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 inp = input.trim();
    var inpArray=inp.split('\n');
    var n = parseInt(inpArray[0]);
    var numArray = inpArray[1].split(' ');
    var out = 1 / 1000000000;
    for(i=0;i<n;i++){
        out = out * parseInt(numArray[i]);
        if(out>1000000000){
            out=-1;
            break;
        }
    }
    for(i=0;i<n;i++){
        if(parseInt(numArray[i])==0){
            out=0;
            break;
        }
    }
    console.log(out);
     
}
     
    main(require("fs").readFileSync("/dev/stdin", "utf8"));