#include <bits/stdc++.h>

using namespace std;

const int NMAX = 1e5 + 7;
const int mod = 998244353;
int fact[NMAX];

int lgpow(int b, int e) {
    int ret = 1;
    while(e) {
        if(e & 1) ret = (1LL * ret * b) % mod;
        b = (1LL * b * b) % mod;

        e /= 2;
    }
    return ret;
}

int main() {
    fact[0] = 1;
    for(int i = 1; i < NMAX; i++) fact[i] = (1LL * fact[i - 1] * i) % mod;

    int n; cin >> n;
    int ans = 0;
    for(int k = 2; k <= n - 2; k++) {
        int upper = fact[n];
        int lower = 1;
        lower = (1LL * lower * (n - 1)) % mod;
        lower = (1LL * lower * fact[k - 2]) % mod;
        lower = (1LL * lower * fact[n - k - 2]) % mod;
        lower = (1LL * lower * k) % mod;
        lower = (1LL * lower * (n - k)) % mod;

        int cnt = (1LL * upper * lgpow(lower, mod - 2)) % mod;
        ans = (1LL * ans + 1LL * cnt * cnt) % mod;
    }

    cout << ans << endl;
}