
import java.util.*;
import java.io.*;

public class Main {
	static FastReader in = new FastReader();

	public static void main(String[] args) {
		solve();
	}

	static void solve() {
		int n = in.nextInt();
		int d = in.nextInt();
		
		int count = 0;
		while(n-- > 0)
		{
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		}
		System.out.println(count);
	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
}


 import java.util.*; util.* java import java.io.*; io.* java public class Main {
	static FastReader in = new FastReader();

	public static void main(String[] args) {
		solve();
	}

	static void solve() {
		int n = in.nextInt();
		int d = in.nextInt();
		
		int count = 0;
		while(n-- > 0)
		{
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		}
		System.out.println(count);
	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
} Main static FastReader in = new FastReader(); in new FastReader() public static void main(String[] args) {
		solve();
	} main {
		solve();
	} solve() solve String[] args args static void solve() {
		int n = in.nextInt();
		int d = in.nextInt();
		
		int count = 0;
		while(n-- > 0)
		{
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		}
		System.out.println(count);
	} solve {
		int n = in.nextInt();
		int d = in.nextInt();
		
		int count = 0;
		while(n-- > 0)
		{
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		}
		System.out.println(count);
	} int n = in.nextInt(); n in.nextInt() in.nextInt in int d = in.nextInt(); d in.nextInt() in.nextInt in int count = 0; count 0 while(n-- > 0)
		{
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		} n-- > 0 n-- n 0 {
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		} int x =in.nextInt(); x in.nextInt() in.nextInt in int y = in.nextInt(); y in.nextInt() in.nextInt in if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++; Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) Math.sqrt Math Math.pow(x, 2) + Math.pow(y, 2) Math.pow(x, 2) Math.pow Math x 2 Math.pow(y, 2) Math.pow Math y 2 d count++ count System.out.println(count) System.out.println System.out System System.out count static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	} FastReader BufferedReader br; br StringTokenizer st; st public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		} FastReader {
			br = new BufferedReader(new InputStreamReader(System.in));
		} br = new BufferedReader(new InputStreamReader(System.in)) br new BufferedReader(new InputStreamReader(System.in)) String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		} next {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		} while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			} st == null || !st.hasMoreElements() st == null st null !st.hasMoreElements() st.hasMoreElements() st.hasMoreElements st {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			} try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				} catch (IOException e) {
					e.printStackTrace();
				} IOException e {
					e.printStackTrace();
				} e.printStackTrace() e.printStackTrace e {
					st = new StringTokenizer(br.readLine());
				} st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt() {
			return Integer.parseInt(next());
		} nextInt {
			return Integer.parseInt(next());
		} return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next long nextLong() {
			return Long.parseLong(next());
		} nextLong {
			return Long.parseLong(next());
		} return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next double nextDouble() {
			return Double.parseDouble(next());
		} nextDouble {
			return Double.parseDouble(next());
		} return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		} nextLine {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		} String str = ""; str "" try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			} IOException e {
				e.printStackTrace();
			} e.printStackTrace() e.printStackTrace e {
				str = br.readLine();
			} str = br.readLine() str br.readLine() br.readLine br return str; str public class Main {
	static FastReader in = new FastReader();

	public static void main(String[] args) {
		solve();
	}

	static void solve() {
		int n = in.nextInt();
		int d = in.nextInt();
		
		int count = 0;
		while(n-- > 0)
		{
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		}
		System.out.println(count);
	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
} public class Main {
	static FastReader in = new FastReader();

	public static void main(String[] args) {
		solve();
	}

	static void solve() {
		int n = in.nextInt();
		int d = in.nextInt();
		
		int count = 0;
		while(n-- > 0)
		{
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		}
		System.out.println(count);
	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
} Main

import java.util.*;
import java.io.*;

public class Main {
	static FastReader in = new FastReader();

	public static void main(String[] args) {
		solve();
	}

	static void solve() {
		int n = in.nextInt();
		int d = in.nextInt();
		
		int count = 0;
		while(n-- > 0)
		{
			int x =in.nextInt();
			int y = in.nextInt();
			if(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= d) count++;
		}
		System.out.println(count);
	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
}



