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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	double x0,x1,x2,x3,y0,y1,y2,y3;
  6. 	double z1,z2,z3;
  7. 	cin>>x0>>y0>>x1>>y1>>x2>>y2>>x3>>y3;
  8. 	z1=(x1 - x0) * (y2 - y1) - (x2 - x1) * (y1 - y0);
  9.             z2=(x2 - x0) * (y3 - y2) - (x3 - x2) * (y2 - y0);
  10.             z3=(x3 - x0) * (y1 - y3) - (x1 - x3) * (y3 - y0);
  11. 	if ((z1>=0 && z2>=0 && z3>=0) || (z1<=0 && z2<=0 && z3<=0)) cout<<"1";
  12. 	else cout<<"0";
  13. 	return 0;
  14. }
Success #stdin #stdout 0s 4548KB
comments (?)
stdin 
2 2 3 1 1 3 9 11
stdout 
1
https://ideone.com/8B97zy
Точка и треугольник
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
secret

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