Hello Programmers/Coders, Today we are going to share solutions of Programming problems of HackerRank of Programming Language Python. At Each Problem with Successful submission with all Test Cases Passed, you will get an score or marks. And after solving maximum problems, you will be getting stars. This will highlight your profile to the recruiters.
In this post, you will find the solution for Introduction to Sets 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 – Introduction to Sets in Python – HackerRank Solution
Introduction to Sets in Python – HackerRank Solution
A set is an unordered collection of elements without duplicate entries.
When printed, iterated or converted into a sequence, its elements will appear in an arbitrary order.
Example
>>> print set()
set([])
>>> print set('HackerRank')
set(['a', 'c', 'e', 'H', 'k', 'n', 'r', 'R'])
>>> print set([1,2,1,2,3,4,5,6,0,9,12,22,3])
set([0, 1, 2, 3, 4, 5, 6, 9, 12, 22])
>>> print set((1,2,3,4,5,5))
set([1, 2, 3, 4, 5])
>>> print set(set(['H','a','c','k','e','r','r','a','n','k']))
set(['a', 'c', 'r', 'e', 'H', 'k', 'n'])
>>> print set({'Hacker' : 'DOSHI', 'Rank' : 616 })
set(['Hacker', 'Rank'])
>>> print set(enumerate(['H','a','c','k','e','r','r','a','n','k']))
set([(6, 'r'), (7, 'a'), (3, 'k'), (4, 'e'), (5, 'r'), (9, 'k'), (2, 'c'), (0, 'H'), (1, 'a'), (8, 'n')])
Basically, sets are used for membership testing and eliminating duplicate entries.
Task
Now, let’s use our knowledge of sets and help Mickey.
Ms. Gabriel Williams is a botany professor at District College. One day, she asked her student Mickey to compute the average of all the plants with distinct heights in her greenhouse.
Formula used:
Function Description
Complete the average function in the editor below.
average has the following parameters:
- int arr: an array of integers
Returns
- float: the resulting float value rounded to 3 places after the decimal
Input Format
The first line contains the integer, , the size of .
The second line contains the space-separated integers, .
Constraints
Sample Input
STDIN Function ----- -------- 10 arr[] size N = 10 161 182 161 154 176 170 167 171 170 174 arr = [161, 181, ..., 174]
Sample Output
169.375
Explanation
Here, set ([154, 161, 167, 170, 171, 174, 176, 182]) is the set containing the distinct heights. Using the sum() and len() functions, we can compute the average.
Introduction to Sets in Python – HackerRank Solution
def average(array):
# Introduction to Sets in Python - Hacker Rank Solution START
sum_array = sum(set(array))
len_array = len(set(array))
output = sum_array/len_array
return output;
# Introduction to Sets in Python - Hacker Rank Solution END
if __name__ == '__main__':
n = int(input())
arr = list(map(int, input().split()))
result = average(arr)
print(result)
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