Rotate_copy copies elements from the range [first, last) to the range [result, result + (last – first)) such that *middle is copied to *result, *(middle + 1) is copied to *(result + 1), and so on. Formally, for every integer n such that 0 <= n < last – first, rotate_copy performs the assignment *(result + (n + (last – middle)) % (last – first)) = *(first + n). Rotate_copy is similar to copy followed by rotate, but is more efficient. The return value is result + (last – first).Description