37 lines
614 B
Go
37 lines
614 B
Go
package main
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import "time"
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type pqItem struct {
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Stop string
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Cost time.Time
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index int
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}
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type priorityQueue []*pqItem
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func (pq priorityQueue) Len() int { return len(pq) }
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func (pq priorityQueue) Less(i, j int) bool { return pq[i].Cost.Before(pq[j].Cost) }
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func (pq priorityQueue) Swap(i, j int) {
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pq[i], pq[j] = pq[j], pq[i]
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pq[i].index = i
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pq[j].index = j
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}
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func (pq *priorityQueue) Push(x any) {
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item := x.(*pqItem)
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item.index = len(*pq)
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*pq = append(*pq, item)
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}
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func (pq *priorityQueue) Pop() any {
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old := *pq
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n := len(old)
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item := old[n-1]
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item.index = -1
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*pq = old[:n-1]
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return item
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}
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