LeetCode 2942: Find Words Containing Character Solution

Master LeetCode problem 2942 (Find Words Containing Character), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

2942. Find Words Containing Character

Easy

Array String

Problem Explanation

Explanation:

To solve this problem, we iterate through each word in the given array and check if the character x is present in that word. If the character is found, we add the index of that word to the result array. Finally, we return the result array containing the indices of words that contain the character x.

Initialize an empty array result to store the indices of words containing character x.
Iterate through each word in the input array words.
For each word, check if the character x is present in that word.
If x is found in the word, add the index of that word to the result array.
Return the result array containing the indices of words that contain the character x.

Time Complexity: O(n*m) where n is the number of words and m is the average length of words in the input array.

Space Complexity: O(n) where n is the number of words in the input array.

: :

Solution Code

import java.util.ArrayList;
import java.util.List;

class Solution {
    public int[] findWordsContainingChar(String[] words, char x) {
        List<Integer> result = new ArrayList<>();
        
        for (int i = 0; i < words.length; i++) {
            if (words[i].contains(String.valueOf(x))) {
                result.add(i);
            }
        }
        
        return result.stream().mapToInt(Integer::intValue).toArray();
    }
}

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