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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {string s;
  7. bool x=0,y=0;
  8. cin>>s;
  9. for(int i=0;i<s.length();i++){
  10.     if(s[i]=='A'&&s[i+1]=='B'){
  11.         x=1;
  12.         if(s[i+2]=='A')
  13.         i+=3;
  14.     }
  15.     if(s[i]=='B'&&s[i+1]=='A'){
  16.         y=1;
  17.         if(s[i+2]=='B')
  18.         i+=3;
  19.     }}
  20.     if(x&&y)
  21.     cout<<"YES";
  22.     else
  23.     cout<<"NO";
  24.     return 0;
  25. }
Success #stdin #stdout 0s 5464KB
comments (?)
stdin
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BAAB
stdout
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YES
https://ideone.com/IEt0m8
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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