#include <iostream>
#include <map>
using namespace std;

int main() {
  map<int, string> carModels;
  map<int, string> carBrands;
  map<int, float> carCapacities;
  map<int, float> carVelocities;

  cout << "==============================" << endl;
  cout << "CAR DATABASE" << endl;
  cout << "==============================" << endl;

  cout << "How many cars would you like to add?" << endl;
  int carAmount; cin >> carAmount;
  cout << "Cars to be added: " << carAmount << endl;

  for (int i = 1; i <= carAmount; i++) {

    cout << "------------------------------" << endl;
    cout << "Car " << i << ": Enter the MODEL" << endl;
    if (!(cin)) cin.clear();
    string model; cin >> model;

    cout << "------------------------------" << endl;
    cout << "Car " << i << ": Enter the BRAND" << endl;
    if (!(cin)) cin.clear();
    string brand; cin >> brand;

    cout << "------------------------------" << endl;
    cout << "Car " << i << ": Enter the CAPACITY" << endl;
    if (!(cin)) cin.clear();
    float capacity; cin >> capacity;

    cout << "------------------------------" << endl;
    cout << "Car " << i << ": Enter the VELOCITY" << endl;
    if (!(cin)) cin.clear();
    int velocity; cin >> velocity;

    cout << "------------------------------" << endl;

    carModels[i] = model;
    carBrands[i] = brand;
    carCapacities[i] = capacity;
    carVelocities[i] = velocity;
    cout << "Car " << i << ": "<< model  << ", " << brand << ", " << capacity << ", " << velocity << endl;
  }

  while (true) {
    cout << "------------------------------" << endl;
    cout << "Commands:" << endl;
    cout << "getmodel" << endl;
    cout << "getbrand" << endl;
    cout << "getcapacity" << endl;
    cout << "getvelocity" << endl;
    cout << "calccapacity" << endl;
    cout << "calcvelocity" << endl;
    cout << "------------------------------" << endl;
    string argument; cin >> argument;

    if (argument == "getmodel") {
      cout << "------------------------------" << endl;
      cout << "Please enter the Car ID" << endl;
      int carId; cin >> carId;
      if (carModels.find(carId) == carModels.end()) {
        cout << "Invalid Car ID" << endl;
        cout << "------------------------------" << endl;
        continue;
      }
      cout << "Result: " << carModels[carId] << endl;
      cout << "------------------------------" << endl;
    }

    if (argument == "getbrand") {
      cout << "------------------------------" << endl;
      cout << "Please enter the Car ID" << endl;
      int carId; cin >> carId;
      if (carBrands.find(carId) == carBrands.end()) {
        cout << "Invalid Car ID" << endl;
        cout << "------------------------------" << endl;
        continue;
      }
      cout << "Result: " << carBrands[carId] << endl;
      cout << "------------------------------" << endl;
    }

    if (argument == "getcapacity") {
      cout << "------------------------------" << endl;
      cout << "Please enter the Car ID" << endl;
      int carId; cin >> carId;
      if (carCapacities.find(carId) == carCapacities.end()) {
        cout << "Invalid Car ID" << endl;
        cout << "------------------------------" << endl;
        continue;
      }
      cout << "Result: " << carCapacities[carId] << endl;
      cout << "------------------------------" << endl;
    }

    if (argument == "getvelocity") {
      cout << "------------------------------" << endl;
      cout << "Please enter the Car ID" << endl;
      int carId; cin >> carId;
      if (carVelocities.find(carId) == carVelocities.end()) {
        cout << "Invalid Car ID" << endl;
        cout << "------------------------------" << endl;
        continue;
      }
      cout << "Result: " << carVelocities[carId] << endl;
      cout << "------------------------------" << endl;
    }

    if (argument == "calccapacity") {
      cout << "------------------------------" << endl;
      cout << "Please enter the Car ID" << endl;
      int car1Id; cin >> car1Id;
      if (carCapacities.find(car1Id) == carCapacities.end()) {
        cout << "Invalid Car ID" << endl;
        cout << "------------------------------" << endl;
        continue;
      }

      cout << "Please enter the Car ID" << endl;
      int car2Id; cin >> car2Id;
      if (carCapacities.find(car2Id) == carCapacities.end()) {
        cout << "Invalid Car ID" << endl;
        cout << "------------------------------" << endl;
        continue;
      }

      float sumCapacity = carCapacities[car1Id] + carCapacities[car2Id];
      cout << "Result: " << sumCapacity << endl;
      cout << "------------------------------" << endl;
    }

    if (argument == "calcvelocity") {
      cout << "------------------------------" << endl;
      cout << "Please enter the Car ID" << endl;
      int car1Id; cin >> car1Id;
      if (carVelocities.find(car1Id) == carVelocities.end()) {
        cout << "Invalid Car ID" << endl;
        cout << "------------------------------" << endl;
        continue;
      }

      cout << "Please enter the Car ID" << endl;
      int car2Id; cin >> car2Id;
      if (carVelocities.find(car2Id) == carVelocities.end()) {
        cout << "Invalid Car ID" << endl;
        cout << "------------------------------" << endl;
        continue;
      }

      int sumVelocity = carVelocities[car1Id] + carVelocities[car2Id];
      int avgVelocity = sumVelocity / 2;
      cout << "Result: " << avgVelocity << endl;
      cout << "------------------------------" << endl;
    }
  }
}