A 54 y.o. man was admitted to the hospital with complaints of sudden intense headache in occipital region and vomiting. In the medical hystory: moderate arterial hypertension, the patient was taking hydrochlorothiazide. Three days ago he consulted a therapeutist about intense headache that was suppressed by an analgetic. Objectively: consciousness is confused, left pupil is mydriatic. Evident photophobia and tension of neck muscles. Left-side hemiparesis with increased muscle tonus and reflexes. Body temperature is low, rash is absent. AP-230/130 mm Hg, Ps- 50 bpm, BR- 12/min. What is your preliminary diagnosis?