#include <bits/stdc++.h>

using namespace std;

#define cctie ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define all(x) x.begin(), x.end()
#define ALL(x) x.begin() + 1, x.end()

using i64 = long long;
using i128 = __int128;

constexpr int P = 998244353, N = 10000010;
int fact[N], finv[N];

int ksm(int a, int b = P - 2, const int p = P) {
    int ret = 1 % p;
    while (b) {
        if (b & 1) ret = 1LL * ret * a % p;
        b >>= 1;
        a = 1LL * a * a % p;
    }
    return ret;
}
int inv(int x) {
    return ksm(x);
}
int comb(int a, int b) {
    if (a < b) {
        return 0;
    }
    return 1LL * fact[a] * finv[b] % P * finv[a - b] % P;
}

void prework() {
    fact[0] = finv[0] = 1;
    for (int i = 1; i <= N - 10; i++) {
        fact[i] = 1LL * fact[i - 1] * i % P;
    }
    finv[N - 10] = inv(fact[N - 10]);
    for (int i = N - 10 - 1; i >= 1; i--) {
        finv[i] = 1LL * finv[i + 1] * (i + 1) % P;
    }
}

int main() {
    cctie;

    prework();

    int n;
    cin >> n;

    int ans = 0;
    for (int x = 1; x <= n; x++) {
        ans = (ans + 1LL * comb(n - x, x - 1) * fact[x - 1] % P * fact[n - x] % P) % P;
    }

    cout << ans << '\n';

    return 0;
}