19 lines
510 B
TypeScript
19 lines
510 B
TypeScript
import { sumArray } from '../../utils/array';
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export function solveFirst(input: string): number {
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return sumArray(findAndEvalMul(input));
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}
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function findAndEvalMul(line?: string | null | undefined) {
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return Array.from(
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(line || '').matchAll(/mul\((\d{1,3}),(\d{1,3})\)/gm),
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(m) => Number(m[1]) * Number(m[2])
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);
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}
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export function solveSecond(input: string): number {
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const splits = input.split('do()').map((l) => l.split("don't()")[0]);
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return sumArray(splits.flatMap(findAndEvalMul));
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}
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