mediumArraysPattern: max-subarray-sum
Alternating Subarray Sum Solution
Problem Statement
Given an array of integers `asteroidValues` where positive values represent valuable resources and negative values represent hazardous asteroids, find the maximum sum of a subarray that alternates between positive and negative integers. The subarray must start with a positive integer and alternate between positive and negative integers.
Examples
Example 1:
Input:[3, -2, 5, -1, 4, -3]
Output:11
Explanation: The subarray [3, -2, 5, -1, 4, -3] has the maximum alternating sum starting with a valuable asteroid.
Example 2:
Input:[1, -5, 3, -2, 4, -1]
Output:7
Explanation: The subarray [1, -5, 3, -2, 4, -1] does not have the maximum alternating sum, the correct subarray is [3, -2, 4, -1].
Time: O(N) Space: O(1)
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