Problem:
Multiplication of Big Integers

Given two integers $A$ and $B$, compute the product, $A \times B$.

Input

Two integers $A$ and $B$ separated by a space character are given in a line.

Output

Print the product in a line.

Constraints

$-1 \times 10^{1000} \leq A, B \leq 10^{1000}$

Sample Input 1

5 8

Sample Output 1

40

Sample Input 2

100 25

Sample Output 2

2500

Sample Input 3

-1 0

Sample Output 3

0

Sample Input 4

12 -3

Sample Output 4

-36

Solution in C# (judge verdict: Accepted)

using System.Numerics;
using System;

public class Hello
{
    public static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        BigInteger a = BigInteger.Parse(line[0]);
        BigInteger b = BigInteger.Parse(line[1]);
        Console.WriteLine(a * b);
    }
}