N, M = map(int, input().split())
if N < 3:
    print(N-1)
    exit()
N -= 2
a, b, c, d = [1, 0, 0, 1]
na, nb, nc, nd = [1, 1, 1, 0]
while N > 0:
    if N % 2 > 0:
        a, b, c, d = [na*a % M+nb*c % M, na*b %
                      M + nb * d % M, a * nc % M + c * nd % M, d * nd % M + b * nc % M]
        a %= M
        b %= M
        c %= M
        d %= M

    na, nb, nc, nd = [na*na % M+nb*nc % M, na*nb %
                      M + nb * nd % M, na * nc % M + nc * nd % M, nd * nd % M + nb * nc % M]
    na %= M
    nb %= M
    nc %= M
    nd %= M
    N //= 2
print(a)