36 lines
936 B
JavaScript
36 lines
936 B
JavaScript
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const { Glib } = require('../../lib');
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module.exports = {
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'1': (input) =>
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Glib.fromLines(input)
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.map((boxId) => new Set(boxId.characterFrequencies.values()))
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.reduce(
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([two, three], counts) => [
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two + (counts.has(2n) ? 1n : 0n),
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three + (counts.has(3n) ? 1n : 0n),
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],
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[0n, 0n],
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)
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.glib.product(),
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'2': (input) => {
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const boxIds = Glib.fromLines(input).map(
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(boxId) =>
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Glib.fromSequence(0, boxId.length - 1).map((i) =>
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boxId.splice(Number(i), 1),
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).array,
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).array;
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for (let i = 0; i < boxIds.length; i++) {
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const left = boxIds[i];
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for (let j = i + 1; j < boxIds.length; j++) {
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const right = boxIds[j];
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for (let k = 0; k < left.length; k++) {
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if (left[k] === right[k]) {
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return left[k];
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}
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}
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}
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}
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throw new Error('no solution');
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},
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};
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