import java.util.Scanner;
class Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
long n=sc.nextLong();
long d=sc.nextLong();
int cnt=0;

//long x[],y[]; x=new long[n]; y=new long[n];
long[] x=new long[(int)n];
long[] y=new long[(int)n];
int i=0;

while((n--)>0){
x[i]=sc.nextLong();
y[i]=sc.nextLong();
if(d*d>=(x[i]*x[i]+y[i]*y[i]))
cnt++;
i++;
}
System.out.println(cnt);
}


}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz