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Homework: Has 271

Imported By: Geoffrey Challen
/ Version: 2021.5.0
/ Adapted from CodingBat

Given an int[], return true if it contains a 2, 7, 1 pattern: a value, followed by the value plus 5, followed by the value minus 1. Additionally the 271 counts even if the 1 differs by 2 or less from the correct value.