Summary from Wikipedia

Crnjanski was born in Csongrád (modern-day Hungary), to an impoverished family which moved in 1896 to Temesvár (modern-day Timișoara, Romania). He completed the elementary school in Pancsova (today Pančevo, Serbia), and Grammar school in Temesvár. Then he started attending the export academy in Fiume (today Rijeka, Croatia) in 1912, and in the autumn of the following year he started studying mathematics and philosophy in Vienna.