Problem:
Score : 100 points

Problem Statement

Compute A \times B.

Constraints

1 \leq A \leq 100

1 \leq B \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the value A \times B as an integer.

Sample Input 1

2 5

Sample Output 1

10

We have 2 \times 5 = 10.

Sample Input 2

100 100

Sample Output 2

10000

Solution in JavaScript (Node.js 12.16.1) (judge verdict: Wrong Answer)

const input = require('fs').readFileSync('/dev/stdin', 'utf8').split('\n');
const n = Number(input[0]);
const a = input[1].split(' ').map(Number);
let ans = 1;
for (let i = 0; i < n; i++){
    ans = ans * a[i];
}
if (1000000000000000000 < ans) {return console.log(-1);}
console.log(ans);