Given a list of numbers, return true if it follows the “231” pattern, namely that the list has a value x, followed by x+ 1, followed by x−1. You don’t have to print out what the numbers were, but we listed them in the example outputs for extra clarity. # [1,2,3,4,5] -> False (doesn’t contain the pattern) # [74,3,4,2,74,75,2] -> True (3,4,2 satisfies the pattern) # [74,75,0,1,-1,100] -> True (0,1,-1 satisfies the pattern) def has231(arr) :

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