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.BigDecimal;

public class Main {
  public static void main (String args[]) {
    Scanner sc = new Scanner(System.in);
    
    int N = sc.nextInt();
    String A[] = new String[N];
    BigDecimal C = new BigDecimal("1000000000000000000");
    String B = "";
    
    for(int i=0; i<N; i++) {
      A[i] = sc.next();
    }
    Arrays.sort(A);
    BigDecimal z = new BigDecimal("0");
    BigDecimal b = new BigDecimal("1");
    for(int j=0; j<N; j++) {
      BigDecimal b1 = new BigDecimal(A[j]);
      b= b.multiply(b1);
      if(b.compareTo(z) == 0) {
        break;
      } else if(b.compareTo(C) > 0) {
        b = new BigDecimal("-1");
        break;
      }
    }
    System.out.println(b);
  }
}