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.lang.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		long[] A = new long[N];
		long ans = 1;
		long LL = 1000000000000000000L;
		for( int i=0; i<N; i++ ){
			A[i] = sc.nextLong();
		}
		Arrays.sort(A);
		for( int i=0; i<N; i++ ){
			if( A[i]==0 || ans==0 ){
				System.out.println(0);
				break;
			}else if( ans>LL/A[i] ){
				System.out.println(-1);
				break;
			}else{
				ans = ans * A[i];
			}
			if( i==N-1 ){
				System.out.println(ans);
			}
		}
	}
}