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.BigInteger;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int num = sc.nextInt();
    BigInteger ans  = BigInteger.ONE;
    long l = (long)Math.pow(10,18);
    BigInteger L = BigInteger.valueOf(l);
    while(sc.hasNext()){
      long a = sc.nextLong();
      if (a == 0) {
        ans = BigInteger.ZERO;
      } else if (ans.compareTo(L) <= 0) {
        ans = ans.multiply(BigInteger.valueOf(a));
      }
    }
    if(ans.compareTo(L) <= 0){
      System.out.println(ans);
    }else{
      System.out.println(-1);
    }
  }  
}