MIN_TIME
#define MIN_HOUR (MIN_TIME / HOUR)
#define MIN_MIN (MIN_TIME / 60)
#define SUM_OK(a, b) (((a) > 0) ? ( (b) <= MAX_TIME - (a)) : (MIN_TIME - (a) <= (b)))
#define MIN_DAY (MIN_TIME / DAY)
#define SUM_OK(a, b) (((a) > 0) ? ( (b) <= MAX_TIME - (a)) : (MIN_TIME - (a) <= (b)))
#define MIN_DAY (MIN_TIME / DAY)
#define MIN_HOUR (MIN_TIME / HOUR)
#define MIN_MIN (MIN_TIME / 60)