const fs = require(\"node:fs\");
const input = fs.readFileSync(\"day3-input.txt\", \"utf-8\");

console.log(
  input
    .split(\"mul(\")
    .map((x) => x.split(\")\")[0])
    .filter(
      (x) =>
        x
          .split(\",\")
          .map((a) => Number(a))
          .filter((a) => isNaN(a)).length === 0,
    )
    .map((x) => x.split(\",\").map((y) => parseInt(y)))
    .reduce((acc, [a, b]) => (acc += a * b), 0),
);