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  1. #include <iostream>
  2. #include <string>
  3. #include <unordered_set>
  4. using namespace std;
  5. int main() {
  6.     ios_base::sync_with_stdio(false);
  7.     cin.tie(NULL);
  8.     int n;
  9.     cin >> n;
  10.     unordered_set<string> skup_sekvenci;
  11.     string operacija, niska;
  12.     for (int i = 0; i < n; ++i) {
  13.         cin >> operacija >> niska;
  14.         if (operacija == "ubaci") {
  15.             skup_sekvenci.insert(niska);
  16.         } else if (operacija == "izbaci") {
  17.             skup_sekvenci.erase(niska);
  18.         } else if (operacija == "trazi") {
  19.             if (skup_sekvenci.find(niska) != skup_sekvenci.end()) {
  20.                 cout << "da\n";
  21.             } else {
  22.                 cout << "ne\n";
  23.             }
  24.         }
  25.     }
  26.     return 0;
  27. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/B5tDbw
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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