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# (.NET Core 3.1.201) (judge verdict: Runtime Error)

using System;
class Program
    {
        static void Main()
        {
            var n = int.Parse(Console.ReadLine());
            String[] a = Console.ReadLine().Split();
            long sum = 1;
            for (int i = 0; i < n; i++)
            {
                sum *= long.Parse(a[i]);
                Console.WriteLine(sum);
            }
            if (sum > 1000000000000000000||sum<0) sum = -1;
            Console.WriteLine(sum);
        }
    }