#include<fstream.h>
typedef struct nod{long x,y; nod *urm; }TNOD;
TNOD *prim,*ultim,*nou,*p;
long k,n,x,y,w,h,m,x1,y1,st=320000,dr=-320000,jos=320000,sus=320000;
int test()
{          int ok=0;
 while (p)
   {
   if(x1>=p->x&&x1<=p->x+w&&y1>=p->y&&y1<=p->y+h) {ok=1; break;}
   p=p->urm;
     }
 return ok;
}
void creare()
{
}
int  main()
{long i,j,nr=0;
ifstream f("ograzi.in");
f>>n>>m>>w>>h;
prim=new TNOD;
  f>>x1>>y1;
  prim->x=x1; prim->y=y1;
  if(x1<st)  st=x1;
  if(x1+w>dr)  dr=x1+w;
  if(y1<jos)  jos=y1;
  if(y1+h>sus)  sus=x1+h;
  prim->urm=NULL;
  ultim=prim;

for(i=2;i<=n;i++)
  {f>>x1>>y1;; nou=new TNOD; nou->x=x1; nou->y=y1; nou->urm=NULL; ultim->urm=nou; ultim=nou;
   if(x1<st)  st=x1;
  if(x1+w>dr)  dr=x1+w;
  if(y1<jos)  jos=y1;
  if(y1+h>sus)  sus=x1+h;
  }
for(i=1;i<=m;i++)
  {f>>x1>>y1; p=prim;
  if(x1>=st||x1<=dr||y1<=sus||y1>=jos)      
  if(test())  nr++;
  }  f.close();
  ofstream g("ograzi.out");
  g<<nr;
  g.close();return 0;
}