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 s = new Scanner(System.in);

		long num = s.nextLong();
		long mul = 1;
		ArrayList<Long> inputs = new ArrayList<>();
		for (int i = 0; i < num; i++) {
			inputs.add(s.nextLong());
		}
		
		Collections.sort(inputs);
					
		if (inputs.get(0) == 0) {
			    System.out.println(0);
			    System.exit(0);
		
		}
		
		for(long l:inputs) {
			
			mul *= l;
			
            if (mul < l) {
    			System.out.println(-1);
    			System.exit(0);
            }	
		}
		

		if (mul > 1000000000000000000L) {
			System.out.println(-1);
		}

		else {
			System.out.println(mul);
		}
		

	}

}
