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39 lines
1.3 KiB
HTML
39 lines
1.3 KiB
HTML
<p>Given an array of integers <code>nums</code>, find the maximum length of a subarray where the product of all its elements is positive.</p>
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<p>A subarray of an array is a consecutive sequence of zero or more values taken out of that array.</p>
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<p>Return <em>the maximum length of a subarray with positive product</em>.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [1,-2,-3,4]
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<strong>Output:</strong> 4
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<strong>Explanation:</strong> The array nums already has a positive product of 24.
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [0,1,-2,-3,-4]
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<strong>Output:</strong> 3
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<strong>Explanation:</strong> The longest subarray with positive product is [1,-2,-3] which has a product of 6.
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Notice that we cannot include 0 in the subarray since that'll make the product 0 which is not positive.</pre>
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<p><strong>Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [-1,-2,-3,0,1]
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<strong>Output:</strong> 2
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<strong>Explanation:</strong> The longest subarray with positive product is [-1,-2] or [-2,-3].
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>1 <= nums.length <= 10<sup>5</sup></code></li>
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<li><code>-10<sup>9</sup> <= nums[i] <= 10<sup>9</sup></code></li>
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</ul>
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