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

constexpr const int HEAD_PROB { 52 };

class Coin
{
public:
    Coin(double nominal, double sale)
        : nominal{nominal}, sale{sale} {}
    static string flip()
    {
        static random_device rnd;
        static uniform_int_distribution<> dist{0,1};
        if ( dist(rnd) )
            return "krona";
        return "klave";
    }

    double sale_value() const { return sale; }
    double nominal_value() const { return nominal; }

private:
    double nominal;
    double sale;
};

double toss_coins(Coin const & coin)
{
    random_device rnd;
    uniform_int_distribution<> dist {0,100};
    double win {};
    for ( int toss {}; toss < 1'000'000; ++toss )
    {
        int factor {1};
        if ( coin.flip() == "klave" && dist(rnd) > HEAD_PROB )
        {
            factor = -1;
        }
        win += factor * coin.nominal_value();
    }
    return win;
}

int main()
{
    double nom, sale;
    cout << "Mata in myntets nominella värde: ";
    cin >> nom;
    cout << "Mata in myntets försäljningsvärde: ";
    cin >> sale;
    Coin c { nom, sale};
    double val { toss_coins(c) };
    cout << "\nProfessorn vinner " << fixed << setprecision(2) << val << "kr\n";
}