18 lines
438 B
Go
18 lines
438 B
Go
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package main
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func wiggleMaxLength(nums []int) int {
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// Current's value only matters in terms of negative / 0 / positive.
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// The numerical value doesn't get used and therefore can be messed with.
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current, count := 0, len(nums)
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for i := 0; i < len(nums)-1; i++ {
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new := nums[i+1] - nums[i]
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if (current > 0 && new > 0) || (current < 0 && new < 0) || new == 0 {
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count--
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}
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if new != 0 {
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current = new
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}
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}
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return count
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}
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