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Contest: Task: Related: TaskA TaskC

Score : $200$ points

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 $10^{18}$.

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