#include <iostream>

using namespace std;

constexpr int Z = 998244353;

int main() {
    int n;
    cin >> n;

    int inv[n+2];
    for (int i = 1; i <= n + 1; i++) {
        inv[i] = i == 1 ? 1 : 1ll * (Z - Z / i) * inv[Z%i] % Z;
    }

    cout << 2 * inv[n+1] % Z << endl;

    return 0;
}