//
// LiBigInt.h
// Free for educational use.. By Chung-Chih Li,  8-21-2003
//
#include <vector>
using namespace std;

class LiBigi
{
public:
    LiBigi();
    LiBigi(long n);
    void shift_left_10();
    char shift_right_10(); // returns the killed digit
    char operator [](int i);
    vector<char> number;   // push_back a as the most significant digit.  
	char mysign;
};

/************************************/
// Standard I/O operators.   
/************************************/
ostream & operator << (ostream & outputstream, LiBigi & n);
istream & operator >> (istream & inputstream, LiBigi & n);


/************************************/
// Standard logical operators. 
/************************************/
bool operator == (LiBigi a, LiBigi b);
bool operator != (LiBigi a, LiBigi b);
bool operator >= (LiBigi a, LiBigi b);
bool operator >  (LiBigi a, LiBigi b);
bool operator <= (LiBigi a, LiBigi b);
bool operator <  (LiBigi a, LiBigi b);


/************************************/
// Standard arithmetic operators.   //
/************************************/
LiBigi operator + (LiBigi a, LiBigi b);
LiBigi operator - (LiBigi a, LiBigi b);
LiBigi operator * (LiBigi a, LiBigi b);
LiBigi operator / (LiBigi a, LiBigi m);
LiBigi operator ^ (LiBigi a, LiBigi b);
LiBigi operator % (LiBigi a, LiBigi m);
LiBigi operator ++ (LiBigi & a);


/************************************/
// Miscellanea                      //
/************************************/
long to_long(LiBigi n);
LiBigi ABS(LiBigi a);
void half(LiBigi &n);
void cut_leading_zero(LiBigi &n);