题解 | #二分查找-II#

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 如果目标值存在返回下标，否则返回 -1
# @param nums int整型一维数组 
# @param target int整型 
# @return int整型
#
class Solution:
    def search(self , nums , target ):
        # write code here
        left = 0
        right = len(nums) - 1
        while left <= right:
            mid = (right + left) // 2
            if target > nums[mid]:
                left = mid + 1
            elif target < nums[mid]:
                right = mid - 1
            else:
                for index in range(mid + 1):
                    if nums[index] == target:
                        return index
        return -1