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In this post, you will find the solution for Set .difference() Operation in Python-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.
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Introduction To Python
Python is a widely-used, interpreted, object-oriented, and high-level programming language with dynamic semantics, used for general-purpose programming. It was created by Guido van Rossum, and first released on February 20, 1991.
Python is a computer programming language often used to build websites and software, automate tasks, and conduct data analysis. It is also used to create various machine learning algorithm, and helps in Artificial Intelligence. Python is a general purpose language, meaning it can be used to create a variety of different programs and isn’t specialized for any specific problems. This versatility, along with its beginner-friendliness, has made it one of the most-used programming languages today. A survey conducted by industry analyst firm RedMonk found that it was the most popular programming language among developers in 2020.
Link for the Problem – Set .difference() Operation in python – HackerRank Solution
Set .difference() Operation in python – HackerRank Solution
.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).
>>> s = set("Hacker")
>>> print s.difference("Rank")
set(['c', 'r', 'e', 'H'])
>>> print s.difference(set(['R', 'a', 'n', 'k']))
set(['c', 'r', 'e', 'H'])
>>> print s.difference(['R', 'a', 'n', 'k'])
set(['c', 'r', 'e', 'H'])
>>> print s.difference(enumerate(['R', 'a', 'n', 'k']))
set(['a', 'c', 'r', 'e', 'H', 'k'])
>>> print s.difference({"Rank":1})
set(['a', 'c', 'e', 'H', 'k', 'r'])
>>> s - set("Rank")
set(['H', 'c', 'r', 'e'])
Task
Students of District College have a subscription to English and French newspapers. Some students have subscribed to only the English newspaper, some have subscribed to only the French newspaper, and some have subscribed to both newspapers.
You are given two sets of student roll numbers. One set has subscribed to the English newspaper, and one set has subscribed to the French newspaper. Your task is to find the total number of students who have subscribed to only English newspapers.
Input Format
The first line contains the number of students who have subscribed to the English newspaper.
The second line contains the space separated list of student roll numbers who have subscribed to the English newspaper.
The third line contains the number of students who have subscribed to the French newspaper.
The fourth line contains the space separated list of student roll numbers who have subscribed to the French newspaper.
Constraints
Output Format
Output the total number of students who are subscribed to the English newspaper only.
Sample Input
9 1 2 3 4 5 6 7 8 9 9 10 1 2 3 11 21 55 6 8
Sample Output
4
Explanation
The roll numbers of students who only have English newspaper subscriptions are:
and .
Hence, the total is students.
Set .difference() Operation in python – HackerRank Solution
# Set .difference() Operation in python - Hacker Rank Solution # python3 # Enter your code here. Read input from STDIN. Print output to STDOUT # Set .difference() Operation in python - Hacker Rank Solution START N1 = int(input()) storage1 = set(input().split()) N2 = int(input()) storage2 = set(input().split()) storage3 = storage1.difference(storage2) print(len(storage3)) # Set .difference() Operation in python - Hacker Rank Solution END
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