#ifdef LOCAL
#include <local.hpp>
#else
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2")
#include <bits/stdc++.h>
#define debug(...) ((void)0)
#define postprocess(...) ((void)0)
#endif

#include <atcoder/modint.hpp>
using mint = atcoder::modint998244353;

using namespace std;
using ll = long long;
using ld = long double;

void solve([[maybe_unused]] int test) {
    int n;
    cin >> n;

    vector<mint> fib(1010);
    fib[0] = 0;
    fib[1] = 1;
    fib[2] = 1;
    for (int i = 3; i <= 1000; i++) {
        fib[i] = fib[i - 1] + fib[i - 2];
    }

    cout << fib[n].val() << endl;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++) {
        solve(i);
    }

    postprocess();
}