#include <string>
#include <math.h>
using namespace std;

class Bignum
{
// values
public:
    string value;
    string value_abs;
private:
    string value_bin;
    string value_oct;
    string value_hex;
// flags
public:
    bool zero; // value = 0
    bool positive; // value > 0
    bool negative; // value < 0
//constructor
    Bignum()
    {
        this->clear();
    }
// methodes
private:
    void clear(); // clear all values and flags
public:
    ?TYPE? addiction(string, string);
    ?TYPE? addiction(string, int);
    ?TYPE? addiction(int, string);
    ?TYPE? addiction(int, int);
    ?TYPE? addiction(Bignum, Bignum);
    ?TYPE? addiction(Bignum, string);
    ?TYPE? addiction(string, Bignum);
    ?TYPE? addiction(Bignum, int);
    ?TYPE? addiction(int, Bignum);
    ?TYPE?
    ?TYPE?
    ?TYPE?
};

int main() {}