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

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

def matrixPow(A, n, N, mod):
	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([[0, 0, 0, 0, 0, 0, 0, 1, 1],
				[0, 0, 0, 1, 0, 1, 0, 0, 0],
				[1, 1, 0, 0, 0, 0, 0, 0, 0],
				[1, 0, 0, 0, 0, 0, 0, 0, 0],
				[0, 1, 0, 0, 0, 0, 0, 0, 0],
				[0, 0, 1, 0, 0, 0, 0, 0, 0],
				[0, 0, 0, 1, 0, 0, 0, 0, 0],
				[0, 0, 0, 0, 1, 0, 0, 0, 0],
				[0, 0, 0, 0, 0, 1, 0, 0, 0]])
	B = matrixPow(A, N - 1, 9, mod)
	a = np.array([[1], [1], [1], [0], [1], [0], [0], [0], [1]])
	# print(B)
	anspre = B @ a
	ans = anspre[-1, 0] + anspre[-2, 0] + anspre[-3, 0]
	print(ans % mod)

if __name__ == '__main__':
	main()