HackerRank No Idea! problem solution in Python | python question solution

August 30, 2022 blogTech

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There is an array of integers. There are also disjoint sets, and , each containing integers. You like all the integers in set and dislike all the integers in set . Your initial happiness is . For each integer in the array, if , you add to your happiness. If , you add to your happiness. Otherwise, your happiness does not change. Output your final happiness at the end.

Note: Since and are sets, they have no repeated elements. However, the array might contain duplicate elements.

Constraints

Input Format

The first line contains integers  and  separated by a space.
The second line contains  integers, the elements of the array.
The third and fourth lines contain  integers,  and , respectively.

Output Format

Output a single integer, your total happiness.

Sample Input

Sample Output

Explanation

You gain unit of happiness for elements and in set . You lose unit for in set . The element in set does not exist in the array so it is not included in the calculation.

Hence, the total happiness is .

Problem solution in Python 2 programming.

import sys

def main():
    h = Happiness()
    input = get_input()
    m = input["m"]
    n = input["n"]
    n_array = input["n_array"]
    A_set = input["A_set"]
    B_set = input["B_set"]
    for num in n_array:
        if num in A_set:
            h.incr()
        elif num in B_set:
            h.decr()
    print h.val

class Happiness():
    def __init__(self):
        self.val = 0
    def incr(self):
        self.val += 1
    def decr(self):
        self.val -= 1

def get_input():
        input_m_n = sys.stdin.readline().strip()
        input_n_array = sys.stdin.readline().strip()
        input_A_set = sys.stdin.readline().strip()
        input_B_set = sys.stdin.readline().strip()
        m, n = input_m_n.split(' ')
        n_array = input_n_array.split(' ')
        A_set = set(input_A_set.split(' '))
        B_set = set(input_B_set.split(' '))
        result = {"m":m, "n":n, "n_array": n_array, "A_set": A_set, "B_set": B_set}
        return result

if __name__ == '__main__':
    main()

Problem solution in Python 3 programming.

# Enter your code here. Read input from STDIN. Print output to STDOUT
n, m = input().split()

sc_ar = input().split()

A = set(input().split())
B = set(input().split())
print(sum([(i in A) - (i in B) for i in sc_ar]))

Problem solution in pypy programming.

# Enter your code here. Read input from STDIN. Print output to STDOUT
n, m = raw_input().split()

arr = raw_input().split()

A = set(raw_input().split())
B = set(raw_input().split())
print sum([(i in A) - (i in B) for i in arr])

Problem solution in pypy3 programming.

# Enter your code here. Read input from STDIN. Print output to STDOUT
numlst =input().split()
l = input().split()
A = set(input().split())
B = set(input().split())
print(len(list(filter(lambda x: x in A, l))) - len(list(filter(lambda x: x in B, l))))

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