Vitalianskiy Lavrov

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	float a,b,c,d,e,f,g,h,f1,f2;
	printf("a,b,c,d,e,f,g,h,\n");
	scanf("%f%f%f%f%f%f%f%f", &a,&b, &c, &d, &e, &f, &g, &h);
f1=(a-e)*(h-f)-(b-f)*(g-e);
      scanf ("(a-e)*(h-f)-(b-f)*(g-e)=%f", f1 );
	f2=(c-e)*(h-f)-(d-f)*(g-e);
    	 scanf("(c-e)*(h-f)-(d-f)*(g-e)=%f", f2 );

	
	if ((f1>0) && (f2>0)) 
	{printf("Yes");}
	  else if ((f1<0) && (f2<0))
	 {printf("Yes");}
	    else   
	    {printf("NO");}
	   

	return 0;
}