03. Products and Cities(90/100)

#include <iostream>
#include <string>
#include <map>

using namespace std;

int main() {
    int n;
    cin >> n;

    map<string, double> cities;

    while (true) {
        cin.ignore();

        string city;
        getline(cin, city);

        city.erase(city.find_last_not_of(' ') + 1);

        if (city.empty()) {
            break;
        }

        double price;
        int quantity;

        cin >> price >> quantity;
        cities[city] += price * quantity;
    }

    for (auto& c : cities) {
        cout << c.first << ' ' << c.second << endl;
    }
    return 0;
}