LeetCode804. 唯一摩尔斯密码词
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import java.util.TreeSet; class Solution { public int uniqueMorseRepresentations(String[] words) { String[] codes = {".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."}; TreeSet<String> set = new TreeSet<>(); for(String word: words){ StringBuilder res = new StringBuilder(); for(int i = 0; i < word.length(); i++){ res.append(codes[word.charAt(i) - \'a\']); } set.add(res.toString()); } return set.size(); } }
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