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: Wrong Answer)

function Main(input) {
    var tmp = input.split("\n");
    var num = parseInt(tmp[0]);
    var ary = tmp[1].split(" ");
    
    for(var n=0; n<num; n++){
        ary[n] = BigInt(ary[n]);
    }
    
    var count = BigInt(1);

    loop:
    if(ary.includes(0n)){
        console.log(0);
    }else{
        for(var i=0; i<num; i++){
            count = count * ary[i];
            var big = BigInt(10**18);
            if(count>big){
                console.log(-1);
                break loop;
            }
        }
        console.log(Number(count));
    }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));