# coding: utf-8 import array, bisect, collections, copy, heapq, itertools, math, random, re, string, sys, time sys.setrecursionlimit(10 ** 7) INF = 10 ** 20 MOD = 10 ** 9 + 7 def II(): return int(input()) def ILI(): return list(map(int, input().split())) def IAI(LINE): return [ILI() for __ in range(LINE)] def IDI(): return {key: value for key, value in ILI()} def read(): N = II() return (N,) def solve(N): num_div = N // 2 ans = ((num_div + 1) * (N - num_div + 1) - 1) % MOD return ans def main(): params = read() print(solve(*params)) if __name__ == "__main__": main()