The largest even number in the array

Given an array of n integers, your task is to find the largest even number in the array. If there are no even numbers, output NO.

Input

The first line contains the integer n (1 ≤ n ≤ 100), representing the number of elements in the array. The second line contains n integers, each with an absolute value not exceeding 100.

Output

Print the largest even number, or NO if no even numbers are present.

Examples