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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. const int MAX_SIZE = 2000;
  6. const int LAST_LETTER = 'Z';
  7. const int CASE_DIFFERENCE = 'a' - 'A';
  8.  
  9. bool isIntresting(int fr[]) {
  10.     for (int i = 'A'; i <= 'Z'; ++i) {
  11.         if (fr[i] == 2) {
  12.             return true;
  13.         }
  14.     }
  15.     return false;
  16. }
  17.  
  18. void reverseWord(char text[], int startPos, int lastPos) {
  19.     int halfPos = (lastPos + startPos - 1) / 2;
  20.     for (int i = startPos; i <= halfPos; ++i) {
  21.         char aux = text[i];
  22.         text[i] = text[lastPos + startPos - i];
  23.         text[lastPos + startPos - i] = aux;
  24.     }
  25. }
  26.  
  27. bool isLetter(char c) {
  28.     return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z');
  29. }
  30.  
  31. void resetToZero(int fr[]) {
  32.     for (int i = 'A'; i <= 'Z'; ++i) {
  33.         fr[i] = 0;
  34.     }
  35. }
  36.  
  37. void countFrequency(int fr[], int c) {
  38.     if ('A' <= c && c <= 'Z') {
  39.         ++fr[c];
  40.         return;
  41.     }
  42.     ++fr[c - CASE_DIFFERENCE];
  43. }
  44.  
  45. void transformText(char text[]) {
  46.     int length = strlen(text), fr[LAST_LETTER + 1] = {0};
  47.     int startPos = 0;
  48.     bool prevLetter = false;
  49.     for (int i = 0; i <= length; ++i) {
  50.         if (isLetter(text[i])) {
  51.             countFrequency(fr, text[i]);
  52.             prevLetter = true;
  53.         } else {
  54.             if (prevLetter) {
  55.             	if (isIntresting(fr)) {
  56.                 	reverseWord(text, startPos, i - 1);
  57.             	}
  58.                 resetToZero(fr);
  59.             }
  60.             prevLetter = false;
  61.             startPos = i + 1;
  62.         }
  63.  
  64.     }
  65. }
  66.  
  67. int main() {
  68.     char text[MAX_SIZE + 1];
  69.     while (cin.getline(text, MAX_SIZE + 1)) {
  70.         transformText(text);
  71.         cout << text << '\n';
  72.     }
  73.     return 0;
  74. }
Success #stdin #stdout 0s 5296KB
comments (?)
stdin
copy 
Aabbc-aabb!!!
ramar
sS
stdout
copy 
cbbaA-bbaa!!!
ramar
Ss
https://ideone.com/vFjOyo
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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