#include <bits/stdc++.h>

using i64 = long long;

constexpr int P = 998244353;

int power(int a, int b) {
    int res = 1;
    for (; b; b /= 2, a = 1LL * a * a % P) {
        if (b % 2) {
            res = 1LL * res * a % P;
        }
    }
    return res;
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int n;
    std::cin >> n;
    
    std::vector<int> fac(n + 1), invfac(n + 1);
    fac[0] = 1;
    for (int i = 1; i <= n; i++) {
        fac[i] = 1LL * fac[i - 1] * i % P;
    }
    invfac[n] = power(fac[n], P - 2);
    for (int i = n; i; i--) {
        invfac[i - 1] = 1LL * invfac[i] * i % P;
    }
    
    int ans = 0;
    for (int i = 1; n - i >= i - 1; i++) {
        ans = (ans + 1LL * fac[n - i] * invfac[n - i - (i - 1)] % P * fac[n - i]) % P;
    }
    std::cout << ans << "\n";
    
    return 0;
}