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Maximum Product Subarray

Solution Approach
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MediumarrayExpected: O(n) time, O(1) space

Problem

Given an integer array, find the contiguous subarray that has the largest product.

Example 1:

Input: nums = [2, 3, -2, 4]
Output: 6
Explanation: [2, 3] has the largest product = 6.

Example 2:

Input: nums = [-2, 0, -1]
Output: 0
Explanation: The maximum product subarray is [0].
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