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  1. import java.io.IOException;
  2. import java.io.InputStreamReader;
  3. import java.util.Set;
  4. import java.util.TreeSet;
  5. import java.io.BufferedReader;
  6.  
  7. public class Main {
  8.     private static boolean isLetter(char c) {
  9.         return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z');
  10.     }
  11.  
  12.     private static void parseToWords(BufferedReader reader, Set<String> uniqueWords) throws IOException {
  13.         StringBuilder currentWord = new StringBuilder();
  14.         boolean wasLetter = false;
  15.         while (reader.ready()) {
  16.             char c = (char)reader.read();
  17.             if (isLetter(c)) {
  18.                 currentWord.append(c);
  19.                 wasLetter = true;
  20.             } else if (wasLetter) {
  21.                 uniqueWords.add(currentWord.toString());
  22.                 currentWord = new StringBuilder();
  23.                 wasLetter = false;
  24.             }
  25.         }
  26.         if (currentWord.length() != 0) {
  27.             uniqueWords.add(currentWord.toString());
  28.         }
  29.     }
  30.  
  31.     public static void main(String[] args) throws IOException {
  32.         BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
  33.         Set<String> uniqueWords = new TreeSet<>();
  34.         parseToWords(reader, uniqueWords);
  35.         for (String currentWord : uniqueWords) {
  36.             System.out.println(currentWord);
  37.         }
  38.     }
  39. }
Success #stdin #stdout 0.07s 54816KB
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https://ideone.com/G3spQv
language:
Java (HotSpot 12)
created:
221 days ago
visibility:
public

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