LeetCode 804: Unique Morse Code Words Solution
Master LeetCode problem 804 (Unique Morse Code Words), 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.
804. Unique Morse Code Words
Problem Explanation
Explanation:
- We are given a list of words and we need to find the number of different transformations possible for these words based on their Morse code representations.
- We will create a set to store unique transformations of words by converting each word to its Morse code representation.
- We will iterate over each word, convert it to Morse code, and add the transformation to the set.
- Finally, we return the size of the set which gives us the count of unique transformations.
Time Complexity: O(n*m), where n is the number of words and m is the average length of a word. Space Complexity: O(n) for storing unique transformations.
:
Solution Code
class Solution {
public int uniqueMorseRepresentations(String[] words) {
String[] morseCodes = {".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."};
Set<String> transformations = new HashSet<>();
for (String word : words) {
StringBuilder sb = new StringBuilder();
for (char c : word.toCharArray()) {
sb.append(morseCodes[c - 'a']);
}
transformations.add(sb.toString());
}
return transformations.size();
}
}Try It Yourself
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