删除有序数组中的重复项II
func removeDuplicates(nums []int) int {
length := len(nums)
if length <= 2 {
return length
}
slow,fast := 2,2
for fast <length {
if nums[slow-2]!=nums[fast]{
nums[slow]=nums[fast]
slow++
}
fast++
}
return slow
}
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