# LeetCode — Delete and Earn

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: 6Explanation: 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: 9Explanation: 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`

Solution:

Time Complexity: O(n)

Space Complexity: O(n)

--

--

--

## More from Steven Lu

Dell Technologies — VxRail Software Engineer 👨‍💻

Love podcasts or audiobooks? Learn on the go with our new app.

## Steven Lu

Dell Technologies — VxRail Software Engineer 👨‍💻