def main():
    n, m = [int(i) for i in input().split()]

    f_1 = 0
    f_2 = 1
    f = [f_1, f_2]

    for i in range(2, n):
        f_n = f[i - 1] + f[i - 2]
        f.append(f_n)
        # print(f[i])

    ans = f[n - 1] % m

    # print(n)
    # print(m)
    print(ans)


if __name__ == "__main__":
    main()