#include <atcoder/all>
#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
typedef long long ll;
using namespace atcoder;
using namespace std;
using mint = modint998244353;

template <typename T>
struct mat {
    vector<vector<T>> M;
    int H = 0, W = 0;

    mat(int h, int w) {
        this->H = h;
        this->W = w;
        M = vector<vector<T>>(h, vector<T>(w));
    }

    mat(vector<vector<T>> &v) {
        this->H = v.size();
        this->W = v[0].size();
        M = v;
    }

    vector<T> operator[](int i) const { return M[i]; }
    vector<T> &operator[](int i) { return M[i]; }

    mat operator*(const mat &a) {
        mat res(H, a.W);
        rep(i, H) rep(k, W) rep(j, a.W) res[i][j] += M[i][k] * a[k][j];
        return res;
    }

    mat pow(ll n) {
        mat res(H, W);
        rep(i, H) res[i][i] = 1;
        mat a = *this;
        while (n) {
            if (n & 1) res = res * a;
            a = a * a;
            n >>= 1;
        }
        return res;
    }
};

int main() {
    cin.tie(0)->sync_with_stdio(0);

    ll N;
    cin >> N;

    vector<vector<mint>> A = {{1, 1}, {1, 0}};
    mat<mint> a(A);
    mat<mint> b = a.pow(N);
    cout << (b[0][0] - 1).val() << "\n";

    return 0;
}