struct long_num{
	int sigh; //-1 , +1
	int lengh;
	int *c;
	
};

struct long_num first (int a);
struct long_num summa_moduley (struct long_num A1, struct long_num A2);
struct long_num subtraction_moduley (struct long_num A1, struct long_num A2);
void output (struct long_num c);
struct long_num summa (struct long_num A1, struct long_num A2);
struct long_num subtraction (struct long_num A1, struct long_num A2);
struct long_num zeros (struct long_num B1, struct long_num B2);
struct long_num kara(struct long_num B1, struct long_num B2);
struct long_num powering (struct long_num A, int n);
struct long_num half_power (struct long_num X);
struct long_num half (struct long_num X);