Package g3401_3500.s3410_maximize_subarray_sum_after_removing_all_occurrences_of_one_element

Class Solution

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public final class Solution

    3410 - Maximize Subarray Sum After Removing All Occurrences of One Element.

    Hard

    You are given an integer array nums.

    You can do the following operation on the array at most once:

    • Choose any integer x such that nums remains non-empty on removing all occurrences of x.

    • Remove all occurrences of x from the array.

    Return the maximum subarray sum across all possible resulting arrays.

    A subarray is a contiguous non-empty sequence of elements within an array.

    Example 1:

    Input: nums = -3,2,-2,-1,3,-2,3

    Output: 7

    Explanation:

    We can have the following arrays after at most one operation:

    • The original array is <code>nums = -3, 2, -2, -1, <ins> **3, -2, 3** </ins></code>. The maximum subarray sum is 3 + (-2) + 3 = 4.

    • Deleting all occurences of x = -3 results in <code>nums = 2, -2, -1, **<ins>3, -2, 3</ins>** </code>. The maximum subarray sum is 3 + (-2) + 3 = 4.

    • Deleting all occurences of x = -2 results in <code>nums = -3, **<ins>2, -1, 3, 3</ins>** </code>. The maximum subarray sum is 2 + (-1) + 3 + 3 = 7.

    • Deleting all occurences of x = -1 results in <code>nums = -3, 2, -2, **<ins>3, -2, 3</ins>** </code>. The maximum subarray sum is 3 + (-2) + 3 = 4.

    • Deleting all occurences of x = 3 results in <code>nums = -3, <ins> **2** </ins>, -2, -1, -2</code>. The maximum subarray sum is 2.

    The output is max(4, 4, 7, 4, 2) = 7.

    Example 2:

    Input: nums = 1,2,3,4

    Output: 10

    Explanation:

    It is optimal to not perform any operations.

    Constraints:

    • <code>1 <= nums.length <= 10<sup>5</sup></code>

    • <code>-10<sup>6</sup><= numsi<= 10<sup>6</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Long maxSubarraySum(IntArray nums)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait