import std.algorithm, std.container, std.conv, std.math, std.range, std.typecons, std.stdio, std.string;

auto rdsp(){return readln.splitter;}
void pick(R,T)(ref R r,ref T t){t=r.front.to!T;r.popFront;}
void readV(T...)(ref T t){auto r=rdsp;foreach(ref v;t)pick(r,v);}

void main()
{
  int n; readV(n);

  auto r = 0;
  for (auto i = 105; i <= n; i += 2) {
    auto f = 0;
    foreach (j; 1..i+1)
      if (i%j == 0) ++f;
    if (f == 8) ++r;
  }

  writeln(r);
}
