#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int INF = 1e9 + 10;
const ll INFL = 4e18;

#include <atcoder/math>
#include <atcoder/modint>
using mint = atcoder::modint998244353;

int main() {
    ll N;
    cin >> N;

    mint ans = 0;
    for (int j = 1; j <= N; j++) {
        // i:j~N
        ans += atcoder::floor_sum(N - j + 1, j, 1, j);
    }

    cout << ans.val() << endl;
}