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

void main()
{
  auto n = readln.chomp.to!long;

  auto ri = iota(2800).map!(y => calc(y));
  auto c = ri.count!(r => r == ri[2014]);

  auto r = (n - 2015) / 2800 * c;
  auto m = (n - 2015) % 2800;
  if (m + 2015 < 2800) {
    r += ri[2015..m + 2015 + 1].count!(r => r == ri[2014]);
  } else {
    r += ri[2015..$].count!(r => r == ri[2014]);
    r += ri[0..m + 2015 - 2800 + 1].count!(r => r == ri[2014]);
  }

  writeln(r);
}

long calc(long y)
{
  return (y + y / 4 - y / 100 + y / 400) % 7;
}