using System;
class Matrix {
    public int n, m;
    public int[,] x = new int[50, 50];
    public Matrix(int n, int m) {
        int i, j;
        this.n = n;
        this.m = m;
        for (i = 0; i < n; i++)
            for (j = 0; j < m; j++)
                x[i, j] = 0;
    }
    public Matrix(int n, int m, int[,] x) {
        int i, j;
        this.n = n;
        this.m = m;
        for (i = 0; i < n; i++)
            for (j = 0; j < m; j++)
                this.x[i, j] = x[i,j];
    }
    static public Matrix operator ++(Matrix a) {
        int i, j;
        for (i = 0; i < a.n; i++) {
            for (j = 0; j < a.m; j++) {
                if (a.x[i, j] % 2 == 0) a.x[i,j]++;
            }
        }
        return a;
    }
    static public Matrix operator --(Matrix a) {
        int i, j;
        for (i = 0; i < a.n; i++) {
            for (j = 0; j < a.m; j++) {
                if (a.x[i, j] % 2 != 0) a.x[i,j]--;
            }
        }
        return a;
    }
    public void kiir(String s) {
        int i, j;
        Console.WriteLine("\n{0}",s);
        for (i = 0; i < n; i++) {
            for (j = 0; j < m; j++) {
                Console.Write("{0} ", x[i, j]);
            }
            Console.Write("\n");
        }
    }
}
class Program {
    static void Main() {
        int n, m, i, j;
        int[,] x = new int[50,50];
        Console.Write("n = ");
        n = Convert.ToInt32(Console.ReadLine());
        Console.Write("m = ");
        m = Convert.ToInt32(Console.ReadLine());
        for (i = 0; i < n; i++) {
            for (j = 0; j < m; j++) {
                Console.Write("a[{0},{1}] = ",i,j);
                x[i, j] = Convert.ToInt32(Console.ReadLine());
            }
        }
        Matrix m1 = new Matrix(n, m, x);
        m1.kiir("A tomb:");
        m1++;
        m1.kiir("A megnovelt tomb:");
        m1--;
        m1.kiir("A csokkentett tomb:");
        Console.ReadKey();
    }
}