import std.algorithm, std.array, std.container, std.range;
import std.numeric, std.math, std.bigint, std.bitmanip, std.random;
import std.string, std.conv, std.stdio, std.typecons;

void main()
{
  auto l = readln.chomp.to!int;

  auto k = l / 4;
  auto max = l.to!real.sqrt.to!int;

  auto r = 0;
  foreach (m; 2..max)
    foreach (n; 1..m)
      if (isPitagolas(m, n) && sumPitagolas(m, n) <= k)
        r += 1;

  writeln(r);
}

bool isPitagolas(int m, int n)
{
  return gcd(m, n) == 1 && (m - n) % 2 == 1;
}

int sumPitagolas(int m, int n)
{
  return 2 * m ^^ 2 + 2 * m * n;
}