#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
// --------------------------------------------------------
#define FOR(i,l,r) for (ll i = (l); i < (r); ++i)
#define RFOR(i,l,r) for (ll i = (r)-1; (l) <= i; --i)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define ALL(c) (c).begin(), (c).end()
#define RALL(c) (c).rbegin(), (c).rend()
#define SORT(c) sort(ALL(c))
#define RSORT(c) sort(RALL(c))
#define MIN(c) *min_element(ALL(c))
#define MAX(c) *max_element(ALL(c))
#define COUNT(c,v) count(ALL(c),(v))
#define SZ(c) ((ll)(c).size())
#define BIT(b,i) (((b)>>(i)) & 1)
#define PCNT(b) ((ll)__builtin_popcountll(b))
#define P0(i) (((i) & 1) == 0)
#define P1(i) (((i) & 1) == 1)
#define LB(c,v) distance((c).begin(), lower_bound(ALL(c), (v)))
#define UB(c,v) distance((c).begin(), upper_bound(ALL(c), (v)))
#define UQ(c) do { SORT(c); (c).erase(unique(ALL(c)), (c).end()); } while (0)
#define END(...) do { print(__VA_ARGS__); exit(0); } while (0)
#define elif else if
template<class T> using PQ_max = priority_queue<T>;
template<class T> using PQ_min = priority_queue<T, vector<T>, greater<T>>;
constexpr int inf = (1 << 30) - 1;   // 1073741824 - 1
constexpr ll INF = (1LL << 62) - 1;  // 4611686018427387904 - 1
#ifdef _LOCAL
    #define debug_bar cerr << "----------------------------------------\n";
    #define debug_header cerr << "[" << __FUNCTION__ << ":" << __LINE__ << "] "
    #define debug(...) do { debug_header; cerr << #__VA_ARGS__ << " = "; view(__VA_ARGS__); cerr << '\n'; } while (0)
    #define debug2(vv) do { debug_header; cerr << #vv << " = [\n"; view2d(vv); cerr << "  ]\n"; } while (0)
    #define debug3(vvv) do { debug_header; cerr << #vvv << " = [\n"; view3d(vvv); cerr << "  ]\n"; } while (0)
    void view() {}
    void view(const int& a) { if (abs(a) == inf) { cerr << "+-"[signbit(a)] << "inf"; } else { cerr << a; } }
    void view(const ll& a) { if (abs(a) == INF) { cerr << "+-"[signbit(a)] << "INF"; } else { cerr << a; } }
    template<class T> void view(const T& a) { cerr << a; }
    template<class P1, class P2> void view(const pair<P1, P2>& a) { cerr << "("; view(a.first); cerr << ", "; view(a.second); cerr << ")"; }
    template<class T1, class T2, class T3> void view(const tuple<T1, T2, T3>& a) { cerr << "("; view(get<0>(a)); cerr << ", "; view(get<1>(a)); cerr << ", "; view(get<2>(a)); cerr << ")"; }
    template<class T1, class T2, class T3, class T4> void view(const tuple<T1, T2, T3, T4>& a) { cerr << "("; view(get<0>(a)); cerr << ", "; view(get<1>(a)); cerr << ", "; view(get<2>(a)); cerr << ", "; view(get<3>(a)); cerr << ")"; }
    template<class T1, class T2, class T3, class T4, class T5> void view(const tuple<T1, T2, T3, T4, T5>& a) { cerr << "("; view(get<0>(a)); cerr << ", "; view(get<1>(a)); cerr << ", "; view(get<2>(a)); cerr << ", "; view(get<3>(a)); cerr << ", "; view(get<4>(a)); cerr << ")"; }
    template<class T> void view(const vector<T>& v){ cerr << "["; for (int i = 0; i < (int)v.size(); i++) { if (i) { cerr << ", "; } view(v[i]); } cerr << "]"; }
    template<class T> void view(const vector<vector<T>>& vv){ cerr << "["; for (int i = 0; i < (int)vv.size(); i++) { if (i) { cerr << ", "; } view(vv[i]); } cerr << "]"; }
