package net.ukr.shyevhen;

import java.util.Scanner;

public class HomeWorkL2E2 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int x0;
		int y0;
		int x1 = 0;
		int y1 = 0;
		int x2 = 4;
		int y2 = 4;
		int x3 = 6;
		int y3 = 1;
		int a;
		int b;
		int c;

		System.out.print("Enter coordinate x: ");
		x0 = sc.nextInt();
		System.out.print("Enter coordinate y: ");
		y0 = sc.nextInt();
		a = (x1 - x0) * (y2 - y1) - (x2 - x1) * (y1 - y0);
        b = (x2 - x0) * (y3 - y2) - (x3 - x2) * (y2 - y0);
        c = (x3 - x0) * (y1 - y3) - (x1 - x3) * (y3 - y0);
        if ((a <= 0 && b <= 0 && c <= 0) || (a >= 0 && b >= 0 && c >= 0)) {
        	System.out.println("This point in the triangle.");
        } else {
        	System.out.println("This point isn't in the triangle.");
        }


	}

}