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

#define rep(i, a, b) for (ll i = a; i < b; i++)
using ll = long long;

int main(){
    ll n;
    cin >> n;
    ll mod = 998244353, ans = 0;
    rep(i, 0, n - 1) ans = (ans + (n - 1 - i) * 2) % mod; 
    cout << ans << endl;
}