#include <iostream>
#include <cmath>
#include <cstdlib>
#include <string>
#include <fstream>
using namespace std;

int main()

{
    cout<<"1 -  10->16 , 2- 16->10"<<endl;

    int a,liczba,c;
    string table[100];
    cin>>a;
    cout<<"podaj liczbe"<<endl;

    switch(a)
    {
    case 1:
        cin>>liczba;
        cout<<endl<<"wynik to: "<<endl;

        while(liczba>15)
        {

            c = liczba%16;

            if(c == 0)
            cout<<"0";
            if(c == 1)
            cout<<"1";
            if(c == 2)
            cout<<"2";
            if(c == 3)
            cout<<"3";
            if(c == 4)
            cout<<"4";
            if(c == 5)
            cout<<"5";
            if(c == 6)
            cout<<"6";
            if(c == 7)
            cout<<"7";
            if(c == 8)
            cout<<"8";
            if(c == 9)
            cout<<"9";
            if(c == 10)
            cout<<"a";
            if(c == 11)
            cout<<"b";
            if(c == 12)
            cout<<"c";
            if(c == 13)
            cout<<"d";
            if(c == 14)
            cout<<"e";
            if(c == 15)
            cout<<"f";
            cout<<endl;

            liczba = (liczba-c)/16;
        }
             c = liczba;

            if(c == 0)
            cout<<"0";
            if(c == 1)
            cout<<"1";
            if(c == 2)
            cout<<"2";
            if(c == 3)
            cout<<"3";
            if(c == 4)
            cout<<"4";
            if(c == 5)
            cout<<"5";
            if(c == 6)
            cout<<"6";
            if(c == 7)
            cout<<"7";
            if(c == 8)
            cout<<"8";
            if(c == 9)
            cout<<"9";
            if(c == 10)
            cout<<"a";
            if(c == 11)
            cout<<"b";
            if(c == 12)
            cout<<"c";
            if(c == 13)
            cout<<"d";
            if(c == 14)
            cout<<"e";
            if(c == 15)
            cout<<"f";
            cout<<endl;


        break;
        case 2:
        //porzucilem

        break;
}

    return 0;
}