
|
|
function resolveGame(p1, p2, s1, s2, f) {
|
|
let wins = 0;
|
|
let loses = 0;
|
|
|
|
dimensions.forEach((points) => {
|
|
const newPosition = (p1 + points) % 10;
|
|
const newScore = newPosition + 1 + s1;
|
|
if (newScore >= 21) {
|
|
wins++;
|
|
return;
|
|
}
|
|
const next = f(p2, newPosition, s2, newScore, f);
|
|
wins += next[1];
|
|
loses += next[0];
|
|
});
|
|
|
|
return [wins, loses];
|
|
}
|
|
|
|
export function solution(positions) {
|
|
const res = _.memoize(resolveGame, (...args) => args.join("-"));
|
|
|
|
return Math.max(...res(...positions, 0, 0, res));
|
|
}
|