#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>

double fact(int n)
{
 int i;
 double res=1;
 for(i=2;i<=n;i++)
  res*=i;
 return res;
}

double C(int n,int k)
{
 return fact(n)/(fact(k)*fact(n-k));
}

double B(int k,int n,double u)
{
 return C(n,k)*pow(u,k)*pow(1-u,n-k);
}

int main()
{
int n=3,k;
int x[50]={100,200,300,400},y[50]={100,200,300,100};

int gd=DETECT,gm;
double u,t,tx,ty;

scanf("%d",&n); n--;

for(int i=0;i<=n;i++)
 scanf("%d%d",&x[i],&y[i]);


initgraph(&gd,&gm,"c:\\tcpp30\\bgi");

for(u=0.001;u<=1.0;u+=0.001)
{
 tx=ty=0.0;
 for(k=0;k<=n;k++)
 { t=B(k,n,u);
   tx+=x[k]*t;
   ty+=y[k]*t;
 }
 putpixel(tx,ty,WHITE);
}
getch();

return 0;
}