## HackerRank No Idea! Solution

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**

```
3 2
1 5 3
3 1
5 7
```

```
1
```

**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 .

## Solution in Python3

```
n,m = map(int,input().split())
N = list(map(int,input().split()))
A = set(map(int,input().split()))
B = set(map(int,input().split()))
#Union set A & B
C = A | B
#Exclude all numbers which doesn't exit in both A & B
N = (i for i in N if i in C)
#Add 1 if number is in set A else subtract 1
print(sum(1 if i in A else -1 for i in N ))
```