#include <bits/stdc++.h>

#include <atcoder/modint>
using namespace std;
using mint = atcoder::modint998244353;
void fast_io() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
}

int main() {
    fast_io();
    int n;
    cin >> n;
    vector<mint> fib(10000);
    fib[1] = fib[2] = 1;
    for (int i = 3; i <= n; i++) {
        fib[i] = fib[i - 1] + fib[i - 2];
    }
    cout << fib[n].val() << endl;
}