CF452F Permutation

Description

You are given a permutation of numbers from $ 1 $ to $ n $ . Determine whether there's a pair of integers $ a,b $ $ (1

Input Format

N/A

Output Format

N/A

Explanation/Hint

In the second example $ 2 $ is between $ 1 $ and $ 3 $ . Additionally $ 4 $ is between $ 3 $ and $ 5 $ .