HackerRank Python - Set Intersection Operation

.intersection()
The .intersection() operator returns the intersection of a set and the set of elements in an iterable.
Sometimes, the & operator is used in place of the .intersection() operator, but it only operates on the set of elements in set.
The set is immutable to the .intersection() operation (or & operation).

  1. # Enter your code here. Read input from STDIN. Print output to STDOUT

  2. 

  3. e = int(input())

  4. eng = set(map(int,input().split()))

  5. f = int(input())

  6. fre = set(map(int,input().split()))

  7. print(len(eng & fre))
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