45 lines
1.0 KiB
Go
45 lines
1.0 KiB
Go
package searching
|
|
|
|
import "fmt"
|
|
|
|
/*
|
|
|
|
Find the minimum element in the rotated sorted array(ascending order).
|
|
An array [a[0], a[1], a[2], ..., a[n-1]] after 1 rotation will be [a[n-1], a[0], a[1], a[2], ..., a[n-2]]
|
|
|
|
All elements are unique
|
|
|
|
*/
|
|
func findMin(nums []int) int {
|
|
if len(nums) == 1 || nums[0] < nums[len(nums)-1]{
|
|
return nums[0]
|
|
}
|
|
|
|
front, back := 0, len(nums) -1
|
|
for front <= back {
|
|
mid := (front+back) / 2
|
|
if nums[mid] > nums[mid+1]{
|
|
return nums[mid+1]
|
|
}else if nums[mid] < nums[mid-1]{
|
|
return nums[mid]
|
|
}
|
|
|
|
if nums[mid] > nums[0]{
|
|
front = mid + 1
|
|
}else if nums[mid] < nums[0]{
|
|
back = mid - 1
|
|
}
|
|
}
|
|
return 0
|
|
}
|
|
|
|
//I will hard-code the input for now but feel free to modify
|
|
func runFindMin(){
|
|
nums1 := []int{4,5,6,7,8,0,1,2}
|
|
result1 := findMin(nums1)
|
|
fmt.Println(result1) // should print 0
|
|
|
|
nums2 := []int{1,2,3,4,5,6,7,8}
|
|
result2 := findMin(nums2)
|
|
fmt.Println(result2) // should print 1
|
|
} |