You are given an array nums.
A split of an array nums is beautiful if:
nums is split into three subarrays: nums1, nums2, and nums3, such that nums can be formed by concatenating nums1, nums2, and nums3 in that order.nums1 is a prefix of nums2 OR nums2 is a prefix of nums3.Return the number of ways you can make this split.
\n\n\n
Example 1:
\n\nInput: nums = [1,1,2,1]
\n\nOutput: 2
\n\nExplanation:
\n\nThe beautiful splits are:
\n\nnums1 = [1], nums2 = [1,2], nums3 = [1].nums1 = [1], nums2 = [1], nums3 = [2,1].Example 2:
\n\nInput: nums = [1,2,3,4]
\n\nOutput: 0
\n\nExplanation:
\n\nThere are 0 beautiful splits.
\n\n
Constraints:
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