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.math.BigInteger;
import java.util.*;
public class Main{
public static void main(String[]args) {
	Scanner sc = new Scanner (System.in);
	int a= sc . nextInt();
	ArrayList<Long> ar= new ArrayList<Long>();
	for(int i=0;i<a;i++) {
		long val = sc.nextLong();
		ar.add(val);
		if(val == 0) {
			System.out.println("0");
			return ;
		}
	}
	BigInteger prod= new BigInteger("1");
	for(long i:ar) {
		prod = prod.multiply(BigInteger.valueOf(i));
		if(prod .compareTo(BigInteger.valueOf((long) Math.pow(10, 18))) == 1) {
			System.out.println("-1");
			return;
		}
	}
	System.out.println(prod.longValue());
	
}
}
