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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. void createFrq(int frq[], string word) {
  5.     for (int i = 0; i < (int)word.size(); ++i) {
  6.         if (word[i] >= 'A' && word[i] <= 'Z') {
  7.             word[i] += 32;
  8.         }
  9.         ++frq[word[i]];
  10.     }
  11. }
  12.  
  13. bool isValid(int frq[]) {
  14.     int cnt = 0;
  15.     for (int i = 'a'; i <= 'z'; ++i) {
  16.         if (frq[i] > 0) {
  17.             ++cnt;
  18.         }
  19.     }
  20.     return cnt <= 2;
  21. }
  22.  
  23. int main() {
  24.     string text;
  25.     int cntValid = 0;
  26.     while (getline(cin, text)) {
  27.         string currWord = "";
  28.         for (int i = 0; i <= (int)text.size(); ++i) {
  29.             if (isalpha(text[i])) {
  30.                 currWord += text[i];
  31.             } else if (!text.empty()) {
  32.                 int frqWord['z' + 1] = {0};
  33.                 createFrq(frqWord, currWord);
  34.                 if (isValid(frqWord)) {
  35.                     ++cntValid;
  36.                 }
  37.                 currWord = "";
  38.             }
  39.         }
  40.     }
  41.     cout << cntValid;
  42.     return 0;
  43. }
  44.  
Success #stdin #stdout 0.01s 5300KB
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https://ideone.com/RFyzjY
language:
C++ (gcc 8.3)
created:
6 hours ago
visibility:
public

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