import std.stdio;
import std.string;
import std.algorithm;
import std.conv;
//---------------------
void main(){
  auto MOD = 1_000_007;
  auto N = readln.chomp.to!long;
  auto upper = (N / 2) % MOD;
  auto lower = (N - upper) % MOD;
  (((lower) + ((lower) + 1) * (upper)) % MOD).writeln;
}