#include <iostream>
#define ll long long int
using namespace std;
double total,minim=100000000000;
struct e
{
    int x,y;
}v[105];
int n;
int main()
{
    int i,a,b;
    cin>>n;
    for(i=1;i<=n;i++) cin>>v[i].x>>v[i].y;
    for(a=-1000;a<=1000;a++)
        for(b=-1000;b<=1000;b++)
        {
            for(i=1;i<=n;i++)
                total=total+(ll)(v[i].y-(ll)a*v[i].x-b)*(v[i].y-a*v[i].x-b);
                if(total<minim ) minim=total;
        }
    cout<<minim;

}