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 JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

function Main(input) {
	var str = input;
	var ans = 1n;
	var flg = true;
	var count = 1;
	var str = str.split("\n");
	var a = str[1].split(" ");
	for(var j = 0;j<a.length;j++){
		a[j]=BigInt(a[j]);
		if(a[j]===0n){
			ans = 0;
			break;
		}
	}
	if(ans !==0){
	for(var i = 0;i<a.length;i++){
		ans = ans*a[i];

		if(ans > 10**18){
			ans = -1;
          break;
			}
    	}
  	if(ans !== -1){
  	ans = ans.toString();
    }
	}
   console.log(ans);
   }
Main(require("fs").readFileSync("/dev/stdin", "utf8"));