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 C# (Mono-mcs 6.8.0.105) (judge verdict: Runtime Error)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace ConsoleApplication2
{

    class Program
    {
        static void Main(string[] args)
        {

            string[] input = Console.ReadLine().Split(' ');
            string[] input2 = Console.ReadLine().Split(' ');

            long  num1, num2, mass;
            long result = 1;
            mass = long.Parse(input[0]);
            for (int i = 0; i < mass; i++)
            {
                result *= long.Parse(input2[i]);
            }



            Console.WriteLine(result > 1000000000000000000 ? -1 : result);


        }
    }
}