MOD = 10**9 + 7

def fibonacci(n):
    if n == 0:
        return 0
    elif n == 1:
        return 1
    a, b = 0, 1
    for _ in range(n-1):
        a, b = b, (a + b) % MOD
    return b

n = int(input())
if n == 0:
    print(0)
else:
    s = n // 2
    print(fibonacci(s + 1) % MOD)