Problem Statement

Given $N integers A_1, ..., A_N, compute A_1 \times ... \times A_N$.
However, if the result exceeds 10^{18}, print -1 instead.

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}.

Constraints

• $2 \leq N \leq 10^5$
• $0 \leq A_i \leq 10^{18}$
• All values in input are integers.

Sample Input 1

2
1000000000 1000000000

Sample Output 1

1000000000000000000

We have $1000000000 \times 1000000000 = 1000000000000000000$.

Sample Input 2

3
101 9901 999999000001

Sample Output 2

-1

We have $101 \times 9901 \times 999999000001 = 1000000000000000001, which exceeds 10^{18}$, so we should print -1 instead.

Sample Input 3

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

Sample Output 3

0

见题面 Input 部分

见题面 Output 部分