using System;

namespace ConsoleApplication1
{
    class Matrix2
    {
        int a11=0, a12=0, a21=0, a22=0;
        int[,] matrix = new int[2, 2];
        public Matrix2(int a11, int a12, int a21, int a22)
        {
            matrix[0, 0] = a11;
            matrix[0, 1] = a12;
            matrix[1, 0] = a21;
            matrix[1, 1] = a22;
        }
        public Matrix2(int a11,int a22)
        {
            matrix[0, 0] = a11;
            matrix[1, 1] = a22;
        }
        public Matrix2(Matrix2 A)
        {
            matrix = A.matrix;
        }
        public int Det()
        {
            return matrix[0, 0] * matrix[1, 1] - matrix[0, 1] * matrix[1, 0];
        }
        public int[,] Inverse()
        {
            int[,] invmatrix = new int[2, 2];
            int k;
            k = invmatrix[0, 1];
            invmatrix[0, 0] = matrix[1,1];
            invmatrix[0,0] = k;
            invmatrix[0,1] *= -1;
            invmatrix[1,0] *= -1;
            return invmatrix;
        }
        public int[,] Transpose()
        {
            int[,] tranmatrix= new int[2, 2];
            for (int j = 0; j < matrix.GetLength(1); j++)
                for (int i = 0; i < matrix.GetLength(1); i++)
                    tranmatrix[i, j] = matrix[j, i];
            return tranmatrix;
        }
        public static int[,] operator +(Matrix2 Arr1, Matrix2 Arr2)
        {
            int[,] sum = new int[2,2];
            for (int i = 0; i< sum.GetLength(1); i++)
                for (int j = 0; j < sum.GetLength(1); j++)
                    sum[i, j] = Arr1.matrix[i, j] + Arr2.matrix[i, j];
            return sum;
        }
        public static int[,] operator -(Matrix2 Arr1, Matrix2 Arr2)
        {
            int[,] residual = new int[2, 2];
            for (int i = 0; i < residual.GetLength(0); i++)
                for (int j = 0; j < residual.GetLength(1); j++)
                    residual[i, j] = Arr1.matrix[i, j] + Arr2.matrix[i, j];
            return residual;
        }
        public static int[,] operator *(Matrix2 Arr1, Matrix2 Arr2)
        {
            int[,] multi = new int[2, 2];
            multi[0, 0] = Arr1.matrix[0, 0] * Arr2.matrix[0, 0] + Arr1.matrix[0, 1] * Arr2.matrix[1, 0];
            multi[0, 1] = Arr1.matrix[0, 0] * Arr2.matrix[0, 1] + Arr1.matrix[0, 1] * Arr2.matrix[1, 1];
            multi[1, 0] = Arr1.matrix[1, 0] * Arr2.matrix[0, 0] + Arr1.matrix[1, 1] * Arr2.matrix[1, 0];
            multi[1, 1] = Arr1.matrix[1, 0] * Arr2.matrix[0, 1] + Arr1.matrix[1, 1] * Arr2.matrix[1, 1];
            return multi;
        }
        public static int[,] operator *(Matrix2 Arr1, int k)
        {
            int[,] multi = new int[2, 2];
            multi[0, 0] = Arr1.matrix[0, 0] * k;
            multi[0, 1] = Arr1.matrix[0, 1] * k;
            multi[1, 0] = Arr1.matrix[1, 0] * k;
            multi[1, 1] = Arr1.matrix[1, 1] * k;
            return multi;
        }
        public static int[,] operator /(Matrix2 Arr1, int k)
        {
            int[,] del = new int[2, 2];
            del[0, 0] = Arr1.matrix[0, 0] / k;
            del[0, 1] = Arr1.matrix[0, 1] / k;
            del[1, 0] = Arr1.matrix[1, 0] / k;
            del[1, 1] = Arr1.matrix[1, 1] / k;
            return del;
        }
        public override string ToString()
        {
            return string.Format("{0}\t{1}\n{2}\t{3}", matrix[0,0], matrix[0,1], matrix[1,0], matrix[1,1]);
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            int[,] matrix = new int[2,2];
            Matrix2 mat = new Matrix2(1,2,3,4);
            Matrix2 mat1 = new Matrix2(1, 2);
            Console.WriteLine(mat.Det());
            matrix = mat + mat1;
            Console.WriteLine(mat.ToString());
            matrix = mat1 * 5;
            Console.WriteLine(matrix);
        }
    }
}