using System;

public class Program

{

    public static void Main()

    {

        int n;

        int i,j,k;

        Console.WriteLine("enter length");

        n=int.Parse(Console.ReadLine());

        k=0;

        Console.WriteLine("Enter comma separated values for first matrix -");

        string s1 = Console.ReadLine();

        string[] sNumFrst= s1.Split(',');

        Console.WriteLine("Enter comma separated values for second matrix -");

        s1 = Console.ReadLine();

        string[] sNumSec= s1.Split(',');

        //a[i,j]= int.Parse(Console.ReadLine());

        int[,] matf=new int[n,n];

        int[,] mats=new int[n,n];

        for( i=0;i<n;i++)

        {

            for( j=0;j<n;j++)

            {

                matf[i,j]= int.Parse(sNumFrst[k]);

                mats[i,j]= int.Parse(sNumSec[k]);

                k++;

            }

        }

        //make 4.

        int[,] a,b,c,d,e,f,g,h;

        a=new int[n/2,n/2];b=new int[n/2,n/2];c=new int[n/2,n/2];d=new int[n/2,n/2];

        e=new int[n/2,n/2];f=new int[n/2,n/2];g=new int[n/2,n/2];h=new int[n/2,n/2];

        for( i=0;i<n;i++)

        {

            for( j=0;j<n;j++)

            {

                if(j<n/2 && i<n/2)

                {

                    a[i,j]=matf[i,j];

                    e[i,j]=mats[i,j];

                }

                if(j>=n/2 && i<n/2)

                {

                    Console.WriteLine(i +"-"+j);

                    b[i,j-(n/2)]=matf[i,j];

                    f[i,j-(n/2)]=mats[i,j];

                }

                if(j<n/2 && i>=n/2)

                {

                    c[i-(n/2),j]=matf[i,j];

                    g[i-(n/2),j]=mats[i,j];

                }

                if(j>=n/2 && i>=n/2)

                {

                    d[i-(n/2),j-(n/2)]=matf[i,j];

                    h[i-(n/2),j-(n/2)]=mats[i,j];

                }

            }

        }

        for( i=0;i<n/2;i++)

        {

            for( j=0;j<n/2;j++)

            {

                Console.WriteLine("your data is - "+ a[i,j]);

                //a[i,j]= int.Parse(Console.ReadLine());

            }

        }

        Program p = new Program();

        int[,] c11=p.add(p.dc(a,e),p.dc(b,g));

    }

    public int[,] dc(int[,] x,int[,] y)

    {

        int i,j,k;

        int[,] a,b,c,d,e,f,g,h;

        int n=x.Length;

        a=new int[n/2,n/2];b=new int[n/2,n/2];c=new int[n/2,n/2];d=new int[n/2,n/2];

        e=new int[n/2,n/2];f=new int[n/2,n/2];g=new int[n/2,n/2];h=new int[n/2,n/2];

        if(x.Length > 2)

        {

            splitmat( x,y,a,b,c,d,e,f,g,h,n);

        }

        int[,] z = new int[2,2];

        for(i=0;i<2;i++)

        {

            for(j=0;j<2;j++)

            {

                for(k=0;k<2;k++)

                z[i,j]+=x[i,k]*y[k,j];

            }

        }

    }

    public void splitmat(int[,] matf,int[,] mats,int[,] a,int[,] b,int[,]c,int[,]d,int[,]e,int[,]f,int[,]g,int[,]h,int n)

    {

        int i , j;

​

        for( i=0;i<n;i++)

        {

            for( j=0;j<n;j++)

            {

                if(j<n/2 && i<n/2)

                {

                    a[i,j]=matf[i,j];

                    e[i,j]=mats[i,j];

                }

                if(j>=n/2 && i<n/2)

                {

                    b[i,j-(n/2)]=matf[i,j];

                    f[i,j-(n/2)]=mats[i,j];

                }

                if(j<n/2 && i>=n/2)

                {

                    c[i-(n/2),j]=matf[i,j];

                    g[i-(n/2),j]=mats[i,j];

                }

                if(j>=n/2 && i>=n/2)

                {

                    d[i-(n/2),j-(n/2)]=matf[i,j];

                    h[i-(n/2),j-(n/2)]=mats[i,j];

                }

            }

        }

    }

    public int[,] add(int[,] a,int[,] b)

    {

    }

}