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)throws Exception{
		Scanner stdIn=new Scanner(System.in);
		int N=stdIn.nextInt();
		long A[]=new long[N];
		for(int i=0;i<N;i++){
			A[i]=stdIn.nextLong();
			if(A[i]==0){
				System.out.println(0);
				System.exit(0);
			}
		}
		try{
			long sum=1,key=1;
			key*=Math.pow(10,9);
			key*=Math.pow(10,9);
			for(int i=0;i<N;i++){
				sum=Math.multiplyExact(sum,A[i]);
			}
			if(sum>key)
				System.out.println(-1);
			else
				System.out.println(sum);
		}
		catch(Exception e){
			System.out.println(-1);
		}
	}
}
