#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i)
#define rep(i, n) drep(i, 0, n - 1)
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define fi first
#define se second

const ll MOD = 1000000007;
const ll MOD2 = 998244353;
const ll INF = 1LL << 60;
const ll N_MAX = 2e5;

ll digit(ll x){
    ll res = 0;
    while(x){
        res++;
        x /= 10;
    }

    return res;
}

int main(){
    ll n;
    cin >> n;

    vector<ll> cnt(n, 0);
    for(ll i=1; i-digit(i) <= n-1; i++) cnt[i-digit(i)]++;

    vector<vector<ll>> dp(n+1, vector<ll>(n, 0));
    dp[0][0] = 1;
    for(ll i=1; i<=n; i++){
        for(ll j=0; j<=n-1; j++){
            for(ll k=0; k<=j; k++){
                dp[i][j] += (dp[i-1][k]*cnt[j-k])%MOD2;
                dp[i][j] %= MOD2;
            }
        }
    }

    cout << dp[n][n-1] << endl;
}