39 lines
889 B
JavaScript
39 lines
889 B
JavaScript
function day11(input, part2) {
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let grid = Grid.fromStr(input).mapMut((e) => ({ energy: +e, flashed: false }))
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let steps = 0
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let flashes = 0
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let totalFlashes = 0
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while (part2 ? flashes != grid.width * grid.height : steps < 100) {
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flashes = 0
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grid.forEach(function flash(e, pt, g) {
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e.energy++
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if (!e.flashed && e.energy > 9) {
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e.flashed = true
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flashes++
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g.getAllNeighborsThat(pt, (e) => !e.flashed).forEach((pt) => flash(g.get(pt), pt, g))
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}
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})
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grid.forEach((e) => {
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if (e.flashed) {
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e.energy = 0
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e.flashed = false
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}
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})
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steps++
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totalFlashes += flashes
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}
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return part2 ? steps : totalFlashes
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}
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if (typeof window == "undefined") {
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module.exports = day11
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}
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