Given N integers A_1, ..., A_N, compute A_1 \times ... \times A_N.

However, if the result exceeds 10^{18}, print `-1` instead.

Constraints

* 2 \leq N \leq 10^5
* 0 \leq A_i \leq 10^{18}
* All values in input are integers.

Input

Input is given from Standard Input in the following format:


N
A_1 ... A_N


Output

Print the value A_1 \times ... \times A_N as an integer, or `-1` if the value exceeds 10^{18}.

Examples

Input

2
1000000000 1000000000


Output

1000000000000000000


Input

3
101 9901 999999000001


Output

-1


Input

31
4 1 5 9 2 6 5 3 5 8 9 7 9 3 2 3 8 4 6 2 6 4 3 3 8 3 2 7 9 5 0


Output

0
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		// 入力値の取得
		int N = sc.nextInt();
		long[] A = new long[N];

		for (int i = 0; i < N; i++) {
			A[i] = sc.nextLong();
			if (A[i] == 0) {
				System.out.println(0);
				sc.close();
				return;
			}
		}

		long product = 1;
		for (long a : A) {
			try {
				product = Math.multiplyExact(product, a);

				if (product > (long) Math.pow(10, 18)) {
					System.out.println(-1);
					sc.close();
					return;
				}
			} catch (Exception e) {
				System.out.println(-1);
				sc.close();
				return;
			}
		}

		// 結果の出力
		System.out.println(product);

		sc.close();
	}
}
