You are given an array of $n$ positive integers. Your task is to find two integers such that their greatest common divisor is as large as possible.

Input

The first input line has an integer $n$: the size of the array.

The second line has $n$ integers $x_1,x_2,\ldots,x_n$: the contents of the array.

Output

Print the maximum greatest common divisor.

Constraints

• $2 \le n \le 2 \cdot 10^5$
• $1 \le x_i \le 10^6$

Example

Input:

5
3 14 15 7 9

Output:

7