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.*;

class Main{

  public static void main(String args[]){

    Scanner s=new Scanner(System.in);
    int N=s.nextInt();
    long[] List=new long[N];
    for(int i=0;i<N;i++) List[i]=s.nextLong();
    Arrays.sort(List);
    double d=0d;
    for(int i=0;i<N;i++) d+=Math.log10(List[i]);
    long ans=1;
    long comp=(long)Math.pow(10,18);
    
    if(d<=18){
      for(int i=0;i<N;i++) ans*=List[i];
      if(ans<=1000000000000000000L) System.out.println(ans);
      else System.out.println(-1);
    }
    else System.out.println(-1);  
  }  
}