#include <cstdio>

 #include <cstring>

 #include <string>

 #include <cmath>

 #include <ctime>

 #include <cstdlib>

 #include <iostream>

 using namespace std;

 struct point

 {

     double x,y;

 }p[];

 int n;

 int a[] = {,,-,};

 int b[] = {,-,,};

 double dis(double x1,double y1,double x2,double y2)

 {

     return sqrt((x1-x2)*(x1-x2)+(y2-y1)*(y2-y1));

 }

 double fun(double x,double y)

 {

     double ans = ;

     int i;

     for(i = ;i < n;i ++)

     {

         ans += dis(p[i].x,p[i].y,x,y);

     }

     return ans;

 }

 int main()

 {

     int T,i,key,num,j,k;

     double tx,ty,ans,d,x,y;

     srand(time(NULL));

     scanf("%d",&n);

     for(i = ;i < n;i ++)

     {

         scanf("%lf%lf",&p[i].x,&p[i].y);

     }

     key = ;

     ans = ;

     num = ;

     x = p[].x;

     y = p[].y;

     T = ;

     while(T--)

     {

         for(i = ;i <= num;i ++)

         {

             for(j = ;j < ;j ++)

             {

                 k = rand()%key;

                 tx = x + k*a[j]*T;

                 ty = y + k*b[j]*T;

                 if(tx >= &&tx <= &&ty >= &&ty <= )

                 {

                     d = fun(tx,ty);

                     if(ans > d)

                     {

                         ans = d;

                         x = tx;

                         y = ty;

                     }

                 }

             }

         }

     }

     printf("%.f\n",ans);

     return ;

 }