#include <cstdio>
#include <cstring>
#include <cmath>
#include <algorithm>
#define maxn 1000
using namespace std; int main()
{
int f,n,t,f1;
double size,size1;
scanf("%d%lf",&f,&size);
scanf("%d",&n);
t=n;
int ans=;
while(t--)
{
scanf("%d%lf",&f1,&size1);
if(f==)
{
if(f1==)
{
if(size1<=size) ans++;
}
else if(f1==)
{
if(size*>=size1) ans++;
}
else if(f1==)
{
if(size*>=(sqrt(3.0)/2.0)*size1) ans++;
}
}
else if(f==)
{
if(f1==)
{
if(size*sqrt(2.0)>=size1*) ans++;
}
else if(f1==)
{
if(size*sqrt(2.0)>=size1) ans++;
}
else if(f1==)
{
if(size*sqrt(2.0)>=size1*(sqrt(3.0)/2.0)) ans++;
}
}
else if(f==)
{
if(f1==)
{
if(size>=*size1) ans++;
}
else if(f1==)
{
if(size>=size1) ans++;
}
else if(f1==)
{
if(size>=(sqrt(3.0)/2.0)*size1) ans++;
}
} }printf("%d\n",ans);
return ;
}

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