34 lines
859 B
JavaScript
34 lines
859 B
JavaScript
const { Glib, Maps, Sets, Vector, twodee } = require('../../lib');
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const parseLine = (input) =>
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Glib.fromSplit(input, ',').map(([direction, ...numchars]) => {
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return new twodee.Instruction(
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twodee.UDLR[direction],
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BigInt(numchars.join('')),
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);
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});
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module.exports = {
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'1': (input) =>
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Sets.and(
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...Glib.fromLines(input).map(
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(line) => twodee.everyStep(parseLine(line)).map((i) => i.string).set,
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),
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)
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.glib.map((i) => Vector.fromString(i).distance(twodee.ORIGIN))
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.min(),
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2: (input) =>
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Maps.add(
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...Maps.and(
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...Glib.fromLines(input).map((line) =>
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twodee
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.everyStep(parseLine(line))
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.map((pt, i) => [pt.string, i + 1])
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.toMap(),
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),
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),
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)
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.glibEntries.map(([point, distance]) => distance)
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.min(),
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};
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