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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main(){
  5.     int t;
  6.     cin >> t;
  7.     while(t--){
  8.         int z, osoby = 0;
  9.         cin >> z;
  10.         while(z--){
  11.             string czujnik;
  12.             cin >> czujnik;
  13.             if(czujnik == "AI") {
  14.                 osoby++;
  15.             }
  16.             else if(czujnik == "BI") {
  17.                 osoby++;
  18.             } 
  19.             else if(czujnik == "AO") {
  20.                 osoby--;
  21.             }  
  22.             else if(czujnik == "BO") {
  23.                 osoby--;
  24.             }
  25.             if(osoby < 0) {
  26.                 cout<<"ERROR";
  27.                 break;
  28.             }
  29.         }
  30.         cout << osoby;
  31.     }
  32. }
Success #stdin #stdout 0s 5380KB
comments (?)
stdin
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1
7
AI
BO
BI
BI
AO
AI
AO
stdout
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1
https://ideone.com/3gKopz
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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