10 Top TV APIs

Television entertainment isn't what it used to be. These days, viewers have endless channels, networks, streaming platforms, cable platforms, and even devices to choose how, where, and when to watch their favorite TV shows. Reigning in all these choices in a concise, easy to use application is a hefty endeavor and one that most TV providers have not been all that successful at doing.

Question about data structures

Given two arrays (the first array and the second array) of the
same size, each consisting of n positive integers, write a
program to determine how many unique integers the second
array has. Here a unique integer means that it shows only once
in the second array but does not show in the first array. For
example, if the first array is [1, 5, 3, 6, 8] and the second array is
[2, 4, 2, 5, 9] (with n=5), the second array has two unique
integers (4 and 9). What is the complexity of the program?