#include <bits/stdc++.h>
#include "atcoder/all"
#define debug cout << "OK" << endl;
template<typename T>
inline bool chmax(T& a, const T b) { if (a < b) { a = b; return true; } return false; }
template<typename T>
inline bool chmin(T& a, const T b) { if (a > b) { a = b; return true; } return false; }
inline int Code(char c) {
	if ('A' <= c and c <= 'Z')return (int)(c - 'A');
	if ('a' <= c and c <= 'z')return (int)(c - 'a');
	if ('0' <= c and c <= '9')return (int)(c - '0');
	assert(false);
}
using namespace std;
using namespace atcoder;
#define int long long
constexpr int MOD = 998244353;
constexpr int INF = (1LL << 62);
using minit = modint998244353;

template<typename T>
ostream& operator << (ostream& st, const vector<T> &v) {
	for (const T value : v) {
		st << value << " ";
	}
	return st;
}
template<typename T>
istream& operator >> (istream& st, vector<T>& v) {
	for (T &value : v) {
		st >> value;
	}
	return st;
}

class Matrix {
public:
	int mod = MOD;
	Matrix() {}
	Matrix(int x) { mat.resize(x); }
	Matrix(int x, int y) { mat.resize(x, vector<int>(y)); }

	vector<vector<int>> mat;
	void Set(int x, int y, int value) {
		mat[x][y] = value;
		return;
	}

	void operator = (const Matrix& m) {
		mat = m.mat;
		return;
	}
	void operator = (const vector<vector<int>>& v) {
		mat = v;
		return;
	}
	bool operator == (const Matrix& m) {
		return mat == m.mat;
	}
	Matrix operator + (Matrix& m) {
		assert(mat.size() == m.mat.size());
		assert(mat[0].size() == m.mat[0].size());
		Matrix m2(mat.size(), mat[0].size());
		for (int i = 0; i < mat.size(); i++) {
			for (int j = 0; j < mat[0].size(); j++) {
				m2.mat[i][j] = mat[i][j] + m.mat[i][j];
				m2.mat[i][j] %= mod;
			}
		}
		return m2;
	}
	Matrix operator - (Matrix& m) {
		assert(mat.size() == m.mat.size());
		assert(mat[0].size() == m.mat[0].size());
		Matrix m2(mat.size(), mat[0].size());
		for (int i = 0; i < mat.size(); i++) {
			for (int j = 0; j < mat[0].size(); j++) {
				m2.mat[i][j] = mat[i][j] - m.mat[i][j];
				m2.mat[i][j] += mod;
				m2.mat[i][j] %= mod;
			}
		}
		return m2;
	}
	Matrix operator * (Matrix& m) {
		assert(mat[0].size() == m.mat.size());
		Matrix m2(mat.size(), m.mat[0].size());
		for (int i = 0; i < mat.size(); i++) {
			for (int j = 0; j < m.mat[0].size(); j++) {
				for (int k = 0; k < m.mat.size(); k++) {
					m2.mat[i][j] += (mat[i][k] * m.mat[k][j]) % mod;
					m2.mat[i][j] %= mod;
				}
			}
		}
		return m2;
	}
	Matrix pow(int a) {
		bool inited = false;
		Matrix ans;
		Matrix base = (*this);
		for (int i = 0; i < 63; i++) {
			if (a & (1ll << i)) {
				if (!inited) {
					ans = base;
					inited = true;
				}
				else ans = ans * base;
			}
			base = base * base;
		}
		return ans;
	}
};
ostream& operator << (ostream& st, const Matrix& m) {
	for (const vector<int> v : m.mat) {
		for (const int a : v) {
			cout << a << " ";
		}
		cout << endl;
	}
	return st;
}

void solve() {
	Matrix base(2, 2);
	base = { {1,1},{1,0} };
	Matrix ot(2, 1);
	vector<vector<int>> p = { {1},{1} };
	ot = p;
	
	int N;
	cin >> N;
	if (N == 1) {
		cout << 0 << endl;
		return;
	}
	Matrix ans = base.pow(N) * ot;
	cout << ans.mat[1][0] - 1 << endl;
}
signed main() {
	int T = 1;
	// cin >> T;
	for (int i = 0; i < T; i++)
		solve();
	return 0;
}