p = 1000000007

def solve(N):
    if N < 10:
        return int('1' + '3' * N) % p
    ans = (10 ** (N%9)) % p * pow(-7, (N//9), p)
    ans += (3 * 111111111 * 10 ** (N%9)) % p * (1 - pow(-7, (N//9), p)) * 125000001
    ans += int('3' * (N%9))
    return ans % p

N = int(input())
print(solve(N))