In a reading room of a library, there are 22 reading spots. Each reading spot…

In a reading room of a library, there are 22 reading spots. Each reading spot consists of a round table with 9 chairs placed around it. Each table must have at least one reader, and the number of readers at each table must be unique. If there are 36 readers in total, how many reading spots will be left out without at least one reader?