#include<cstdio>
#include<cmath>
#include<cstdlib>
#define nmax 50000
struct eu{int x,y;};
eu vcc[50001];
int v[50001],vc[50001],i,j,n,m,x,y,lin,col,lm,cm,s1,s2;
int main ()
{
freopen("tribute.in","r",stdin);
freopen("tribute.out","w",stdout);
scanf("%d%d%d",&n,&lin,&col);
for(i=1;i<=n;i++)
    {
    scanf("%d%d",&vcc[i].x,&vcc[i].y);
    v[vcc[i].x]++;
    vc[vcc[i].y]++;
    s1=s1+vcc[i].x;
    s2=s2+vcc[i].y;
    }
/*for(i=1;i<=nmax;i++)
    {
    v[i]=v[i]+v[i-1];
    vc[i]=vc[i]+vc[i-1];
    }*/
int difmax=0,dm1=0,poz,poz1,poz2,poz3;
/*for(i=0;i+lin<=nmax;i++)
    if(v[i+lin]-v[i]>=difmax)
        {
        difmax=v[i+lin]-v[i];
        poz=i;
        }
for(i=0;i+col<=nmax;i++)
    if(vc[i+col]-vc[i]>=dm1)
        {
        dm1=vc[i+col]-vc[i];
        poz1=i;
        }*/
poz=s1/n;
poz1=s2/n;
poz-=lin/2;
poz1-=col/2;
int min=2000000000;
int k1=poz,k2=poz1;
for(j=k1-10;j<=k1+10;j++)
    for(int l=k2-10;l<=k2+10;l++)
        {
        int s=0;
        poz=j;
        poz1=l;
        poz2=poz+lin;
        poz3=poz1+col;
        for(i=1;i<=n;i++)
            {
            if(vcc[i].x<=poz)
                s+=poz-vcc[i].x;
            if(vcc[i].x>=poz2)
                s+=vcc[i].x-poz2;
            if(vcc[i].y<=poz1)
                s+=poz1-vcc[i].y;
            if(vcc[i].y>=poz3)
                s+=(-poz3+vcc[i].y);
            }
        if(s<min)
            min=s;
        }
printf("%d",min);
return 0;
}