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.*;

public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int size = sc.nextInt(), zero = 0;
		BigInteger nums[] = new BigInteger[size];
		for(int i = 0; i < size; i++){
			String str = sc.next();
			if(str.equals("0")){zero++;}
			nums[i] = new BigInteger(str);
		}
		if(zero > 0){System.out.println("0"); return;}
		BigInteger base = new BigInteger("1000000000000000000"), ans = BigInteger.ONE;
		for(BigInteger num : nums){
			if(num.compareTo(base) > 0){
				System.out.println("-1"); return;
			} else {
				ans = ans.multiply(num);
				base = base.divide(num);
			}
		}
		System.out.println(ans);
	}
}