int8_t get_opponent_da(int16_t *d, int16_t *a);
int8_t get_opponent_xyda(int16_t *x, int16_t *y, int16_t *d, int16_t *a);
uint8_t opponent_is_behind(void);
int8_t get_opponent_da(int16_t *d, int16_t *a);
int8_t get_opponent_xyda(int16_t *x, int16_t *y, int16_t *d, int16_t *a);
uint8_t opponent_is_behind(void);