def dot(aa, bb):
    h = len(aa)
    w = len(bb[0])
    res = [[0]*w for _ in range(h)]
    for i, row in enumerate(aa):
        for j, col in enumerate(zip(*bb)):
            v = 0
            # for a, b in zip(row, col): v += a*b
            # res[i][j] = v%md
            for a, b in zip(row, col): v += a*b%md
            res[i][j] = v%md
    return res

def matpow(mat, e):
    n = len(mat)
    res = [[1 if i == j else 0 for j in range(n)] for i in range(n)]
    while e:
        if e & 1: res = dot(res, mat)
        mat = dot(mat, mat)
        e >>= 1
    return res
md = 10 ** 9 + 7
N = int(input())
A = [[0,1],
     [1,1]]
if N % 2 == 0:
    powA = matpow(A,N//2)
    B = [[1],[1]]
    ans = dot(powA,B)
    print(ans[0][0])