b = (int**)malloc(m*sizeof(int*));
	for (i = 0; i < n; i++)
		*(b + i) = (int*)malloc(n*sizeof(int));

	for (i = 0, *d = 0; i<n; i++)
	{
		u = true;
		for (j = 0; (j<m) && (u==true); j++)
			if (a[i][j] < (i+j))
				u=false;

		if (u==true)
		{
			for (k = 0; k<m; k++)
			{
				b[k] = (int*)realloc(b[k], (*d+1)*sizeof(int));
				b[*d][k] = a[i][k];
			}
			(*d)++;
		}