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  1. #include <iostream>
  2. #include <string>
  3. #include <map>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8.   int q;
  9.   cin >> q;
  10.  
  11.   map<string, string> country_to_capital;
  12.  
  13.   for (int i = 0; i < q; ++i) {
  14.     string operation_code;
  15.     cin >> operation_code;
  16.  
  17.     if (operation_code == "CHANGE_CAPITAL") {
  18.  
  19.       string country, new_capital;
  20.       cin >> country >> new_capital;
  21.       if (country_to_capital.count(country) == 0) {
  22.         cout << "Introduce new country " << country << " with capital " << new_capital << endl;
  23.       } else {
  24.         const string& old_capital = country_to_capital[country];
  25.         if (old_capital == new_capital) {
  26.           cout << "Country " << country << " hasn't changed its capital" << endl;
  27.         } else {
  28.           cout << "Country " << country << " has changed its capital from " << old_capital << " to " << new_capital << endl;
  29.         }
  30.       }
  31.       country_to_capital[country] = new_capital;
  32.  
  33.     } else if (operation_code == "RENAME") {
  34.  
  35.       string old_country_name, new_country_name;
  36.       cin >> old_country_name >> new_country_name;
  37.       if (old_country_name == new_country_name || country_to_capital.count(old_country_name) == 0 || country_to_capital.count(new_country_name) == 1) {
  38.         cout << "Incorrect rename, skip" << endl;
  39.       } else {
  40.         cout << "Country " << old_country_name << " with capital " << country_to_capital[old_country_name] <<
  41.             " has been renamed to " << new_country_name << endl;
  42.         country_to_capital[new_country_name] = country_to_capital[old_country_name];
  43.         country_to_capital.erase(old_country_name);
  44.       }
  45.  
  46.     } else if (operation_code == "ABOUT") {
  47.  
  48.       string country;
  49.       cin >> country;
  50.       if (country_to_capital.count(country) == 0) {
  51.         cout << "Country " << country << " doesn't exist" << endl;
  52.       } else {
  53.         cout << "Country " << country << " has capital " << country_to_capital[country] << endl;
  54.       }
  55.  
  56.     } else if (operation_code == "DUMP") {
  57.  
  58.       if (country_to_capital.empty()) {
  59.         cout << "There are no countries in the world" << endl;
  60.       } else {
  61.         for (const auto& country_item : country_to_capital) {
  62.           cout << country_item.first << "/" << country_item.second << " ";
  63.         }
  64.         cout << endl;
  65.       }
  66.  
  67.     }
  68.  
  69.   }
  70.  
  71.   return 0;
  72. }
  73.  
Success #stdin #stdout 0s 4440KB
comments (?)
stdin
copy 
6
CHANGE_CAPITAL RussianEmpire Petrograd
RENAME RussianEmpire RussianRepublic
ABOUT RussianRepublic
RENAME RussianRepublic USSR
CHANGE_CAPITAL USSR Moscow
DUMP
stdout
copy 
Introduce new country RussianEmpire with capital Petrograd
Country RussianEmpire with capital Petrograd has been renamed to RussianRepublic
Country RussianRepublic has capital Petrograd
Country RussianRepublic with capital Petrograd has been renamed to USSR
Country USSR has changed its capital from Petrograd to Moscow
USSR/Moscow
https://ideone.com/5oA5GG
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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