How many movies have Ira Levin and Mac Hyman collaborated on?

They have worked on 3 movies together! Their first movie together was No Time for Sergeants (1955) while their highest rated movie together was No Time for Sergeants (1958). They have not worked together since Není doba pro zupáky aneb Patálie seržanta Kinga (1963). They are most known for their comedy films together.