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.

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 $10^{18}$.