[Solved] Given a string array words, return an array of all characters that show up in all strings within the words (including duplicates). You may return the answer in any order.

Question

Given a string array words, return an array of all characters that show up in all strings within the words (including duplicates). You may return the answer in any order.

Example 1:

Input: words = ["bella","label","roller"]
Output: ["e","l","l"]

Example 2:

Input: words = ["cool","lock","cook"]
Output: ["c","o"]

Constraints:

  • 1 <= words.length <= 100
  • 1 <= words[i].length <= 100
  • words[i] consists of lowercase English letters.

Python Solution

from collections import Counter
class Solution:
    def commonChars(self, A: List[str]) -> List[str]:
        d=Counter(A[0])
        
        for a in A:
            d=d&Counter(a)
        
        return list(d.elements())
Abhishek Sharma
Abhishek Sharma

Started my Data Science journey in my 2nd year of college and since then continuously into it because of the magical powers of ML and continuously doing projects in almost every domain of AI like ML, DL, CV, NLP.

Articles: 520

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