04. Transport Price

#include <iostream>
#include <iomanip>

using namespace std;

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

    string timeOfDay;
    cin >> timeOfDay;

    const double TAXI_STARTING_PRICE = 0.70;
    const double TAXI_PRICE_PER_KILOMETER = (timeOfDay == "day" ? 0.79 : 0.90);
    const double BUS_PRICE_PER_KILOMETER = 0.09;
    const double TRAIN_PRICE_PER_KILOMETER = 0.06;

    double taxiPrice = TAXI_STARTING_PRICE + TAXI_PRICE_PER_KILOMETER * kilometers;
    double busPrice = BUS_PRICE_PER_KILOMETER * kilometers;
    double trainPrice = TRAIN_PRICE_PER_KILOMETER * kilometers;

    double cheapestPrice = kilometers < 20 ? taxiPrice : kilometers < 100 ? busPrice : trainPrice;

    cout.setf(ios::fixed);
    cout.precision(2);

    cout << cheapestPrice << endl;

    return 0;
}