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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. bool cr(const char *p, char c = 0) {
  5. 	return *p && (*p == c || cr(p + 1, c) || cr(p + 1, *p));
  6. }
  7.  
  8. int main()
  9. {
  10.     std::cout << cr("") << std::endl      // 0
  11.         << cr("a") << std::endl           // 0
  12.         << cr("aa") << std::endl          // 1
  13.         << cr("abc") << std::endl         // 0
  14.         << cr("aaa") << std::endl         // 1
  15.         << cr("bab") << std::endl         // 1
  16.         << cr("baab") << std::endl        // 1
  17.         << cr("bbaaabb") << std::endl     // 1
  18.         << cr("bbabc") << std::endl       // 1
  19.         << cr("abcbb") << std::endl;      // 1
  20.  
  21.     return EXIT_SUCCESS;
  22. }
Success #stdin #stdout 0s 4272KB
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https://ideone.com/ONM3RC
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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