106 lines
2.7 KiB
JavaScript
106 lines
2.7 KiB
JavaScript
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const fs = require('fs/promises');
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const sum = (arr) => arr.reduce((total, num) => total+num, 0);
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const arrayOfLength = n => Array.from(Array(n).keys()).map(() => {});
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//minus
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const keypress = async () => {
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process.stdin.setRawMode(true)
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return new Promise(resolve => process.stdin.once('data', data => {
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const byteArray = [...data]
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if (byteArray.length > 0 && byteArray[0] === 3) {
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console.log('^C')
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process.exit(1)
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}
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process.stdin.setRawMode(false)
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resolve()
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}))
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}
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const coords = ([x, y, z]) => `${x},${y},${z}`;
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const createPlan = ([id, orO, crO, obrO, obrC, grO, grObs]) => {
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return {
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id,
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botCosts: {
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ore: {ore: orO},
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clay: {ore: crO},
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obs: {
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ore: obrO,
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clay: obrC
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},
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geo: {
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ore: grO,
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obs: grObs
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}
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},
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maxBotNeed: {
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ore: Math.max(orO, crO, obrO, grO),
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clay: obrC,
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obs: grObs,
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geo: Infinity
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}
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}
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};
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let exhaustedPossibilities = 0;
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const runPlan = (
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plan,
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buildNext,
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bots = {ore: 1, clay: 0, obs: 0, geo: 0},
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resources = {ore: 0, clay: 0, obs: 0, geo: 0},
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time=24
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) => {
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if(time < 1) {
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exhaustedPossibilities++;
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if(exhaustedPossibilities % 1000000 === 0) {
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console.log("Tried ", exhaustedPossibilities, " possible outcomes");
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}
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return resources.geo;
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}
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const {maxBotNeed, botCosts} = plan;
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const nextResources = Object.entries(resources).reduce((next, [type, count]) => {
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next[type] = count + bots[type];
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return next;
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}, {});
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let nextBots = bots;
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const canBuild = buildNext && Object.entries(botCosts[buildNext]).every(([type, needed]) => resources[type] >= needed);
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if(canBuild) {
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nextBots = {...bots, [buildNext]: bots[buildNext] + 1};
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for(const type in botCosts[buildNext]) {
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nextResources[type] -= botCosts[buildNext][type];
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}
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buildNext = undefined;
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}
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if(buildNext) {
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return runPlan(plan, buildNext, nextBots, nextResources, time -1);
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}
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const outcomes = Object.entries(botCosts).filter(([k]) => k !== "id").map(([type, costs]) => {
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for(const key in costs) {
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if(!nextBots[key]) {
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return 0;
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}
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}
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if(nextBots[type] >= maxBotNeed[type]) {
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return 0;
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}
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return runPlan(plan, type, nextBots, nextResources, time - 1);
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});
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return Math.max(...outcomes);
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};
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const main = async () => {
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const input = (await fs.readFile("./input.txt", 'utf8')).slice(0, -1).split("\n");
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const plans = input.map(p => createPlan(p.match(/\d+/g).map(x => parseInt(x))));
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const results = plans.map(plan => plan.id * Math.max(runPlan(plan, "ore"), runPlan(plan, "clay")));
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console.log("Answer: ", sum(results));
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}
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main();
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