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 PHP (7.4.4) (judge verdict: Wrong Answer)

<?php
fscanf(STDIN, '%d', $cnt);
$nums = array_map('intval', explode(' ', trim(fgets(STDIN))));
$ans = true;
for ($i=0; $i < $cnt; $i++) { 
    (int)$ans *= $nums[$i];
}
$limit = pow(10, 18);
if ($ans > $limit) {
    $ans = -1;
} 
echo $ans;