#include <stdio.h>
#include <stdlib.h>
#include <math.h>

# define M_PI		3.14159265358979323846	/* pi */
# define M_PI_2		1.57079632679489661923	/* pi/2 */

int main() { 
	int x0,y0,N,x,y,i,count,max,k;
	float r;
	double du;
	double bod[300];

	for(;;) {
		scanf("%d %d %f\n", &x0,&y0,&r);
		if (r < 0)
			return 0;
		scanf("%d\n", &N);
		count=0;
		for(i=0; i<N; ++i) {
			scanf("%d %d\n", &x,&y);
			x -= x0;
			y -= y0;
			if (r*r+1e-10 >= x*x+y*y) {
				if (x < 0)
					bod[count++] = x ? atan(y/x) : M_PI_2;
				else
					bod[count++] = x ? M_PI-atan(-y/x) : -M_PI_2;
			}
		}
		max=0;
		if (count)	{
			int comp(const void *a, const void *b) {
					return *(double*)a > *(double*)b;
				}
			qsort((void*)bod, count, sizeof(double), comp);
			memcpy((void*)(bod+count), (void*)bod, sizeof(double)*count);
			for (i=0; i < count; ++i) {
				for (k=1; k<count;) {
					du = bod[i+k] - bod[i] + 1e-11;
					if (du < 0)
						du += 2* M_PI;
					else if (du > 2*M_PI)
						du -= 2* M_PI;
					if (du - 1e-10 <= M_PI)
						++k;
					else
						break;
				}
				if (k > max) {
					max = k;
					if (max == count)
						break;
				}
			}
		}
		printf("%d\n", max);
	}
	return 0;
}