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  1.  
  2. #include <bits/stdc++.h>
  3.  
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8.     int t;
  9.     cin>>t;
  10.  
  11.     while(t--)
  12.     {
  13.         string a;
  14.         cin>>a;
  15.  
  16.         stack<int> smalls, capitals;
  17.         unordered_map<int, bool> deleted;
  18.  
  19.         for(int i{}; i<a.size(); i++)
  20.         {
  21.             if(a[i] == 'b')
  22.             {
  23.                 deleted[i] = true;
  24.  
  25.                 if(!smalls.empty())
  26.                 {
  27.                     deleted[smalls.top()] = true;
  28.                     smalls.pop();
  29.                 }
  30.             }
  31.  
  32.             else if(a[i] == 'B')
  33.             {
  34.                 deleted[i] = true;
  35.  
  36.                 if(!capitals.empty())
  37.                 {
  38.                     deleted[capitals.top()] = true;
  39.                     capitals.pop();
  40.                 }
  41.             }
  42.  
  43.             else if('a' <= a[i] && a[i] <= 'z')
  44.             {
  45.                 smalls.push(i);
  46.             }
  47.  
  48.             else if('A' <= a[i] && a[i] <= 'Z')
  49.             {
  50.                 capitals.push(i);
  51.             }
  52.         }
  53.  
  54.         for(int i{}; i < a.size(); i++)
  55.         {
  56.             if(!deleted[i])
  57.                 cout<<a[i];
  58.         }
  59.  
  60.         cout<<endl;
  61.     }
  62.  
  63.     return 0;
  64. }
Success #stdin #stdout 0s 5312KB
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stdin
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12
ARaBbbitBaby
YetAnotherBrokenKeyboard
Bubble
Improbable
abbreviable
BbBB
BusyasaBeeinaBedofBloomingBlossoms
CoDEBARbIES
codeforces
bobebobbes
b
TheBBlackbboard
stdout
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ity
YetnotherrokenKeoard
le
Imprle
revile

usyasaeeinaedofloominglossoms
CDARIES
codeforces
es

helaoard
https://ideone.com/AErIlf
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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