51 lines
1.3 KiB
JavaScript
51 lines
1.3 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 main = async () => {
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const input = (await fs.readFile("./input.txt", 'utf8')).split("\n\n");
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const getMonkey = (str) => {
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const rows = str.split("\n").slice(1).map(r => r.split(": ")[1]);
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const testItem = (item) => !(item % rows[2].split(" ")[2]);
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const items = rows[0].split(", ").map(x => parseFloat(x));
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const inspectItem = (old) => Math.floor(eval(`const old = ${old}; const item${rows[1]}; itemnew;`)/3);
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const trueTarget = rows[3][rows[3].length - 1];
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const falseTarget = rows[4][rows[4].length - 1];
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let inspectCount = 0;
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const takeTurn = () => {
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while(items.length) {
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inspectCount++;
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const item = items.shift();
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const inspectedItem = inspectItem(item);
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monkeyData[testItem(inspectedItem) ? trueTarget : falseTarget].addItem(inspectedItem);
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}
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}
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const addItem = (item) => items.push(item);
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return {
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takeTurn,
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addItem,
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getCount: () => inspectCount
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};
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};
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const monkeyData = input.map(getMonkey);
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for (let i = 0; i < 20; ++i) {
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monkeyData.forEach(m => m.takeTurn());
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}
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const counts = monkeyData.map(m => m.getCount()).sort((a, b) => b - a);
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console.log(counts[0] * counts[1]);
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}
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main();
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