Problem 1 (Problem 22, text book, chapter 9, page 479)

Write a function that takes as an argument an unordered list of integers and return dictionary of the three integers with the highest count and their counts. That is, key is integer; value is its count. In case of a tie, either value can be returned.


Problem 2
Write a function that takes a dictionary and an integer as arguments and return all keys of the dictionary whose values equal to the integer.