using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public void sss(string emailaddress)

{

        Regex.IsMatch(emailaddress, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");

​

    }

    public static void Main()

    {

        int [] std_n = new int[10];

        int [] std_marks = new int[10];

        for (int c=0 ; c < 10 ; c++)

        {

            Console.WriteLine("Enter the id number of student "+(c+1));

            std_n[c]=int.Parse(Console.ReadLine());

            Console.WriteLine("Enter the mark of student "+(c+1));

            std_marks[c]=int.Parse(Console.ReadLine());

        }

        for (int c=0 ; c < 10 ; c++)

            Console.WriteLine("Student number "+std_n[c]+ " got " + std_marks[c]);

        int [,] std_all = new int[10,10];

                for (int c=0 ; c < 10 ; c++)

                {

                    int cc=0;

                    std_all[c,cc]=std_n[c];

                    std_all[c,cc+1]=std_marks[c];

                }

        for (int c=0 ; c < 10 ; c++)

        {

            int cc=0;

            Console.WriteLine("Student number "+std_all[c,cc] + " got " + std_all[c,cc+1]);

        }

​

    }

}