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.Scanner;
import java.util.Arrays;
public class Main
{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		BigInteger[] A = new BigInteger[N];
		BigInteger comp = new BigInteger("1000000000000000000");
		for(int i=0;i<N;i++)
		{
		    A[i]=sc.nextBigInteger();
		}
		Arrays.sort(A); 
		BigInteger ans = A[0];
		for(int i=1;i<N;i++)
		{
		    ans = ans.multiply(A[i]);
		    if(ans.compareTo(comp)>0 || ans.equals(0))
		    {
		        break;
		    }
		}
		if(ans.compareTo(comp)>0)
		{
		   System.out.println(-1);
		}
		else{
		    System.out.println(ans);
		}
	}
}
