import numpy as np

MOD = 1_000_000_007


def pow_matrix_mod(x, n, mod=MOD):
    if not n:
        return np.eye(len(x), dtype=np.object)
    if n % 2 == 0:
        return pow_matrix_mod(x @ x % mod, n // 2) % mod
    else:
        return x @ pow_matrix_mod(x @ x % mod, (n - 1) // 2) % mod


N = int(input())
A = np.array([[1, 1], [1, 0]], dtype=np.object)
res = pow_matrix_mod(A, N)
print(res[0, 0] * res[0, 1] % MOD)