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.*;
 
public class Main{
	public static void main(String[] args){
	    Scanner sc = new Scanner(System.in);
    	int num = sc.nextInt();
        long number[] = new long[num];
        long mul = 1;
        for(int i = 0; i < num; i++){
        	number[i] = sc.nextLong();
            if(number[i] == 0){
            	mul = 0;
            }
        }
        if(mul != 0){
        	for(int i = 0; i < num; i++){
          		if(number[i] <= (long)Math.pow(10,18)/mul){
        			mul = mul * number[i];
          		}else{
          			mul = -1;
                    break;
                }
          	}
        }
        System.out.println(mul);
	}
}