#include <cstdlib>
#include "sat.h"
using namespace std;

sat& sat::operator=(int i)
{
	if (i < 200 || i > 800 || i % 10 != 0) {
		cerr << "sat can't contain " << i << ".\n";
		exit(EXIT_FAILURE);
	}

	n = i;
	return *this;
}

istream& operator>>(istream& istr, sat& s)
{
	int i;           //uninitialized variable

	if (istr >> i) { //if (istr.operator>>(i).operator void *()) {
		s = i;       //s.operator=(i);
	}

	return istr;
}