#include <iostream>
using namespace std;
int x1,y1,x2,y2,x3,y3;
int ccw()
{
int a = x1 * y2 + x2 * y3 + x3 * y1;
int b = y1 * x2 + y2 * x3 + y3 * x1;
return a - b;
}
int main()
{
cin>>x1>>y1>>x2>>y2>>x3>>y3;
if(ccw()>0) cout<<1;
else if(ccw()<0) cout<<-1;
else cout<<0;
}