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;
  long sol1(long n){
    auto upper = (n/2)%MOD;
    auto lower = (n - upper)%MOD;
    auto res = (lower) + ((lower)+1)*(upper);
    return res%MOD;
  }
  sol1(N).writeln;
}