Untitled

#include <iostream>
using namespace std;
int main()
{
	int k, x, b, y;
	cin >> k >> b;
	cin >> x;
	y = k * x + b;
	if (y > 0 && x > 0)cout << "I chetvert";
	if (y > 0 && x < 0)cout << "II chetvert";
	if (y < 0 && x < 0)cout << "III chetvert";
	if (y < 0 && x > 0)cout << "IV chetvert";
}