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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <deque>
  4. using namespace std;
  5. const int sz = 1000 + 4 ;
  6. int q , x ;
  7. string s ;
  8. deque<int> dq ;
  9. bool ok ;
  10. int main() {
  11.     cin>>q ;
  12.     while(q--)
  13.     {
  14.         cin>>s;
  15.         if(s == "toFront")
  16.         {
  17.             cin>>x ;
  18.             if(ok ==1)
  19.                 dq.push_back(x) ;
  20.             else
  21.                 dq.push_front(x) ;
  22.         }
  23.         else if(s == "push_back")
  24.         {
  25.             cin>>x ;
  26.             if(ok ==1)
  27.                 dq.push_front(x) ;
  28.             else
  29.                 dq.push_back(x) ;
  30.         }
  31.         else if(s == "front")
  32.         {
  33.             if(dq.empty())
  34.             {
  35.                 cout<<"No job for Ada?\n" ;
  36.             }
  37.             else
  38.             {
  39.                 if(ok == 1)
  40.                 {
  41.                     cout<<dq.back()<<'\n';
  42.                     dq.pop_back();
  43.                 }
  44.                 else
  45.                 {
  46.                     cout<<dq.front()<<'\n';
  47.                     dq.pop_front();
  48.                 }
  49.             }
  50.         }
  51.         else if(s == "back")
  52.         {
  53.             if(dq.empty())
  54.             {
  55.                 cout<<"No job for Ada?\n" ;
  56.             }
  57.             else
  58.             {
  59.                 if(ok == 1)
  60.                 {
  61.                     cout<<dq.front()<<'\n';
  62.                     dq.pop_front();
  63.                 }
  64.                 else
  65.                 {
  66.                     cout<<dq.back()<<'\n';
  67.                     dq.pop_back();
  68.                 }
  69.             }
  70.         }
  71.         else
  72.         {
  73.             ///reverse(dq.begin() , dq.end()) ;
  74.             if(ok == 0)
  75.                 ok = 1 ;
  76.             else
  77.                 ok = 0 ;
  78.         }
  79.     }
  80.  
  81.     return 0;
  82. }
Success #stdin #stdout 0.01s 5384KB
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stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/dxfswi
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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