#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#ifdef LOCAL
#include <debug.hpp>
#else
#define debug(...)
#endif

ll naive(ll N) {
    // 1e17 以下の iwi 数を全探索
    string pre, suf, s1, s2;
    for (ll i = 1e4;; i++) {
        pre = to_string(i);
        suf = pre;
        reverse(suf.begin(), suf.end());
        s1 = pre + suf + '9';
        s2 = pre + suf.substr(1) + '9';
        ll n1 = stoll(s1), n2 = stoll(s2);
        if (n1 > 1e15 && n2 > 1e15) break;
        if (n1 % N == 0) return n1;
        if (n2 % N == 0) return n2;
    }
    assert(false);
    return 0;
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(20);
    ll N;
    cin >> N;
    cout << naive(N) << '\n';
}