#include <iostream>
#include<list>
#include<vector>
using std::vector;
using std::list;


class FileAudio {
private:
    double MB;
public:
    double dimensione() const { return MB; }
    virtual FileAudio* clone() const = 0;
    virtual bool quality() const = 0;
};

class Mp3 : public FileAudio {
private:
    double bitrate;
public:
    double get_bitrate() const { return bitrate; }
    virtual Mp3* clone() const {
        return new Mp3(*this);
    }
    virtual bool quality() const {
        return get_bitrate() >= 256;
    }
};

class WAV : public FileAudio {
private:
    double campionamento;
public:
    double frequenza() const { return campionamento; }
    virtual WAV* clone() const {
        return new WAV(*this);
    }
    virtual bool quality() const {
        return frequenza() >= 192;
    }
};

class MusicPlay {
private:
    list<const FileAudio*> l;
public:
    vector<WAV*> qualityWAV(double dim) const {
        vector<WAV*> v;
        for (list<const FileAudio*>::const_iterator it = l.begin(); it != l.end(); ++it) {
            const WAV * temp= dynamic_cast<const WAV*>(*it);
            if (temp && temp->dimensione() <= dim)
                v.push_back(const_cast<WAV*>(temp));
        }
        return v;

    }
    list<FileAudio*> nonConstCopy() const {
        list<FileAudio*> lista;
        for (list<const FileAudio*>::const_iterator it = l.begin(); it != l.end(); ++it) {
            lista.push_back(const_cast<FileAudio*>((*it)->clone()));
        }
    }
    vector<Mp3> removeMp3(unsigned int br) {
        vector<Mp3> v;
        for (list<const FileAudio*>::const_iterator it = l.begin(); it != l.end(); ++it) {
            Mp3* temp = dynamic_cast<Mp3*>(const_cast<FileAudio*>(*it));
            if (temp && temp->get_bitrate() < br) {
                delete* it;
                v.push_back(*temp);
            }
        }
    }
}