Longest Fresh Melody
`notes` is a sequence of musical notes (represented as numbers or strings). A "fresh melody" is a CONTIGUOUS stretch of the sequence in which no note repeats. Find the length of the longest fresh melody in the sequence.
`notes` is a sequence of musical notes (represented as numbers or strings). A "fresh melody" is a CONTIGUOUS stretch of the sequence in which no note repeats. Find the length of the longest fresh melody in the sequence.
