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@@ -0,0 +1,147 @@
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+package main
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+
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+import (
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+ "fmt"
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+)
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+
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+func main() {
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+ var nums []int
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+ var target int
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+
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+ nums = []int{1}
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+ target = 1
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1}
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+ target = 0
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1, 2}
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+ target = 1
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1, 2}
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+ target = 3
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1, 2, 4}
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+ target = 0
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1, 2, 4}
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+ target = 1
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1, 2, 4}
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+ target = 2
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1, 2, 4}
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+ target = 3
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1, 2, 4}
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+ target = 4
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{1, 2, 4}
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+ target = 5
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+ fmt.Println(search(nums, target))
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+
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+ fmt.Println("----------------------------")
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+
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+ nums = []int{4, 1, 2}
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+ target = 0
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 1, 2}
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+ target = 1
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 1, 2}
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+ target = 2
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 1, 2}
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+ target = 3
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 1, 2}
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+ target = 4
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 1, 2}
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+ target = 5
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+ fmt.Println(search(nums, target))
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+
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+ fmt.Println("----------------------------")
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+ // 4, -1, 0, 6, 3, 1, 5
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+ nums = []int{4, 5, 6, 7, 0, 1, 2}
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+ target = 0
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 5, 6, 7, 0, 1, 2}
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+ target = 3
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 5, 6, 7, 0, 1, 2}
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+ target = 4
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 5, 6, 7, 0, 1, 2}
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+ target = 2
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 5, 6, 7, 0, 1, 2}
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+ target = 7
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 5, 6, 7, 0, 1, 2}
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+ target = 5
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+ fmt.Println(search(nums, target))
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+
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+ nums = []int{4, 5, 6, 7, 0, 1, 2}
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+ target = 1
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+ fmt.Println(search(nums, target))
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+
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+ fmt.Println("----------------------------")
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+
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+ nums = []int{8, 1, 2, 3, 4, 5, 6, 7}
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+ target = 6
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+ fmt.Println(search(nums, target))
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+}
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+
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+func search(nums []int, target int) int {
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+ var min, mid, max int = 0, 0, len(nums) - 1
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+ var index = -1
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+ for min <= max {
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+ mid = (min + max) / 2
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+ //fmt.Println(nums[min], nums[max], nums[mid])
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+ if nums[mid] == target {
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+ return mid
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+ }
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+ if nums[min] == target {
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+ return min
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+ }
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+ if nums[max] == target {
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+ return max
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+ }
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+ if nums[min] < nums[mid] && nums[mid] < target {
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+ min = mid + 1
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+ } else if nums[min] < nums[mid] && nums[mid] > target && nums[min] < target {
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+ max = mid - 1
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+ } else if nums[min] > nums[mid] && nums[mid] < target && nums[min] < target {
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+ max = mid - 1
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+ } else if nums[min] < nums[mid] && nums[mid] > target && nums[min] > target {
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+ min = mid + 1
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+ } else if nums[min] > nums[mid] && nums[mid] < target && nums[min] > target {
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+ min = mid + 1
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+ } else if nums[min] > nums[mid] && nums[mid] > target {
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+ //nums[min]>nums[mid] && nums[mid] > target
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+ max = mid - 1
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+ } else {
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+ break
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+ }
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+ }
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+ return index
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+}
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