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#ifndef _COMMON_H
#define _COMMON_H
#include "structs.h"
#define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
#define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
struct data * input(char[]);
void print_data(struct data *);
void print_front(struct front_item *);
void free_data(struct data *);
void free_front(struct front_item *);
struct front_item * new_front_item(double, double, struct front_item *, struct front_item *);
double dist_items(struct item *, struct item *);
int len_front(struct front_item *);
int cmp_items_ratio(const void * a, const void * b);
#endif
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