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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Main
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		Scanner scan = new Scanner(System.in);
  10. 		double x0 = scan.nextDouble();
  11. 		double y0 = scan.nextDouble();
  12. 		double x1 = scan.nextDouble();
  13. 		double y1 = scan.nextDouble();
  14. 		double x2 = scan.nextDouble();
  15. 		double y2 = scan.nextDouble();
  16. 		double x3 = scan.nextDouble();
  17. 		double y3 = scan.nextDouble();
  18. 		double z1,z2,z3;
  19. 		z1 = (x1 - x0) * (y2 - y1) - (x2 - x1) * (y1 - y0);
  20. 		z2 = (x2 - x0) * (y3 - y2) - (x3 - x2) * (y2 - y0);
  21. 		z3 = (x3 - x0) * (y1 - y3) - (x1 - x3) * (y3 - y0);
  22. 		if ((z1>=0 && z2>=0 && z3>=0) || (z1<=0 && z2<=0 && z3<=0)) System.out.println("1");
  23. 		else System.out.println("0");
  24. 	}
  25. }
Success #stdin #stdout 0.08s 2184192KB
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https://ideone.com/gALzs3
143
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
secret

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