n = int(input())
P = 10 ** 9 + 7

def seki(x,y):
    m = len(x)
    l = [[0] * m for _ in range(m)]
    for i in range(m):
        for j in range(m):
            for k in range(m):
                l[i][j] = (l[i][j] + x[i][k] * y[k][j]) % P
    return l

import sys
if n == 1:
    print(1)
    exit()
elif n == 2:
    print(1)
    exit()
elif n == 3:
    print(3)
    exit()
elif n == 4:
    print(2)
    exit()

if n % 2 == 0:
    m = 2
    R = [[1,1,],[1,0]]
else:
    m = 4
    R = [[1,1,1,1,],[1,0,0,0,],[0,1,0,0,],[0,0,1,0]]
e = [[0] * m for _ in range(m)]
for i in range(m):
    e[i][i] = 1
if n % 2 == 0:
    u = n // 2 - 2
    while u:
        if u & 1:
            e = seki(e,R)
        u >>= 1
        R = seki(R,R)
    ans = e[0][0] * 2 + e[0][1] * 1
    print(ans % P)
else:
    u = n - 4
    while u:
        if u & 1:
            e = seki(e,R)
        u >>= 1
        R = seki(R,R)
    ans = e[0][0] * 2 + e[0][1] * 3 + e[0][2] * 1 * e[0][3]
    print(ans % P)