#include <array>
#include <iostream>

#include <atcoder/modint>

int main() {
    using mint = atcoder::modint;

    int n, m;
    std::cin >> n >> m;

    mint::set_mod(m);

    mint ans = 1;

    std::array<std::array<mint, 2>, 2> pd{};
    pd[0][0] = { 1 };
    for (int x = 0; x < 2 * n - 3; ++x) {
        // pd: dp(x,*,*), dp: dp(x+1,*,*)
        std::array<std::array<mint, 2>, 2> dp{};
        for (int f : { 0, 1 }) {
            // T: tofu, R: red ball, W: white ball

            // g=0 (RTRT...RT)
            {
                constexpr int g = 0;
                const mint val = pd[f][g];
                // W
                dp[0][0] += val;
                // R
                dp[1][1] += val;
            }
            // g=1 (RTRT...TR)
            {
                constexpr int g = 1;
                const mint val = pd[f][g];
                // W
                dp[0][1] += val;
                // TR
                mint weightR = f ? 1 : x; // if f=0 then vertex (x,_) has degree of 1
                dp[1][1] += val * weightR;
                // TW
                mint weightW = weightR * (x + 1); // vertex (x+1,_) has degree of 1
                dp[0][0] += val * weightW;
            }
        }
        dp.swap(pd);

        if (x % 2 == 0) {
            // level x/2+1
            ans *= pd[0][1] + pd[1][1];
        }
    }
    // level n
    for (int x = 1; x <= 2 * n - 1; ++x) {
        ans *= x;
    }

    std::cout << ans.val() << std::endl;
}