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// @Title: 在排序数组中查找数字 I (在排序数组中查找数字  LCOF)
// @Author: 15816537946@163.com
// @Date: 2022-02-03 11:38:36
// @Runtime: 4 ms
// @Memory: 3.8 MB
func search(nums []int, target int) int {
    if len(nums) == 0 {
        return 0 
    }
    if len(nums) ==1 && target == nums[0] {
        return 1
    }

    lo,hi := 0, len(nums)-1
    index :=-1

    for lo <= hi {
        i := (lo+hi) >> 1
        if nums[i] == target {
            index = i
            break
        }  else if nums[i] > target {
            hi = i-1
        } else {
            lo = i+1
        }
    }
    fmt.Println(index)
    
    if index == -1 {
        return 0
    }

    cnt :=0
    for i:=index;i>=0 && nums[i]== target;i-- {
        cnt++
    }
    for i:= index;i<len(nums) && nums[i]== target;i++ {
        cnt++
    }
    return cnt-1
}