Lutosławski started piano lessons in Warsaw for two years from the age of six. After the Polish-Soviet War the family left Warsaw to return to Drozdowo, but after a few years of running the estates with limited success, his mother returned to Warsaw. She worked as a physician, and translated books for children from English. In 1924 Lutosławski entered secondary school (Stefan Batory Gymnasium) while continuing piano lessons. A performance of Karol Szymanowski's "Third Symphony" deeply affected him. In 1925 he started violin lessons at the Warsaw Music School. In 1931 he enrolled at Warsaw University to study mathematics, and in 1932 he formally joined the composition classes at the Conservatory. His only composition teacher was Witold Maliszewski, a renowned Polish composer who had been a pupil of Nikolai Rimsky-Korsakov. Lutosławski was given a strong grounding in musical structures, particularly movements in sonata form. In 1932 he gave up the violin, and in 1933 he discontinued his mathematics studies to concentrate on the piano and composition. As a student of Jerzy Lefeld, he gained a diploma for piano performance from the Conservatory in 1936, after presenting a virtuoso program including Schumann's "Toccata" and Beethoven's fourth piano concerto. His diploma for composition was awarded by the same institution in 1937.