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  1. /*
  2. ==> Don't stop when you're tired, stop when you're done.
  3. ==> From the river to the sea, Palestine will be free.
  4. --> @author: MIDORIYA_
  5. */
  6. //*==============================================================
  7. #include <bits/stdc++.h>
  8. using namespace std;
  9. typedef long long ll;
  10. typedef double db;
  11. typedef long double ld;
  12. typedef pair<int, int> pii;
  13. typedef pair<ll, ll> pll;
  14. typedef vector<int> vi;
  15. typedef vector<ll> vll;
  16. typedef vector<db> vd;
  17. typedef vector<ld> vld;
  18. typedef vector<bool> vb;
  19. typedef vector<vector<ll>> vvl;
  20. typedef vector<vector<int>> vvi;
  21. typedef vector<pii> vii;
  22. typedef set<int> si;
  23. typedef set<ll> sl;
  24. #define pb push_back
  25. #define all(x) x.begin(), x.end()
  26. #define rall(x) x.rbegin(), x.rend()
  27. #define endl "\n"
  28. const int MOD = 998244353, mod = 1e9 + 7, maxA = 1e5 + 5;
  29. #define time cerr << "Time Taken: " << (float)clock() / CLOCKS_PER_SEC << " Secs";
  30. //*===================>>>Fast-IO-Functions<<<=================
  31. void fastIO()
  32. {
  33.     ios_base::sync_with_stdio(false);
  34.     cin.tie(nullptr);
  35.     cout.tie(nullptr);
  36. }
  37. //*===================>>>File-IO-Functions<<<=================
  38. void fileIO()
  39. {
  40. #ifndef ONLINE_JUDGE
  41.     freopen("in.txt", "r", stdin);
  42.     freopen("out.txt", "w", stdout);
  43. #endif
  44. }
  45. //*===================>>>ONE-FOR-ALL-Function<<<==============
  46. void OneForAll()
  47. {
  48.     int op;
  49.     cin >> op;
  50.  
  51.     static queue<ll> arr;
  52.     if(op == 1)
  53.     {
  54.         ll n;
  55.         cin >> n;
  56.         arr.push(n);
  57.     }
  58.     else if(op == 2)
  59.     {
  60.         if(!arr.empty())
  61.         {
  62.             arr.pop();
  63.         }
  64.     }
  65.     else
  66.     {
  67.         if(!arr.empty())
  68.         {
  69.             cout << arr.front() << endl;
  70.         }
  71.         else
  72.         {
  73.             cout << "Empty!" << endl;
  74.         }
  75.     }
  76. }
  77.  
  78. int main()
  79. {
  80.     fastIO();
  81.     fileIO();
  82.  
  83.     ll tc = 1, t = 1;
  84.     cin >> t;
  85.     while (t--)
  86.     {
  87.         // cout << "Case " << tc++ << ": ";
  88.         OneForAll();
  89.     }
  90.     time;
  91.     return 0;
  92. }
Success #stdin #stdout #stderr 0s 5308KB
comments (?)
stdin
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Standard input is empty
stdout
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Empty!
stderr
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Time Taken: 0.004336 Secs
https://ideone.com/KLHem4
problem QUEUEEZ, based on SPOJ submission 35533289 (CPP14), 2026-02-12 17:07:00
language:
C++14 (gcc 8.3)
created:
12 hours ago
visibility:
public

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