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;

namespace fight2
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            string[] input =Console.ReadLine().Split(" ");
            long[] A = new long[input.Length];
            for (int i = 0; i < A.Length; i++)
                A[i] = int.Parse(input[i]);
            long ans = A[0] * A[1];
            if (N == 2) 
            {
                Console.WriteLine(ans); 
            }
            else
            {
                for (int caunto = 2; caunto <= N - 1; caunto++)
                {
                    long itiji = ans;
                    ans = itiji * A[caunto];
                }
                if (ans > 1000000000000000000)
                {
                    int z = -1;
                    Console.WriteLine(z);
                }
                else
                {
                    Console.WriteLine(ans);

                }
            }





        }
    }
}