36 lines
715 B
Go
36 lines
715 B
Go
package main
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func nodesBetweenCriticalPoints(head *ListNode) []int {
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OUT_OF_BOUNDS_DISTANCE := 1000000
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isCritical := func(x, y, z int) bool {
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return (y < x && y < z) || (y > x && y > z)
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}
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minDistance := OUT_OF_BOUNDS_DISTANCE
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previous, node := head, head.Next
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previousIdx, firstIdx := 0, 0
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index := 1
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for node.Next != nil {
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if isCritical(previous.Val, node.Val, node.Next.Val) {
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if previousIdx == 0 {
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firstIdx = index
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} else {
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minDistance = min(minDistance, index-previousIdx)
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}
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previousIdx = index
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}
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index++
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previous, node = node, node.Next
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}
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if minDistance != OUT_OF_BOUNDS_DISTANCE {
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return []int{minDistance, previousIdx - firstIdx}
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}
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return []int{-1, -1}
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}
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