Create 0804. Unique Morse Code Words

Author: haibarawu

0804. Unique Morse Code Words

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+/******************************
+804. Unique Morse Code Words
+International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, 
+as follows: "a" maps to ".-", "b" maps to "-...", "c" maps to "-.-.", and so on.
+For convenience, the full table for the 26 letters of the English alphabet is given below:
+[".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--",
+"-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."]
+Now, given a list of words, each word can be written as a concatenation of the Morse code of each letter. 
+For example, "cba" can be written as "-.-..--...", (which is the concatenation "-.-." + "-..." + ".-"). 
+We'll call such a concatenation, the transformation of a word.
+Return the number of different transformations among all words we have.
+
+Example:
+Input: words = ["gin", "zen", "gig", "msg"]
+Output: 2
+Explanation: 
+The transformation of each word is:
+"gin" -> "--...-."
+"zen" -> "--...-."
+"gig" -> "--...--."
+"msg" -> "--...--."
+There are 2 different transformations, "--...-." and "--...--.".
+
+Note:
+The length of words will be at most 100.
+Each words[i] will have length in range [1, 12].
+words[i] will only consist of lowercase letters.
+******************************/
+
+
+class Solution {
+    public int uniqueMorseRepresentations(String[] words) {
+        String [] morseCodes = {".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--",
+                                "-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."}; 
+         HashSet<String> set = new HashSet<>();
+        
+         for(String x : words) { 
+             String result = "";
+             
+             for(char c : x.toCharArray()) {
+                 result = result + morseCodes[c - 'a'];
+             }
+             
+             set.add(result);
+         }
+        
+         return set.size(); 
+    }
+}