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 Kotlin (1.3.71) (judge verdict: Runtime Error)

import kotlin.math.pow
import kotlin.system.exitProcess

fun main() {
    val numberOfNumbers = readLine()?.toInt()

    if (numberOfNumbers != null) {
        if(numberOfNumbers < 2 || numberOfNumbers > 10.0.pow(15.0)) {
            exitProcess(0)
        } else {
            val numbers = readLine()
            val numbers2 = numbers?.split(" ")?.map { it.toLong() }
            multiply(numbers2)
        }
    }
}

fun multiply(numbersToBeMultiplied: List<Long>?) {
    var result = 1L

    if (numbersToBeMultiplied != null) {
        for (item in numbersToBeMultiplied) {
            result *= item
        }
    }

    return if (result > 10.0.pow(18.0))
        println("-1")
    else
       println(result)
}