import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
mod = 10 ** 9 + 7; INF = float("inf")

import numpy as np

def getlist():
	return list(map(int, input().split()))

def matrixPow(A, n, N):
	B = np.identity(N, dtype = np.int)
	while n > 0:
		if n & 1 == 1:
			B = (A @ B) % mod
		A = (A @ A) % mod
		n >>= 1
	return B


#処理内容
def main():
	N = int(input())
	A = np.array([[1, 1], [1, 0]])
	start = np.array([[1], [0]])
	mat = matrixPow(A, N, 2)
	pre = mat @ start
	ans = (pre[0, 0] * pre[1, 0]) % mod
	print(ans)

if __name__ == '__main__':
	main()