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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	string s;cin>>s;
  7. 	int i=0;
  8. 	int j=s.size()-1;
  9. 	int maxx=0;
  10. 	while(i<=j){
  11. 		if(s[i]!=s[j]){
  12. 			j=s.size();
  13. 		}else{
  14. 			maxx=max(maxx,j-i+1);
  15. 		}
  16. 		i++,j--;
  17. 	}
  18. 	cout<<maxx<<"\n";
  19. 	return 0;
  20. }
Success #stdin #stdout 0.01s 5548KB
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https://ideone.com/R6j9iB
language:
C++14 (gcc 8.3)
created:
333 days ago
visibility:
public

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