16 lines
440 B
JavaScript
16 lines
440 B
JavaScript
function day15(input, part2) {
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let g = Grid.fromStr(input).num()
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if (part2) {
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g = new Grid(g.width * 5, g.height * 5).mapMut((e, pt) => ((g.get(new Pt(pt.x % g.width, pt.y % g.height)) + (pt.x / g.width | 0) + (pt.y / g.height | 0) - 1) % 9) + 1)
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}
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g.graphify()
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let start = g.get(new Pt(0, 0))
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let end = g.get(new Pt(g.width - 1, g.height - 1))
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start.dijkstraTo(end)
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return end.searchData.dist
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}
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