using System;

​

​

​

public class Matrice{

    public  int n;

    public  int[,] a;

    public  double[,] invers;

    public  Matrice(int x){

        n=x;

    }

    public void Creare(int n){

        a=new int[n,n];

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

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

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

            }

        }

    }

    public void Afis(){

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

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

                Console.Write(a[i,j] + " ");

            }

            Console.WriteLine();

        }

    }

    public int Det(int[,] a,int n){

        if(n==2){

            return a[0,0] * a[1,1] - a[0,1] * a[1,0];

        }

        return (a[0,0] * a[1,1] * a[2,2]) + (a[1,0] * a[2,1] * a[0,2]) + (a[2,0] * a[0,1] * a[1,2]) - (a[0,2] * a[1,1] * a[2,0]) - (a[1,2] * a[2,1] * a[0,0]) - (a[2,2] * a[0,1] * a[1,0]);

    }

    public void Inv(int [,] a, int n){

        int d = Det(a,n);

        if(d!=0){

                invers = new double[n,n];

                if(n==2){

                    invers[0,0]= 1/d * a[0,0];

                    invers[0,1]=1/d * -a[1,0];

                    invers[1,0]=1/d * -a[0,1];

                    invers[1,1]=1/d * a[1,1];

                }else{

                    invers[0,0] = 1/d * (a[1,1]*a[2,2]-a[1,2]*a[2,1]);

                    invers[1,0] = -1/d * (a[0,1]*a[2,2]-a[0,2]*a[2,1]);

                    invers[2,0] = 1/d * (a[0,1]*a[1,2]-a[0,2]*a[1,1]);

                    invers[0,1] = -1/d * (a[1,0]*a[2,2]-a[1,2]*a[2,0]);

                    invers[1,1] = 1/d * (a[0,0]*a[2,2]-a[0,2]*a[2,0]);

                    invers[2,1] = -1/d * (a[0,0]*a[1,2]-a[0,2]*a[1,0]);

                    invers[0,2] = 1/d * (a[1,0]*a[2,1]-a[1,1]*a[2,0]);

                    invers[1,2] = -1/d * (a[0,0]*a[2,1]-a[0,1]*a[2,0]);

                    invers[2,2] = 1/d * (a[0,0]*a[1,1]-a[0,1]*a[1,0]);

                }

        }

    }

    public void AfisInv(){

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

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

                Console.Write(invers[i,j] + " ");

            }

            Console.WriteLine();

        }

    }

}

​

public class Program

{

    public static void Main()

    {

        int n,m;

        Matrice a,b;

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

        a = new Matrice(n);

        a.Creare(n);

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

        b = new Matrice(m);

        b.Creare(m);

        Console.WriteLine("Matrice 1:");

        a.Afis();

        Console.WriteLine("Matrice 2:");

        b.Afis();

        Console.WriteLine("determinant 1:");

        Console.WriteLine(a.Det(a.a,n));

        Console.WriteLine("determinant 2:");

        Console.WriteLine(b.Det(b.a,m));

        Console.WriteLine("invers 1:");

        a.AfisInv();

        Console.WriteLine("invers 2:");

        b.AfisInv();

    }

}

​