#include <iostream>
using namespace std;

int main(){
  double x1,y1,x2,y2,x3,y3,xp,yp;

  while( cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> xp >> yp ){

    if(((( x1 <= xp && xp <= x2 )||( x2 <= xp && xp <= x1 )) &&(( y1 <= yp && yp <= y2 )||( y2 <= yp && yp <= y1 )))||((( x1 <= xp && xp <= x3 ) || ( x3 <= xp && xp <= x1))&&(( y1 <= yp && yp <= y3 )||(y3 <= yp <= y1 )))||((( x2 <= xp && xp <= x3 ) || ( x3 <= xp && xp <= x2))&&(( y2 <= yp && yp <= y3 )||(y3 <= yp <= y2 )))) cout << "YES" << endl;
    else cout << "NO" << endl;

  }

  return 0;
}