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

typedef struct {long int n; long unsigned int d}rational;

rational convert_int(int);

bool is_greater(rational,rational);

rational sum(rational,rational);

rational difference(rational,rational);

rational product(rational,rational);

rational ratio(rational,rational);

rational absolute(rational);

rational power(rational,unsigned int);

double to_double(rational);