    template<class K, class V> void view(const map<K, V>& mp){ cerr << "["; for (auto it = mp.begin(); it != mp.end(); it++) { if (it != mp.begin()) { cerr << ", "; } cerr << "("; view(it->first); cerr << ", "; view(it->second); cerr << ")"; } cerr << "]"; }
    template<class K, class V> void view(const multimap<K, V>& mmp){ cerr << "["; for (auto it = mmp.begin(); it != mmp.end(); it++) { if (it != mmp.begin()) { cerr << ", "; } cerr << "("; view(it->first); cerr << ", "; view(it->second); cerr << ")"; } cerr << "]"; }
    template<class T> void view(const set<T>& s){ cerr << "["; for (auto it = s.begin(); it != s.end(); it++) { if (it != s.begin()) { cerr << ", "; } view(*it); } cerr << "]"; }
    template<class T> void view(const multiset<T>& ms){ cerr << "["; for (auto it = ms.begin(); it != ms.end(); it++) { if (it != ms.begin()) { cerr << ", "; } view(*it); } cerr << "]"; }
    template<class T> void view(const deque<T>& d){ cerr << "(front)<-["; for (auto it = d.begin(); it != d.end(); it++) { if (it != d.begin()) { cerr << ", "; } view(*it); } cerr << "]"; }
    template<class T> void view(stack<T> s){ vector<T> v; while (not s.empty()) { v.push_back(s.top()); s.pop(); } reverse(v.begin(), v.end()); view(v); cerr << "->(top)"; }
    template<class T> void view(queue<T> q){ vector<T> v; while (not q.empty()) { v.push_back(q.front()); q.pop(); } cerr << "(front)<-"; view(v); }
    template<class T> void view(PQ_max<T> pq){ vector<T> v; while (not pq.empty()) { v.push_back(pq.top()); pq.pop(); } cerr << "(top)<-"; view(v); }
    template<class T> void view(PQ_min<T> pq){ vector<T> v; while (not pq.empty()) { v.push_back(pq.top()); pq.pop(); } cerr << "(top)<-"; view(v); }
    template<class T> void view2d(const vector<vector<T>>& vv){ for (int i = 0; i < (int)vv.size(); i++) { cerr << "    "; view(vv[i]); cerr << ",\n"; } }
    template<class T> void view3d(const vector<vector<vector<T>>>& vvv) { for (int i = 0; i < (int)vvv.size(); i++) { for (int j = 0; j < (int)vvv[i].size(); j++) { cerr << "    " << " ["[j == 0]; view(vvv[i][j]); if (j == (int)vvv[i].size() - 1) { cerr << "]"; } cerr << ",\n"; } if (i < (int)vvv.size() - 1) { cerr << "\n"; } } }
    template<class T, class... Ts> void view(const T& a, const Ts&... b) { view(a); cerr << ", "; view(b...); }
#else
    #define cerr if (false) cerr
    #define debug_bar
    #define debug(...)
    #define debug2(vv)
    #define debug3(vvv)
#endif
template<class... T> void input(T&... a) { (cin >> ... >> a); }
void print() { cout << '\n'; }
template<class T> void print(const T& a) { cout << a << '\n'; }
template<class T, class... Ts> void print(const T& a, const Ts&... b) { cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; }
template<class T> void cout_line(const vector<T>& ans, int l, int r) { for (int i = l; i < r; i++) { if (i != l) { cout << ' '; } cout << ans[i]; } cout << '\n'; }
template<class T> bool chmin(T& a, const T b) { if (b < a) { a = b; return 1; } return 0; }
template<class T> bool chmax(T& a, const T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> T SUM(const vector<T>& A) { return accumulate(ALL(A), T(0)); }
template<class T> vector<T> cumsum(const vector<T>& A, bool offset = false) { int N = A.size(); vector<T> S(N+1, 0); for (int i = 0; i < N; i++) { S[i+1] = S[i] + A[i]; } if (not offset) { S.erase(S.begin()); } return S; }
