#include <iostream>
#include <fstream>
#include <stdlib.h>
using namespace std;
ifstream f ("pachete.in");
ofstream g ("pachete.out");
struct loc
{
    long long int x,y;
    int z;
};
loc s[50001],init;
void citire (long int &n,loc s[50001])
{
    long int i;
    f>>n;
    f>>init.x;
    f>>init.y;
    init.z=0;
    for(i=1;i<=n;i++)
    {
        f>>s[i].x;
        f>>s[i].y;
        s[i].z=0;
    }
}
int verif (long int n,loc s[50001])
{
    long int i;
    for(i=1;i<=n;i++) if(s[i].z==0) return 0;
    return 1;
}
int prog (long int n,loc s[50001])
{
    long long int a,b,i=1;
    int dr=0;
    while(verif(n,s)==0)
    {
        while(s[i].z==1) i++;
        a=llabs(init.x-s[i].x)+llabs(init.y-s[i].y);

    }
}
int main()
{
    long int n;
    citire(n,s);
    g<<n;
}