{ "data": { "question": { "questionId": "2170", "questionFrontendId": "2044", "boundTopicId": null, "title": "Count Number of Maximum Bitwise-OR Subsets", "titleSlug": "count-number-of-maximum-bitwise-or-subsets", "content": "

Given an integer array nums, find the maximum possible bitwise OR of a subset of nums and return the number of different non-empty subsets with the maximum bitwise OR.

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An array a is a subset of an array b if a can be obtained from b by deleting some (possibly zero) elements of b. Two subsets are considered different if the indices of the elements chosen are different.

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The bitwise OR of an array a is equal to a[0] OR a[1] OR ... OR a[a.length - 1] (0-indexed).

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Example 1:

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\nInput: nums = [3,1]\nOutput: 2\nExplanation: The maximum possible bitwise OR of a subset is 3. There are 2 subsets with a bitwise OR of 3:\n- [3]\n- [3,1]\n
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Example 2:

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\nInput: nums = [2,2,2]\nOutput: 7\nExplanation: All non-empty subsets of [2,2,2] have a bitwise OR of 2. There are 23 - 1 = 7 total subsets.\n
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Example 3:

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\nInput: nums = [3,2,1,5]\nOutput: 6\nExplanation: The maximum possible bitwise OR of a subset is 7. There are 6 subsets with a bitwise OR of 7:\n- [3,5]\n- [3,1,5]\n- [3,2,5]\n- [3,2,1,5]\n- [2,5]\n- [2,1,5]
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Constraints:

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