template<class T> string to_binary(T x, int B) { string s; while (x) { s += ('0' + (x & 1)); x >>= 1; } while ((int)s.size() < B) { s += '0'; } reverse(s.begin(), s.end()); return s; }
template<class F> ll binary_search(const F& is_ok, ll ok, ll ng) { while (abs(ok - ng) > 1) { ll m = (ok + ng) / 2; (is_ok(m) ? ok : ng) = m; } return ok; }
template<class F> double binary_search_real(const F& is_ok, double ok, double ng, int iter = 90) { for (int i = 0; i < iter; i++) { double m = (ok + ng) / 2; (is_ok(m) ? ok : ng) = m; } return ok; }
ll min(int a, ll b) { return min((ll)a, b); }
ll min(ll a, int b) { return min(a, (ll)b); }
ll max(int a, ll b) { return max((ll)a, b); }
ll max(ll a, int b) { return max(a, (ll)b); }
ll mod(ll x, ll m) { assert(m != 0); return (x % m + m) % m; }
ll ceil(ll a, ll b) { if (b < 0) { return ceil(-a, -b); } assert(b > 0); return (a < 0 ? a / b : (a + b - 1) / b); }
ll floor(ll a, ll b) { if (b < 0) { return floor(-a, -b); } assert(b > 0); return (a > 0 ? a / b : (a - b + 1) / b); }
ll powint(ll x, ll n) { assert(n >= 0); if (n == 0) { return 1; }; ll res = powint(x, n>>1); res *= res; if (n & 1) { res *= x; } return res; }
pair<ll,ll> divmod(ll a, ll b) { assert(b != 0); ll q = floor(a, b); return make_pair(q, a - q * b); }
ll bitlen(ll b) { if (b <= 0) { return 0; } return (64LL - __builtin_clzll(b)); }
ll digit_len(ll n) { assert(n >= 0); if (n == 0) { return 1; } ll sum = 0; while (n > 0) { sum++; n /= 10; } return sum; }
ll digit_sum(ll n) { assert(n >= 0); ll sum = 0; while (n > 0) { sum += n % 10; n /= 10; } return sum; }
ll digit_prod(ll n) { assert(n >= 0); if (n == 0) { return 0; } ll prod = 1; while (n > 0) { prod *= n % 10; n /= 10; } return prod; }
ll xor_sum(ll x) { assert(0 <= x); switch (x % 4) { case 0: return x; case 1: return 1; case 2: return x ^ 1; case 3: return 0; } assert(false); }
string toupper(const string& S) { string T(S); for (int i = 0; i < (int)T.size(); i++) { T[i] = toupper(T[i]); } return T; }
string tolower(const string& S) { string T(S); for (int i = 0; i < (int)T.size(); i++) { T[i] = tolower(T[i]); } return T; }
int a2i(const char& c) { assert(islower(c)); return (c - 'a'); }
int A2i(const char& c) { assert(isupper(c)); return (c - 'A'); }
int d2i(const char& d) { assert(isdigit(d)); return (d - '0'); }
char i2a(const int& i) { assert(0 <= i && i < 26); return ('a' + i); }
char i2A(const int& i) { assert(0 <= i && i < 26); return ('A' + i); }
char i2d(const int& i) { assert(0 <= i && i <= 9); return ('0' + i); }
using P = pair<ll,ll>;
using VP = vector<P>;
using VVP = vector<VP>;
using VS = vector<string>;
using VVS = vector<VS>;
using VI = vector<int>;
using VVI = vector<VI>;
using VVVI = vector<VVI>;
using VLL = vector<ll>;
using VVLL = vector<VLL>;
using VVVLL = vector<VVLL>;
using VB = vector<bool>;
using VVB = vector<VB>;
using VVVB = vector<VVB>;
using VD = vector<double>;
using VVD = vector<VD>;
using VVVD = vector<VVD>;
using VLD = vector<ld>;
using VVLD = vector<VLD>;
using VVVLD = vector<VVLD>;
const ld EPS = 1e-10;
const ld PI  = acosl(-1.0);
// --------------------------------------------------------
// #include <atcoder/all>
// using namespace atcoder;


