#include <stdio.h>
#include <stdlib.h>

/* #define ENABLE_LOG */

#ifdef ENABLE_LOG
#  define LOG(x) x
#else
#  define LOG(x) (void) 0 
#endif

typedef struct borders {
  double north;
  double east;
  double south;
  double west;
} borders;

double **create_matrix(int rows, int cols);

void print_matrix(double **x, int rows, int cols);
void destroy_matrix(double **x, int rows);