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Number of Unique XOR Triplets II

You are given an integer array nums.

You are given an integer array nums.

A XOR triplet is defined as the XOR of three elements nums[i] XOR nums[j] XOR nums[k] where i <= j <= k.

Return the number of unique XOR triplet values from all possible triplets (i, j, k).

Number of Unique XOR Triplets II diagram

Example 1

Input: nums = [1,3]

Output: 2

Explanation: The possible XOR triplet values are: The unique XOR values are {1, 3} . Thus, the output is 2.

Example 2

Input: nums = [6,7,8,9]

Output: 4

Explanation: The possible XOR triplet values are {6, 7, 8, 9} . Thus, the output is 4.

Constraints

  • 1 <= nums.length <= 1500
  • 1 <= nums[i] <= 1500

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