Introduction to Sets in Python - HackerRank Solution
Problem :
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.
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:
Input Format :
The second line contains the N space separated heights of the plants.
Constraints :
- 0 < N <= 100
Output Format :
Output the average height value on a single line.
Sample Input :
10 161 182 161 154 176 170 167 171 170 174
Sample Output :
169.375
Explanation :
Solution :-
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | # Introduction to Sets in Python - Hacker Rank 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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