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  1. #include <iostream>
  2. #include <fstream>
  3. #include <string>
  4. using namespace std;
  5.  
  6. void word_to_bool(string word, bool letters[]) {
  7.     for (char c : word) {
  8.         if (isalpha(c)) {
  9.             letters[tolower(c) - 'a'] = true;
  10.         }
  11.     }
  12. }
  13.  
  14. int count_letters(bool letters[]) {
  15.     int count = 0;
  16.     for (int i = 0; i < 26; i++) {
  17.         if (letters[i]) {
  18.             count++;
  19.         }
  20.     }
  21.     return count;
  22. }
  23.  
  24. int main() {
  25.    // freopen("input.txt", "r", stdin);
  26.    // freopen("output.txt", "w", stdout);
  27.     bool max_letters[26] = {0};
  28.     int max_count = 0;
  29.     string max_words = "";
  30.     string line;
  31.     if (line == "") {
  32.         cout << "NULL\n";
  33.         return 0;
  34.     }
  35.     while (getline(cin, line)) {
  36.         int start = 0;
  37.         for (int i = 0; i <= line.size(); i++) {
  38.             if (i == line.size() || ispunct(line[i]) || isspace(line[i])) {
  39.                 string word = line.substr(start, i - start);
  40.                 bool letters[26] = {0};
  41.                 word_to_bool(word, letters);
  42.                 int count = count_letters(letters);
  43.                 if (count > max_count) {
  44.                     max_count = count;
  45.                     max_words = word;
  46.                 }
  47.                 else if (count == max_count) {
  48.                     max_words += " " + word;
  49.                 }
  50.                 start = i + 1;
  51.             }
  52.         }
  53.     }
  54.     if (max_count == 0) {
  55.         cout << "-1\n";
  56.     }
  57.  
  58.     else {
  59.         cout << max_words << "\n";
  60.     }
  61.     return 0;
  62. }
  63.  
  64.  
  65.  
  66.  
  67.  
  68.  
  69.  
Success #stdin #stdout 0.01s 5312KB
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stdin
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Standard input is empty
stdout
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NULL
https://ideone.com/lghjPd
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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