It's A Raggy Waltz.

David Warren Brubeck (born December 6, 1920 in Concord, California), better known as Dave Brubeck, is a US jazz pianist. Regarded as a genius in his field, he has written a number of jazz standards, including "It's a Raggy Waltz". Brubeck's style ranges from refined to bombastic, reflecting his mother's attempts at classical training, and his improvisational skills. Much of his music employs unusual time signatures.