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
#include <stdio.h>
long long n, i, a, s=1, d=1e18;
double t=1;
int main(){
	scanf("%lld", &n);
	for(i=1; i<=n; i++){
		scanf("%lld", &a);
		s = s * a;
		t = t * a;
	}
	if(s > d || t > d) printf("-1\n");
	else printf("%lld\n", s);
	return 0;
}