Given a list of integers nums, return the number of contiguous arithmetic sequences of length ≥ 3.
Constraints
n ≤ 10,000 where n is length of nums.https://binarysearch.com/problems/Arithmetic-Sequences
Input
[5, 7, 9, 11, 12, 13]Output
4Explanation
We have the following arithmetic sequences:
[5, 7, 9][7, 9, 11][5, 7, 9, 11][11, 12, 13]Given a list of integers nums, remove numbers that appear multiple times in the list, while maintaining order of the appearance in the original list.
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