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 $ .