#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <cmath>
#include <cctype>
#include <array>

using namespace std;

class Part{
    string Name;
    int Sn;
    double Weight;
    string Type;

    public:
        string setType(double weight) {
            return (weight > 50) ? "heavy" : "light";
        }
    private:
        void init(string name, int Sn, int Weight){
            Name = name;
            this->Sn = Sn;
            this->Weight = Weight;
            Type = setType(Weight);
        }
    public:
        Part(){
            init("unknown part", 0, 0);
        }
        Part(string Name){
            init(Name, 0, 0);
        }
        Part(string name, int Sn, int Weight){
            init(Name, Sn, Weight);
        }

        void setParam(int sn, int weight){
            init(Name, sn, weight);
        }
 /*  //////////////////////////////////////// kaip padaryti, kad pagal varda grazintu Sn?
        double getSn(string name){
            ...
            return Sn;
        }
*/  ///////////////////////////////////////
        void getPartInf(){
            cout << Name << "|" << Sn << "|" << Weight << "|" << Type << endl;
        }

};

int main(){
    Part p1(), p2("stumoklis"), p3("piston", 2546, 32);

    p3.getPartInf();

    p2.setParam(3567, 55);
    p2.getPartInf();

    return 0;
}