jpp/lab1/zad1/include/mod.h

#ifndef _JPP_L1_Z1_MOD_H
#define _JPP_L1_Z1_MOD_H

#include <stdint.h>

/*
 * computes the factorial of n
 * only works on natural numbers
 */
uint64_t factorial(uint64_t n);

/*
 * computes the gcd of a and b
 * only works on natural numbers
 */
uint64_t gcd(uint64_t a, uint64_t b);

/*
 * the solution of a linear diophantine equation 
 */
typedef struct {
    int64_t n;
    int64_t m;
} Result;

/*
 * computes the solution of a linear diophantine equation ax + by = c
 * or returns NULL if it doesn't exist
 */
Result *diophantine(int64_t a, int64_t b, int64_t c);

#endif // _JPP_L1_Z1_MOD_H