11_1
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import { readFileSync } from "fs";
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const input = readFileSync("monkeys.txt", "utf-8");
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function resolveOperation(num, oper) {
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oper = oper.split(" = ")[1];
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if(oper.includes("+")) {
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const number = oper.split(" + ")[1];
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num += number.includes("old") ? num : parseInt(number);
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} else {
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const number = oper.split(" * ")[1];
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num *= number.includes("old") ? num : parseInt(number);
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}
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return num;
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}
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const monkeys = [];
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let monkey = {};
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input.split('\n').forEach(line => {
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if(line.startsWith("Monkey ")) monkey.number = parseInt(line.split(" ")[1][0]);
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if(line.startsWith(" Starting items: ")) monkey.items = line.split(": ")[1].split(', ').slice().map(x => parseInt(x));
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if(line.startsWith(" Operation: ")) monkey.operation = line.split(": ")[1];
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if(line.startsWith(" Test: ")) monkey.divisibleBy = parseInt(line.split(" divisible by ")[1]);
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if(line.startsWith(" If true: ")) monkey.ifTrue = parseInt(line.split(" throw to monkey ")[1]);
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if(line.startsWith(" If false: ")) {
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monkey.ifFalse = parseInt(line.split(" throw to monkey ")[1]);
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monkey.itemsInspected = 0;
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monkeys.push(monkey);
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monkey = {};
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}
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});
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for(let i = 0; i < 20; i++) {
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monkeys.forEach(m => {
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while(m.items.length > 0) {
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m.itemsInspected++;
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let worry = resolveOperation(m.items[0], m.operation);
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worry = Math.floor(worry / 3);
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m.items.splice(0, 1);
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if(worry % m.divisibleBy === 0) monkeys[m.ifTrue].items.push(worry);
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else monkeys[m.ifFalse].items.push(worry);
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}
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});
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}
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const findMaxArray = monkeys.map(m => m.itemsInspected).sort((a, b) => a - b);
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const monkeyBusiness = findMaxArray.pop() * findMaxArray.pop();
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console.log(monkeyBusiness)
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Monkey 0:
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Starting items: 89, 84, 88, 78, 70
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Operation: new = old * 5
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Test: divisible by 7
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If true: throw to monkey 6
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If false: throw to monkey 7
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Monkey 1:
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Starting items: 76, 62, 61, 54, 69, 60, 85
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Operation: new = old + 1
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Test: divisible by 17
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If true: throw to monkey 0
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If false: throw to monkey 6
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Monkey 2:
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Starting items: 83, 89, 53
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Operation: new = old + 8
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Test: divisible by 11
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If true: throw to monkey 5
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If false: throw to monkey 3
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Monkey 3:
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Starting items: 95, 94, 85, 57
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Operation: new = old + 4
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Test: divisible by 13
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If true: throw to monkey 0
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If false: throw to monkey 1
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Monkey 4:
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Starting items: 82, 98
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Operation: new = old + 7
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Test: divisible by 19
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If true: throw to monkey 5
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If false: throw to monkey 2
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Monkey 5:
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Starting items: 69
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Operation: new = old + 2
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Test: divisible by 2
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If true: throw to monkey 1
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If false: throw to monkey 3
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Monkey 6:
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Starting items: 82, 70, 58, 87, 59, 99, 92, 65
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Operation: new = old * 11
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Test: divisible by 5
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If true: throw to monkey 7
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If false: throw to monkey 4
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Monkey 7:
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Starting items: 91, 53, 96, 98, 68, 82
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Operation: new = old * old
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Test: divisible by 3
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If true: throw to monkey 4
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If false: throw to monkey 2
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