MOD = 10 ** 9 + 7
D = 2

def mt(A, B):
    C = [[0] * D for _ in range(D)]
    for i in range(D):
        for j in range(D):
            tmp = 0
            for k in range(D):
                tmp += A[i][k] * B[k][j]
                tmp %= MOD
            C[i][j] = tmp
    return C

A = [[1, 1], [1, 0]]
X = [[1, 0], [0, 1]]
N = int(input())

while N > 0:
    if N & 1:
        X = mt(A, X)
    A = mt(A, A)
    N >>= 1

print((X[0][0] * X[1][0]) % MOD)