function Main(input) {
  input = input.split("\n");
  var N = parseInt(input[0].split(" ")[0]);
  var D = parseInt(input[0].split(" ")[1]);
  input.shift();
  var P = input.map(i => i.split(" ").map(i => parseInt(i)));
  P.splice(N,P.length);
  var ans =0;
  for(var i=0;i<N;i++){
    if(Math.pow(P[i][0],2)+Math.pow(P[i][1],2)<=Math.pow(D,2)){
      ans++;
    }
  }


  console.log('%s', ans);
  return ans;
}

function debug(n){
  var input = document.getElementById("input"+n).value;
  var ans=Main(input);
  var result="WA";
  if(ans==document.getElementById("output"+n).value.split("\n")[0]){
    result="AC";
  }
  document.getElementById("result"+n).innerHTML=result;
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));