#include <iostream>

 #include <cstring>

 #include <cstdio>

 #include <cstdlib>

 #include <cmath>

 using namespace std;

 #define eps 1e-8

 struct point

 {

     double x,y;

 }p[];

 double dis(point p1,point p2)

 {

     return sqrt((p1.x-p2.x)*(p1.x-p2.x)+(p1.y-p2.y)*(p1.y-p2.y));

 }

 double xmult(point p1,point p2,point p0)

 {

     return (p1.x-p0.x)*(p2.y-p0.y)-(p2.x-p0.x)*(p1.y-p0.y);

 }

 int main()

 {

     point r;

     double d;

     int n,m,i,j,ans,temp;

     while(scanf("%lf%lf%lf",&r.x,&r.y,&d)!=EOF)

     {

         if(d < ) break;

         scanf("%d",&n);

         m = ;

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

         {

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

         }

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

         {

             if(dis(p[i],r) > d)

             continue;

             p[m++] = p[i];

         }

         ans = ;

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

         {

             temp = ;

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

             {

                 if(xmult(p[i],p[j],r) >= )

                 temp ++;

             }

             ans = max(ans,temp);

         }

         printf("%d\n",ans);

     }

     return ;

 }