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  1. #include <iostream>
  2. #include<bits/stdc++.h>
  3. #include<stack>
  4. #include<string.h>
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9.  
  10. long long T,i,counting;
  11.  
  12. cin>>T;
  13.  
  14. while(T--)
  15. {
  16.  
  17.     stack<char> s;
  18.     string arrow;
  19.  
  20.     cin>>arrow;
  21.  
  22.  
  23.     counting=0;
  24.  
  25. if(arrow[0] != '<')
  26.     {
  27.         cout<<0<<"\n";
  28.     }
  29.  
  30. else
  31. {
  32.     for(i=0;i<arrow.size();i++)
  33.     {
  34.  
  35.         if(arrow[i]=='<')
  36.         {
  37.             s.push(arrow[i]);
  38.         }
  39.         else if(arrow[i]=='>')
  40.         {
  41.             if(!s.empty())
  42.             {
  43.                 if(s.top()=='<')
  44.                 {
  45.                     s.pop();
  46.                     counting+=2;
  47.                 }
  48.             }
  49.  
  50.  
  51.  
  52.         }
  53.  
  54.     }
  55.     if(s.empty())
  56.     {
  57.         cout<<counting<<"\n";
  58.     }
  59.     else
  60.     {
  61.         cout<<0<<"\n";
  62.     }
  63. }
  64. }
  65. }
  66.  
Success #stdin #stdout 0s 16064KB
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Standard input is empty
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Standard output is empty
https://ideone.com/PBWVXW
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language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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