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  1. import java.io.BufferedReader;
  2. import java.io.IOException;
  3. import java.io.InputStreamReader;
  4. import java.util.Set;
  5. import java.util.TreeSet;
  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.         while (reader.ready()) {
  14.             StringBuilder currentWord = new StringBuilder();
  15.             boolean wasLetter = false;
  16.             String currentLine = reader.readLine();
  17.             int lengthLine = currentLine.length();
  18.             for (int i = 0; i < lengthLine; ++i) {
  19.                 if (isLetter(currentLine.charAt(i))) {
  20.                     currentWord.append(currentLine.charAt(i));
  21.                     wasLetter = true;
  22.                 } else if (wasLetter) {
  23.                     uniqueWords.add(currentWord.toString());
  24.                     currentWord = new StringBuilder();
  25.                     wasLetter = false;
  26.                 }
  27.             }
  28.             if (currentWord.length() != 0) {
  29.                 uniqueWords.add(currentWord.toString());
  30.             }
  31.         }
  32.     }
  33.  
  34.     public static void main(String[] args) throws IOException {
  35.         BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
  36.         Set<String> uniqueWords = new TreeSet<>();
  37.         parseToWords(reader, uniqueWords);
  38.         System.out.println(uniqueWords.size());
  39.     }
  40. }
Success #stdin #stdout 0.09s 55016KB
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https://ideone.com/s1xNec
language:
Java (HotSpot 12)
created:
13 days ago
visibility:
public

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