` ````
```

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Given an array `nums`

of integers, you can perform operations on the array.

In each operation, you pick any `nums[i]`

and delete it to earn `nums[i]`

points. After, you must delete **every** element equal to `nums[i] - 1`

or `nums[i] + 1`

.

You start with 0 points. Return the maximum number of points you can earn by applying such operations.

**Example 1:**

Input:nums = [3, 4, 2]Output:6Explanation:Delete 4 to earn 4 points, consequently 3 is also deleted. Then, delete 2 to earn 2 points. 6 total points are earned.

**Example 2:**

Input:nums = [2, 2, 3, 3, 3, 4]Output:9Explanation:Delete 3 to earn 3 points, deleting both 2's and the 4. Then, delete 3 again to earn 3 points, and 3 again to earn 3 points. 9 total points are earned.

**Note:**

`nums`

is at most `20000`

.`nums[i]`

is an integer in the range `[1, 10000]`

.
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