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.*;

public class Main {
public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		int N= keyboard.nextInt();
		long[] a = new long[N];
		
		for(int i =0; i<N; i++) {
			a[i] = keyboard.nextLong();			
		}
		Arrays.sort(a);
		
		long cons = 1000000000000000000L;
		long ans = 1 ;
		
		for(int j=0; j<N; j++) {
			if(a[j] !=0) {
				if(a[j]<=cons && a[j] <= cons/ans) {
					ans = ans*a[j];	
				}else {
					ans = -1;
					break;
				}
			}else{
				ans = 0;
				break;
			}
		}
		
		System.out.print(ans);
		keyboard.close();	
		
	}
}
