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25 lines
580 B
JavaScript
25 lines
580 B
JavaScript
const findShortestPath = async (g, s, e) => {
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const { default: PQ } = await import('https://esm.sh/js-priority-queue')
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const q = new PQ({ comparator: (a, b) => a.d - b.d })
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const m = { [s]: 0 }
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q.queue({ n: s, d: 0 })
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while (q.length) {
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const { n, d } = q.dequeue()
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if (n === e) return d
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if (d > (m[n] ?? 1 / 0)) continue
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const adj = g[n] || {}
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for (const k in adj) {
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const v = d + adj[k]
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if (v < (m[k] ?? 1 / 0)) {
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m[k] = v
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q.queue({ n: k, d: v })
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}
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}
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}
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return 1 / 0
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}
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export default findShortestPath; |