#include <iostream>
#include <map>
#include <fstream>
#include <vector>

using namespace std;

vector<string> split(const string& s, const char delimiter, bool ignore_empty = false){
    vector<string> result;
    string tmp = s;

    while(tmp.find(delimiter) != string::npos)
    {
        string new_part = tmp.substr(0, tmp.find(delimiter));
        tmp = tmp.substr(tmp.find(delimiter)+1, tmp.size());
        if(not (ignore_empty and new_part.empty()))
        {
            result.push_back(new_part);
        }
    }
    if(not (ignore_empty and tmp.empty()))
    {
        result.push_back(tmp);
    }
    return result;
}

bool is_number(const string& s)
{
    string::const_iterator it = s.begin();
    while (it != s.end() && isdigit(*it)) ++it;
    return !s.empty() && it == s.end();
}


int main()
{
    string tiedoston_nimi = "";
    cout << "Input file: ";
    getline(cin, tiedoston_nimi);

    ifstream tiedosto_olio(tiedoston_nimi);
        if ( not tiedosto_olio )
        {
            cout << "Error: the input file cannot be opened" << endl;
            return EXIT_FAILURE;
        }

        string rivi;
        while(getline(tiedosto_olio, rivi))
        {
             vector<string> rivi_vektori = split(rivi, ';');

             for (unsigned long int k = 0; k < rivi_vektori.size()-1; ++k)
             {
                 cout << rivi_vektori.at(k) << endl;
             }


             if (rivi_vektori.size() != 3 or !(is_number(rivi_vektori.at(3)) or rivi_vektori.at(3) == "on-the-shelf"))
             {
                cout << "Error: the file has an erroneous line" << endl;
             }
             else
             {
                 for (int i = 0; i < 3; ++i)
                 {
                     if (rivi_vektori.at(i) == "")
                     {
                         cout << "Error: the file has an erroneous line" << endl;
                     }
                 }
             }
        }

}