import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Queue;
import java.util.StringTokenizer;

public class Main {

    void solve() throws IOException {
        int l = ni();
        l /= 4;

        int n = 1;
        while ((n + 1) * (n + 1) <= l) n++;

        int ans = 0;
        for (int i = 2; i <= n; i++) {
            for (int j = 1; j < i; j++) {
                if ((i + j) % 2 == 1 && gcd(i, j) == 1 && 2 * i * j + 2 * i * i <= l) {
                    ans++;
                }
            }
        }

        out.println(ans);
    }

    int gcd(int a, int b) {
        return a == 0 ? b : gcd(b % a, a);
    }

    String ns() throws IOException {
        while (!tok.hasMoreTokens()) {
            tok = new StringTokenizer(in.readLine(), " ");
        }
        return tok.nextToken();
    }

    int ni() throws IOException {
        return Integer.parseInt(ns());
    }

    long nl() throws IOException {
        return Long.parseLong(ns());
    }

    double nd() throws IOException {
        return Double.parseDouble(ns());
    }

    String[] nsa(int n) throws IOException {
        String[] res = new String[n];
        for (int i = 0; i < n; i++) {
            res[i] = ns();
        }
        return res;
    }

    int[] nia(int n) throws IOException {
        int[] res = new int[n];
        for (int i = 0; i < n; i++) {
            res[i] = ni();
        }
        return res;
    }

    long[] nla(int n) throws IOException {
        long[] res = new long[n];
        for (int i = 0; i < n; i++) {
            res[i] = nl();
        }
        return res;
    }

    static BufferedReader in;
    static PrintWriter out;
    static StringTokenizer tok;

    public static void main(String[] args) throws IOException {
        in = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(System.out);
        tok = new StringTokenizer("");
        Main main = new Main();
        main.solve();
        out.close();
    }
}