Among the users whose fan is medium, how many users received high compliments from other users.
is medium refers to user_fans = 'Medium'; high compliments refers to number_of_compliments = 'High'
SELECT COUNT(T1.user_id) FROM Users AS T1 INNER JOIN Users_Compliments AS T2 ON T1.user_id = T2.user_id WHERE T2.number_of_compliments = 'High' AND T1.user_fans = 'Medium'