Sergei Vasilievich Rachmaninoff ( Russian : Серге́й Васи́льевич Рахма́нинов ; Russian pronunciation : ( sʲɪrˈɡʲej rɐxˈmanʲɪnəf ) ; 1 April ( O.S. 20 March ) 1873 - 28 March 1943 ) was a Russian composer , pianist , and conductor .
Sergei Vasilievich Rachmaninoff ( Russian : Сергей Васильевич Рахманиновъ ) was a famous Russian composer and pianist .