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  1. import java.io.BufferedReader;
  2. import java.io.IOException;
  3. import java.io.InputStreamReader;
  4. import java.util.Map;
  5. import java.util.HashMap;
  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 increaseFrequency(Map<String, Integer> words, String currentWord) {
  13.         if (words.containsKey(currentWord)) {
  14.             words.put(currentWord, words.get(currentWord) + 1);
  15.         } else {
  16.             words.put(currentWord, 1);
  17.         }
  18.     }
  19.  
  20.     private static boolean isMoreFrequent(StringBuilder currentWord, StringBuilder recurrentWord, int currentOcurance, int maxOcurance) {
  21.         return (currentOcurance > maxOcurance) || (currentOcurance == maxOcurance && (recurrentWord == null || recurrentWord.compareTo(currentWord) > 0));
  22.     }
  23.  
  24.     private static void updateRecurrentWord(StringBuilder recurrentWord, StringBuilder currentWord, int[] maxOcurance, int currentOcurance) {
  25.         if (isMoreFrequent(currentWord, recurrentWord, currentOcurance, maxOcurance[0])) {
  26.             recurrentWord.replace(0, recurrentWord.length(), currentWord.toString());
  27.             maxOcurance[0] = currentOcurance;
  28.         }
  29.     }
  30.  
  31.     public static String frequestWord(BufferedReader reader) {
  32.         Map<String, Integer> words = new HashMap<>();
  33.         StringBuilder recurrentWord = null;
  34.         int[] maxOcurance = new int[1];
  35.         try {
  36.             while (reader.ready()) {
  37.                 String currentLine = reader.readLine();
  38.                 StringBuilder currentWord = new StringBuilder();
  39.                 boolean wasLetter = false;
  40.                 int length = currentLine.length();
  41.                 for (int i = 0; i < length; ++i) {
  42.                     if (isLetter(currentLine.charAt(i))) {
  43.                         currentWord.append(currentLine.charAt(i));
  44.                         wasLetter = true;
  45.                     } else if (wasLetter) {
  46.                         increaseFrequency(words, currentWord.toString());
  47.                         updateRecurrentWord(recurrentWord, currentWord, maxOcurance, words.get(currentWord.toString()));
  48.                         currentWord = new StringBuilder();
  49.                         wasLetter = false;
  50.                     }
  51.                 }
  52.                 if (currentWord.length() > 0) {
  53.                     increaseFrequency(words, currentWord.toString());
  54.                     updateRecurrentWord(recurrentWord, currentWord, maxOcurance, words.get(currentWord.toString()));
  55.                 }
  56.             }
  57.             try {
  58.                 return recurrentWord.toString();
  59.             } catch (Exception e) {
  60.                 return "Nu ai introdus nici-un text.";
  61.             }
  62.         } catch (Exception e) {
  63.             return "Eroare la citirea textului.";
  64.         }
  65.     }
  66.  
  67.     public static void main(String[] args) {
  68.         BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
  69.         System.out.println(frequestWord(reader));
  70.     }
  71. }
Success #stdin #stdout 0.11s 52668KB
comments (?)
stdin
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Hello
stdout
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Eroare la citirea textului.
https://ideone.com/FyhNZI
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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