You are given an integer array `nums`. You want to maximize the number of points you get by performing the following operation any number of times:

- Pick any `nums[i]` and delete it to earn `nums[i]` points. Afterwards, you must delete every element equal to `nums[i] - 1` and every element equal to `nums[i] + 1`.

Return the maximum number of points you can earn by applying the above operation some number of times.

Example 1:

    Input: nums = [3,4,2]
    Output: 6
    Explanation: You can perform the following operations:
    - Delete 4 to earn 4 points. Consequently, 3 is also deleted. nums = [2].
    - Delete 2 to earn 2 points. nums = [].
    You earn a total of 6 points.

Example 2:

    Input: nums = [2,2,3,3,3,4]
    Output: 9
    Explanation: You can perform the following operations:
    - Delete a 3 to earn 3 points. All 2's and 4's are also deleted. nums = [3,3].
    - Delete a 3 again to earn 3 points. nums = [3].
    - Delete a 3 once more to earn 3 points. nums = [].
    You earn a total of 9 points.

Constraints:

- `1 <= nums.length <= 2 * 104`
- `1 <= nums[i] <= 104`