#ifndef SATH
#define SATH
#include <iostream>
using namespace std;

class sat {
	int n;
public:
	sat& operator=(int i);
	sat(int new_n = 200) {*this = new_n;} //(*this).operator=(new_n);
	operator int() const {return n;}
};

//Reference argument is read/write.  return s.operator=(s.operator int() + i);
inline sat& operator+=(sat& s, int i) {return s = s + i;}
inline sat& operator-=(sat& s, int i) {return s = s - i;}

//Prefix operators
inline sat& operator++(sat& s) {return s += 10;}
inline sat& operator--(sat& s) {return s -= 10;}

//Postfix operators
inline const sat operator++(sat& s, int) {const sat old = s; ++s; return old;}
inline const sat operator--(sat& s, int) {const sat old = s; --s; return old;}

inline const sat operator+(sat s, int i) {return s += i;}
inline const sat operator+(int i, sat s) {return s += i;}
inline const sat operator-(sat s, int i) {return s -= i;}

istream& operator>>(istream& i, sat& s);
#endif