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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. string f(string s) {
  5.  
  6. 	string rs = "";
  7.  
  8. 	int j = 1;
  9. 	int n = s.length();
  10.  
  11. 	for (int i=0;i<n;i++) {
  12. 		if (s[i] == s[j]) {
  13. 			j++;
  14. 			i--;
  15. 		} else {
  16. 			if (j - i > 1) {
  17. 				i = j - 1;
  18. 			} else {
  19. 				rs += s[i];
  20. 			}
  21. 		}
  22. 	}
  23.  
  24. 	return rs;
  25. }
  26.  
  27. int main() {
  28.  
  29. 	string s;
  30. 	cin>>s;
  31.  
  32. 	cout<<f(s)<<endl;
  33.  
  34. 	return 0;
  35. }
Success #stdin #stdout 0s 4508KB
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https://ideone.com/cl7jVH
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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