#include <stdio.h>

int trx[150];
int try[150];
double trr[150];

int a,b,pocnej,poc,X,Y,N,rad;
int i,j,k,x;

int main()
{
  while (1) {
    scanf("%d %d %f\n%d\n",&X,&Y,&rad,&N);
    if (rad < 0) 
      return(0);
    a = 0;
    for (i = 0; i < N; i++) {
      scanf("%d %d\n",&trx[i-a],&try[i-a]);
      trr[i-a] = sqrt( (double) (X-trx[i-a])*(X-trx[i-a]) + (Y-try[i-a])*(Y-try[i-a]));   
 /*     printf("[%f] \n",trr[i-a]);*/
      if (trr[i-a] > (double) rad)
        a++;
    }
    x = a;
    pocnej = 0;
    for (i = 0; i < N-x; i++) {
      for (j = 0; j < N-x; j++) {
        a = try[i] + try[j];
        b = -1 * (trx[i] + try[j]);
        poc = 0;

        for (k = 0; k < N-x; k++) {       
          if ( (a*trx[k]+b*try[k]) >= 0) {
            poc++;
/*            printf("%d \n",poc);    */
          }
          
        }     
        if (pocnej < poc)
          pocnej = poc;   
      }  
    }
    printf("%d\n",pocnej);   
  } 
}