43 lines
842 B
JavaScript
43 lines
842 B
JavaScript
import fs from "fs-extra";
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import fp from "lodash/fp.js";
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import _ from "lodash";
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import * as p1 from "./part1.mjs";
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function completionString(line) {
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const stack = [];
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for (const c of line) {
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if (p1.closing[c]) {
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stack.unshift(p1.closing[c]);
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} else if (c !== stack.shift()) {
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return;
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}
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}
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return stack;
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}
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export function linesScore(lines) {
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lines = lines.map(completionString).filter((x) => x);
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const points = {
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")": 1,
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"]": 2,
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"}": 3,
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">": 4,
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};
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const lineScore = (line) => line.reduce((a, b) => 5 * a + points[b], 0);
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return lines.map(lineScore);
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}
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export function solution(lines) {
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const scores = linesScore(lines);
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scores.sort((a, b) => (a < b ? -1 : 1));
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return scores[(scores.length - 1) / 2];
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}
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