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.*;
import java.math.RoundingMode;
import java.math.BigDecimal;
 
 
 
public class Main{
	 public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long[] a = new long[n];
		for(int i = 0; i < n; i++) {
			a[i]= sc.nextLong();
		}
		Arrays.sort(a);
		long max = 1;
		for(int i = 0; i < 18; i++) {
			max*=10;
		}
		BigDecimal max1 = BigDecimal.valueOf(max);
		BigDecimal ans = BigDecimal.valueOf(1);
		
		for(int i = 0; i < n; i++) {
			BigDecimal a1 = BigDecimal.valueOf(a[i]);
			ans = ans.multiply(a1);
			if(ans.compareTo(max1)>0) {
				ans = BigDecimal.valueOf(-1);
				break;
			}
		}
		if(ans.compareTo(max1)>0) {
			ans = BigDecimal.valueOf(-1);
		}
		System.out.println(ans);
	 }
}
