#include <bits/stdc++.h>
using namespace std;
using ll = long long;

random_device rd;
mt19937 seed(rd());

constexpr int N = 1e7 + 10;
constexpr int P = 998244353;
ll fac[N], ifac[N];

ll power (ll a, ll b) {
    ll ret = 1;
    while (b) {
        if (b & 1) ret = ret * a % P;
        a = a * a % P;
        b >>= 1;
    }
    return ret;
}
void Init() {
    fac[0] = 1;
    int n = 1e7;
    for (int i = 1; i <= n; i++) {
        fac[i] = fac[i - 1] * i % P;
    }
    ifac[n] = power(fac[n], P - 2) % P;
    for (int i = n; i >= 1; i--) {
        ifac[i - 1] = ifac[i] * i % P;
    }
}

ll C (int n, int m) {
    if (n < m || n < 0 || m < 0) return 0ll;
    return fac[n] * ifac[n - m] % P * ifac[m] % P;
}

void solve() {
    Init();
    int n;
    cin >> n;
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        ll tmp = 1;
        tmp = tmp * C(n - i, i - 1) % P;
        tmp = tmp * fac[i - 1] % P;
        tmp = tmp * fac[n - i] % P;
        ans = (ans + tmp) % P;
    }
    cout << ans << '\n';
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t = 1;
    // cin >> t;
    while (t--) solve();
#ifdef DEBUG
    cout << "\n----------------\n";
    cout << fixed << setprecision(6);
    cout << "Times: " << 1.0 * clock() / CLOCKS_PER_SEC << "s\n";
#endif
}