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  1. #include <bits/stdc++.h>
  2. #define IOS  ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
  3. #define ll long long
  4. #define ss string
  5. #define db double
  6. #define endl '\n'
  7. #define pi 3.1415927
  8. #define outd fixed <<  setprecision(6)
  9. #define all(x) (x).begin(), (x).end()
  10. #define rall(x) (x).rbegin(), (x).rend()
  11. using namespace  std;
  12. const int N=1e6;
  13. int main() {
  14.     IOS
  15.     deque<int> dq;
  16.     int q;
  17.     cin>>q;
  18.     while(q--) {
  19.         ss s;
  20.         cin>>s;
  21.         if(s=="toFront") {
  22.             int x; cin>>x;
  23.             dq.push_front(x);
  24.         }
  25.          else if(s=="push_back") {
  26.             int x; cin>>x;
  27.             dq.push_back(x);
  28.         }
  29.        else if(s=="front") {
  30.             if(dq.empty()) {
  31.                 cout<<"No job for Ada?\n";
  32.             }
  33.             else {
  34.             cout<<dq.front()<<endl;
  35.             }
  36.         }
  37.       else if(s=="back") {
  38.             if(dq.empty()) {
  39.                 cout<<"No job for Ada?\n";
  40.             }
  41.             else {
  42.             cout<<dq.back()<<endl;
  43.             }
  44.         }
  45.        else if(s=="reverse") {
  46.             reverse(all(dq));
  47.         }
  48.     }
  49.     return 0;
  50. }
  51.  
  52.  
Success #stdin #stdout 0s 5264KB
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https://ideone.com/cIj5J5
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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