#include <atcoder/modint>
using namespace atcoder;

// constexpr ll MOD = 1000003;
// using mint = modint;
// mint::set_mod(MOD);  // main() 内に書く

// using mint = modint1000000007;
using mint = modint998244353;

using VM = vector<mint>;
using VVM = vector<VM>;
using VVVM = vector<VVM>;
using VVVVM = vector<VVVM>;

template<int M> istream &operator>>(istream &is, static_modint<M> &m) { ll v; is >> v; m = v; return is; }
template<int M> istream &operator>>(istream &is, dynamic_modint<M> &m) { ll v; is >> v; m = v; return is; }
template<int M> ostream &operator<<(ostream &os, const static_modint<M> &m) { return os << m.val(); }
template<int M> ostream &operator<<(ostream &os, const dynamic_modint<M> &m) { return os << m.val(); }

struct combination {
  public:
    combination() : combination(1) {}
    combination(int n) : N(1), fact_(2,0), ifact_(2,0), inv_(2,0) {
        M = mint().mod();
        assert(0 < n && n < M);

        fact_[0] = fact_[1] = 1;
        ifact_[0] = ifact_[1] = 1;
        inv_[1] = 1;

        if (N < n) { build(n); }
    }

    mint P(int n, int k) {
        if (N < n) { build(n); }
        if (n < 0 || k < 0 || n < k) { return 0; }
        return fact_[n] * ifact_[n-k];
    }
    mint C(int n, int k) {
        if (N < n) { build(n); }
        if (n < 0 || k < 0 || n < k) { return 0; }
        return fact_[n] * ifact_[n-k] * ifact_[k];
    }
    mint H(int n, int k) {
        if (n == 0 && k == 0) { return 1; }
        if (n < 0 || k < 0) { return 0; }
        return C(n + k - 1, k);
    }
    mint fact(int n) {
        if (N < n) { build(n); }
        if (n < 0) { return 0; }
        return fact_[n];
    }
    mint ifact(int n) {
        if (N < n) { build(n); }
        if (n < 0) { return 0; }
        return ifact_[n];
    }
    mint inv(int n) {
        if (N < n) { build(n); }
        if (n < 0) { return 0; }
        return inv_[n];
    }
    mint P_naive(ll n, int k) const noexcept {
        if (n < 0 || k < 0 || n < k) { return 0; }
        mint res = 1;
        for (int i = 1; i <= k; i++) { res *= (n - i + 1); }
        return res;
    }
    mint C_naive(ll n, int k) const noexcept {
        if (n < 0 || k < 0 || n < k) { return 0; }
        if (k > n - k) { k = n - k; }
        mint nume = 1, deno = 1;
        for (int i = 1; i <= k; i++) { nume *= (n - i + 1); deno *= i; }
        return nume / deno;
    }
    mint H_naive(ll n, int k) const noexcept {
        if (n == 0 && k == 0) { return 1; }
        if (n < 0 || k < 0) { return 0; }
        return C_naive(n + k - 1, k);
    }

  private:
    int N;
    int M;  // mod
    vector<mint> fact_, ifact_, inv_;

    void build(int N_new) {
        assert(N < N_new);
        fact_.resize(N_new + 1);
        ifact_.resize(N_new + 1);
        inv_.resize(N_new + 1);
        for (int i = N + 1; i <= N_new; i++) {
            fact_[i] = fact_[i - 1] * i;
            inv_[i] = -inv_[M % i] * (M / i);
            ifact_[i] = ifact_[i - 1] * inv_[i];
        }
        N = N_new;
    }
};




//  行列累乗
template<class T>
struct matrix_exponential {
  public:
    matrix_exponential(int d) : d(d) {}

    // 単位行列を返す
    //   - (d^2)
    vector<vector<T>> id() {
        vector<vector<T>> E(d, vector<T>(d, 0));
        for (int i = 0; i < d; i++) { E[i][i] = 1; }
        return E;
    }

    // 行列積を求める
    //   - (d^3)
    vector<vector<T>> mat_mul(const vector<vector<T>>& A, const vector<vector<T>>& B) {
        vector<vector<T>> C(d, vector<T>(d, 0));
        for (int i = 0; i < d; i++) {
            for (int k = 0; k < d; k++) {
                for (int j = 0; j < d; j++) {
                    C[i][j] += A[i][k] * B[k][j];
                }
            }
        }
        return C;
    }

    // d x d の正方行列 A に対して A^n を求める
    //   - O(d^3 log n)
    vector<vector<T>> solve(vector<vector<T>> A, ll n) {
        auto B = id();

        // e.g.) n = 11, B = A^(2^3) + A^(2^1) + A^(2^0)  (11 = 2^3 + 2^1 + 2^0)
        while (n > 0) {
            if (n & 1) { B = mat_mul(B, A); }  // 欲しいタイミングで拾う
            A = mat_mul(A, A);
            n >>= 1;
        }
        return B;
    }

  private:
    int d;
};


int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(15);

    ll N; input(N);

    VVM A = {{1, 1},
             {1, 0}};
    matrix_exponential<mint> mat_exp(A.size());
    auto An = mat_exp.solve(A, N-1);

    mint ans = An[0][0] + An[1][0] - 1;
    print(ans);

    return 0;
}