Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.
\n\nYou must write an algorithm with O(log n) runtime complexity.
\n
Example 1:
\n\n\nInput: nums = [1,3,5,6], target = 5\nOutput: 2\n\n\n
Example 2:
\n\n\nInput: nums = [1,3,5,6], target = 2\nOutput: 1\n\n\n
Example 3:
\n\n\nInput: nums = [1,3,5,6], target = 7\nOutput: 4\n\n\n
\n
Constraints:
\n\n1 <= nums.length <= 104-104 <= nums[i] <= 104nums contains distinct values sorted in ascending order.-104 <= target <= 104给定一个排序数组和一个目标值，在数组中找到目标值，并返回其索引。如果目标值不存在于数组中，返回它将会被按顺序插入的位置。
\n\n请必须使用时间复杂度为 O(log n) 的算法。
\n\n
示例 1:
\n\n\n输入: nums = [1,3,5,6], target = 5\n输出: 2\n\n\n
示例 2:
\n\n\n输入: nums = [1,3,5,6], target = 2\n输出: 1\n\n\n
示例 3:
\n\n\n输入: nums = [1,3,5,6], target = 7\n输出: 4\n\n\n
\n\n
提示:
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