Contest1201/C.java

import java.util.Scanner;

public class C {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        while (cin.hasNext()) {
            double x1 = cin.nextDouble();
            double y1 = cin.nextDouble();
            double x2 = cin.nextDouble();
            double y2 = cin.nextDouble();
            double x3 = cin.nextDouble();
            double y3 = cin.nextDouble();
            if (x1 == 0 && y1 == 0 && x2 == 0 && y2 == 0 && x3 == 0 && y3 == 0)
                break;
            double k1 = slope(x1, y1, x2, y2);
            double k2 = slope(x2, y2, x3, y3);
            double k3 = slope(x1, y1, x3, y3);
            if (k1 <= k2 && k2 <= k3)
                System.out.println(1);
            else
                System.out.println(0);
        }
        cin.close();
    }

    private static double slope(double x1, double y1, double x2, double y2) {
        return Math.atan((y1 - y2) / (x1 - x2));
    }
}