03. Bike Race

#include <iostream>
#include <string>
#include <iomanip>
using namespace std;

int main()
{

    double juniors;
    double seniors;
    string trace;
    cin >> juniors >> seniors >> trace;

    double priceJuniors = 0;
    double priceSeniors = 0;

    if (trace == "trail")
    {
        priceJuniors = 5.5;
        priceSeniors = 7;
    }
    else if (trace == "cross-country")
    {
        if (juniors + seniors >= 50)
        {
            priceJuniors = 8 * 0.75;
            priceSeniors = 9.5 * 0.75;
        }
        else
        {
            priceJuniors = 8;
            priceSeniors = 9.5;
        }
    }
    else if (trace == "downhill")
    {
        priceJuniors = 12.25;
        priceSeniors = 13.75;
    }
    else
    {
        priceJuniors = 20;
        priceSeniors = 21.5;
    }
    double sum = juniors * priceJuniors + seniors * priceSeniors;
    double expenditure = (priceJuniors * juniors + priceSeniors * seniors) * 0.05;
    double left = sum - expenditure;
    cout << fixed << setprecision(2) << left << endl;

    return 0;
}