[leetCode] 884. Uncommon Words from Two Sentences (Python)

We are given two sentences A and B.  (A sentence is a string of space separated words.  Each word consists only of lowercase letters.)

A word is uncommon if it appears exactly once in one of the sentences, and does not appear in the other sentence.

Return a list of all uncommon words. 

You may return the list in any order.

 

Example 1:

Input: A = "this apple is sweet", B = "this apple is sour"
Output: ["sweet","sour"]

Example 2:

Input: A = "apple apple", B = "banana"
Output: ["banana"]

Note:

1. 0 <= A.length <= 200
2. 0 <= B.length <= 200
3. A and B both contain only spaces and lowercase letters.

Solution

from collections import Counter

class Solution:
    def uncommonFromSentences(self, A: str, B: str) -> List[str]:
        array = A.split(" ") + B.split(" ")
        
        cnt = list(Counter(array).items())
        
        answer = [item[0] for item in cnt if item[1] == 1]
        
        return answer

 

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