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Formatted question description: https://leetcode.ca/all/2495.html
2495. Number of Subarrays Having Even Product
Description
Given a 0-indexed integer array nums, return the number of subarrays of nums having an even product.
Example 1:
Input: nums = [9,6,7,13] Output: 6 Explanation: There are 6 subarrays with an even product: - nums[0..1] = 9 * 6 = 54. - nums[0..2] = 9 * 6 * 7 = 378. - nums[0..3] = 9 * 6 * 7 * 13 = 4914. - nums[1..1] = 6. - nums[1..2] = 6 * 7 = 42. - nums[1..3] = 6 * 7 * 13 = 546.
Example 2:
Input: nums = [7,3,5] Output: 0 Explanation: There are no subarrays with an even product.
Constraints:
1 <= nums.length <= 1051 <= nums[i] <= 105