HackerRank Python - Set Difference Operation


.difference()
The tool .difference() returns a set with all the elements from the set that are not in an iterable.
Sometimes the - operator is used in place of the .difference() tool, but it only operates on the set of elements in set.
Set is immutable to the .difference() operation (or the - 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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