import java.util.Random;
class apiPromMatriz
{
	public static void main(String[]a)
	{
		final Random RANDOM = new Random();
		int [][] mt = new int [ RANDOM.nextInt(4)+2 ][RANDOM.nextInt(4)+2];
		llenarMatriz(mt,RANDOM);
		mostrarMatriz(mt);
		promedioMatriz(mt);
	}

	public static void llenarMatriz(int[][]mt, Random RANDOM)
	{
		for (int i=0; i<mt.length; i++)
			for (int j=0; j<mt[i].length; j++)
				mt[i][j] = RANDOM.nextInt(11);
	}

	public static void mostrarMatriz(int[][]mt)
	{
		for (int i=0; i<mt.length; i++)
		{
			System.out.println();
			for (int j=0; j<mt[i].length; j++)
				System.out.printf("\t%d",mt[i][j]);
		}
		System.out.println();
	}

	public static void promedioMatriz(int[][]mt)
	{
		int[]aux = new int [ mt[0].length ];
		for (int i=0; i<mt.length; i++)
			for (int j=0; j<mt[i].length; j++)
				aux[j] += mt[i][j];
		for (int i=0; i<aux.length; i++)
		{
			aux[i] = aux[i]/mt[0].length;
			System.out.printf("\nPromedio columna %d: %d",i+1,aux[i]);
		}
	}
}

	public void cLatino(int[][]mt, int fila, int col)
	{
		if	(	(fila+col+1)==mt.length	)
			mt[fila][col] = 1;
		else if	(	(fila+col)>=mt.length	)
			mt[fila][col] = (fila+col+2)-mt.length;

		if	(	col<mt.length-1	)	col++;
		else if	(	fila<mt.length-1	)	{	fila++;	col=0;	}
		else	return;

		cLatino(mt,fila,col);
	}

	public void Latino(int[][]Mt)
	{	cLatino(Mt,0,0);	}