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.util.function.*;
import java.math.*;
public class Main {
    public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		int N = s.nextInt();
		BigInteger lim = BigInteger.valueOf(1000000000000000000l);
		BigInteger ret = BigInteger.ONE;
		long[] A = new long[N];
		boolean end = false;
		for(int i = 0; i < N; i++) {
			A[i] = s.nextLong();
			if(A[i] == 0l) {
				System.out.println(0);
				return;
			}
		}
		for(int i = 0; i < N; i++) {
			ret = ret.multiply(BigInteger.valueOf(A[i]));
			if(ret.compareTo(lim) == 1) {
				System.out.println(-1);
				return;
			}
		}
		System.out.println(ret);
    }
}