You are given a 0-indexed integer array `nums` and a target element `target`.

A target index is an index `i` such that `nums[i] == target`.

Return a list of the target indices of `nums` after sorting `nums` in non-decreasing order. If there are no target indices, return an empty list. The returned list must be sorted in increasing order.

Example 1:

    Input: nums = [1,2,5,2,3], target = 2
    Output: [1,2]
    Explanation: After sorting, nums is [1,2,2,3,5].
    The indices where nums[i] == 2 are 1 and 2.

Example 2:

    Input: nums = [1,2,5,2,3], target = 3
    Output: [3]
    Explanation: After sorting, nums is [1,2,2,3,5].
    The index where nums[i] == 3 is 3.

Example 3:

    Input: nums = [1,2,5,2,3], target = 5
    Output: [4]
    Explanation: After sorting, nums is [1,2,2,3,5].
    The index where nums[i] == 5 is 4.

Constraints:

- `1 <= nums.length <= 100`
- `1 <= nums[i], target <= 100`