#include <iostream>
#include <vector>

using namespace std;

class File {
protected:
 string fname;
public:
 virtual void display(int dept) = 0;
};

class TxtFile : public File{
public:
 TxtFile(string name) {
 fname = name;
 }
 void display(int dept) {
 for (int i=0; i<dept; i++) {
 cout << "-";
 }
 cout << fname << endl;
 }
};

class MovFile : public File{
public:
 MovFile(string name) {
 fname = name;
 }
 void display(int dept) {
 for (int i=0; i<dept; i++) {
 cout << "-";
 }
 cout << fname << endl;
 }
};

class JpegFile : public File{
public:
 JpegFile(string name) {
 fname = name;
 }
 void display(int dept) {
 for (int i=0; i<dept; i++) {
 cout << "-";
 }
 cout << fname << endl;
 }
};

class Folder: public File {
private:
 vector<File*> files;
public:
 Folder(string name) {
 fname = name; 
 }
 void add(File* f) {
 files.push_back(f);
 }

 void display(int dept) {
 for (int i=0; i<dept; i++) {
 cout << "-";
 }
 cout << fname << endl;
 for(vector<File*>::iterator iter=files.begin(); iter!=files.end(); iter++) {
 (*iter)->display(dept+1);
 }
 }
};



int main(int argc, char** argv) {
 Folder* folder = new Folder("directory1");
 folder->add(new TxtFile("1.txt"));
 folder->add(new JpegFile("hmccb.jpeg"));
 folder->add(new MovFile("yellow.rmvb"));

 Folder* subdir = new Folder("subdir2");
 subdir->add(new TxtFile("2.txt"));
 subdir->add(new JpegFile("another.jpeg"));
 folder->add(subdir);

 folder->display(0);
 
}