Problem:
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

Solution in Scala (2.13.1) (judge verdict: Wrong Answer)

object Main extends App {
  import java.io.{BufferedOutputStream, BufferedReader, InputStreamReader, PrintWriter}
  val in=new BufferedReader(new InputStreamReader(System.in))
  val out = new PrintWriter(new BufferedOutputStream(System.out))
  var ans = 1L
  var flag = false
  var flag2=false
  val n = in.readLine().toInt
  in.readLine().split(" ").map(x => if(x.toLong == 0)flag=true else if(ans * x.toLong > 1000000000000000000L) flag2=true else ans *= x.toLong)
  out.println(if(flag) 0 else if(flag2) -1 else ans )
  out.flush()
}