Snuke had N cards numbered 1 through N.
Each card has an integer written on it; written on Card i is a_i.
Snuke did the following procedure:
- Let X and x be the maximum and minimum values written on Snuke's cards, respectively.
- If X = x, terminate the procedure. Otherwise, replace each card on which X is written with a card on which X-x is written, then go back to step 1.
Under the constraints in this problem, it can be proved that the procedure will eventually terminate. Find the number written on all of Snuke's cards after the procedure.

-----Constraints-----
- All values in input are integers.
- $1 \leq N \leq 10^{5}$
- $1 \leq a_i \leq 10^9$

-----Input-----
Input is given from Standard Input in the following format:
N
$a_1 a_2 \cdots a_N$

-----Output-----
Print the number written on all of Snuke's cards after the procedure.

-----Sample Input-----
3
2 6 6

-----Sample Output-----
2

• At the beginning of the procedure, the numbers written on Snuke's cards are (2,6,6).
• Since x=2 and X=6, he replaces each card on which 6 is written with a card on which 4 is written.
• Now, the numbers written on Snuke's cards are (2,4,4).
• Since x=2 and X=4, he replaces each card on which 4 is written with a card on which 2 is written.
• Now, the numbers written on Snuke's cards are (2,2,2).
• Since x=2 and X=2, he terminates the procedure.

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