54 lines
No EOL
1.5 KiB
TypeScript
54 lines
No EOL
1.5 KiB
TypeScript
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import { solvables } from "../main.ts";
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import type { Solvable } from "../solvable.ts";
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import { readInput } from "../utils.ts";
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class DayThree implements Solvable {
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input = readInput('03')
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private multiplyInstruction(inst: string) {
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return inst
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.slice(4, -1)
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.split(',')
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.map(arr => Number.parseInt(arr))
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}
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public part1(): Solvable {
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const re = /mul\([0-9]+,[0-9]+\)/g
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// get all matches and parse them to int[]
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const result = this.input.matchAll(new RegExp(re))
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.map(match => this.multiplyInstruction(match[0]))
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.map(([left, right]) => left * right)
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.reduce((prev, curr) => prev + curr)
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console.log(result)
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return this
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}
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public part2(): Solvable {
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const re = /(mul\([0-9]+,[0-9]+\)|do\(\)|don\'t\(\))/g
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// get all matches and parse them to int[]
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const instructions = this.input.matchAll(new RegExp(re)).map(match => match[0])
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let active = true
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let result = 0
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for (const inst of instructions) {
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if (inst === 'do()') {
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active = true;
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continue
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}
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if (inst === 'don\'t()') {
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active = false;
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continue
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}
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if (active) {
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const [left, right] = this.multiplyInstruction(inst)
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result += left * right
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}
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}
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console.log(result)
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return this
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}
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}
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solvables.push(new DayThree()) |