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![[English] LeetCode 920. Number of Music Playlists](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FQAUyCOUtSHM%2Fhq720.jpg%3Fsqp%3D-oaymwEXCNAFEJQDSFryq4qpAwkIARUAAIhCGAE%3D%26rs%3DAOn4CLAqcY3icGGEM0HZohUrxOt9EDT1Ew&w=256&q=75)
![[Chinese] LeetCode 920. Number of Music Playlists](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2Fh3iw4x2GPJI%2Fhq720.jpg%3Fsqp%3D-oaymwEXCNAFEJQDSFryq4qpAwkIARUAAIhCGAE%3D%26rs%3DAOn4CLB0yHnvaq4dxoyXiAgJVrFQo0njIQ&w=256&q=75)