#include <iostream>
#include <cassert>
#include <vector>
using namespace std;
typedef long long ll;

const ll MOD = 998244353;

struct mint
{
    int val;

    mint() : val(0) {}

    mint(long long v) : val(v)
    {
        if (abs(val) >= MOD)
        {
            val %= MOD;
        }
        if (val < 0)
        {
            val += MOD;
        }
    }

    mint &operator++()
    {
        val++;
        if (val == MOD)
        {
            val = 0;
        }
        return *this;
    }

    mint &operator--()
    {
        if (val == 0)
        {
            val = MOD;
        }
        val--;
        return *this;
    }

    mint &operator+=(const mint &x)
    {
        val += x.val;
        if (val >= MOD)
        {
            val -= MOD;
        }
        return *this;
    }

    mint &operator-=(const mint &x)
    {
        val -= x.val;
        if (val < 0)
        {
            val += MOD;
        }
        return *this;
    }

    mint &operator*=(const mint &x)
    {
        val = (int)((long long)val * x.val % MOD);
        return *this;
    }

    mint &operator/=(const mint &x)
    {
        *this *= x.inv();
        return *this;
    }

    mint operator-()
    {
        return mint() - *this;
    }

    mint pow(long long n) const
    {
        mint x = 1, r = *this;
        while (n)
        {
            if (n & 1)
            {
                x *= r;
            }
            r *= r;
            n >>= 1;
        }
        return x;
    }

    mint inv() const
    {
        return pow(MOD - 2);
    }

    friend mint operator+(const mint &x, const mint &y)
    {
        return mint(x) += y;
    }

    friend mint operator-(const mint &x, const mint &y)
    {
        return mint(x) -= y;
    }

    friend mint operator*(const mint &x, const mint &y)
    {
        return mint(x) *= y;
    }

    friend mint operator/(const mint &x, const mint &y)
    {
        return mint(x) /= y;
    }

    friend bool operator==(const mint &x, const mint &y)
    {
        return x.val == y.val;
    }

    friend bool operator!=(const mint &x, const mint &y)
    {
        return x.val != y.val;
    }

    friend std::ostream &operator<<(std::ostream &os, const mint &x)
    {
        return os << x.val;
    }

    friend std::istream &operator>>(std::istream &is, mint &x)
    {
        int v;
        is >> v;
        x = mint(v);
        return is;
    }
};

template <typename T>
struct Matrix
{
    int n, m;
    std::vector<std::vector<T>> a;

    Matrix() {}

    Matrix(int n, int m) : n(n), m(m), a(n, std::vector<T>(m)) {}

    Matrix(int n) : n(n), m(n), a(n, std::vector<T>(n)) {}

    static Matrix<T> I(int n)
    {
        Matrix<T> res(n);
        for (int i = 0; i < n; i++)
        {
            res[i][i] = 1;
        }
        return res;
    }

    Matrix<T> &operator+=(const Matrix<T> &b)
    {
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                (*this)[i][j] += b[i][j];
            }
        }
        return *this;
    }

    Matrix<T> &operator-=(const Matrix<T> &b)
    {
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                (*this)[i][j] -= b[i][j];
            }
        }
        return *this;
    }

    Matrix<T> &operator*=(const Matrix<T> &b)
    {
        assert(m == b.n);
        std::vector<std::vector<T>> c(n, std::vector<T>(b.m));
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < b.m; j++)
            {
                for (int k = 0; k < m; k++)
                {
                    c[i][j] += (*this)[i][k] * b[k][j];
                }
            }
        }
        m = b.m;
        a.swap(c);
        return *this;
    }

    Matrix<T> &operator^=(long long k)
    {
        Matrix<T> b = Matrix<T>::I(n);
        while (k)
        {
            if (k & 1)
            {
                b *= *this;
            }
            *this *= *this;
            k >>= 1;
        }
        a.swap(b.a);
        return *this;
    }

    Matrix<T> operator+(const Matrix<T> &a)
    {
        return (Matrix<T>(*this) += a);
    }

    Matrix<T> operator-(const Matrix<T> &a)
    {
        return (Matrix<T>(*this) -= a);
    }

    Matrix<T> operator*(const Matrix<T> &a)
    {
        return (Matrix<T>(*this) *= a);
    }

    Matrix<T> operator^(const Matrix<T> &a)
    {
        return (Matrix<T>(*this) ^= a);
    }

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

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

int main()
{
    ll n;
    cin >> n;
    Matrix<mint> a(2);
    a[0][0] = a[0][1] = a[1][0] = 1;
    a ^= n;
    cout << a[0][0] - 1 << endl;
}