#include <bits/stdc++.h>

#include <atcoder/all>
using namespace std;
using i32 = int;
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
#define FAST_IO                \
  ios::sync_with_stdio(false); \
  cin.tie(0);
const i64 INF = 1001001001001001001;
using Modint = atcoder::static_modint<998244353>;

tuple<i64, i64, int> func(i64 x) {
  i64 res = 0;
  auto y = x;
  while (y > 0) {
    res *= 10;
    res += y % 10;
    y /= 10;
  }

  int len = to_string(x).size();
  i64 f = 1;
  for (int i = 0; i < len; i++) {
    f *= 10;
  }
  return {res, f, len};
}

tuple<i64, int, int> g(i64 v, i64 m) {
  auto [u, f, len] = func(v);

  i64 g = f % m;
  for (int i = len; i < 1000; i ++) {
    i64 x = (u * g + v) * 10 + 9;
    if (i + len >= 12 && x % m == 0) {
      return {u, i, len};
    }
    g = (g * 10) % m;
  }
  return {-1, -1, -1};
}

int main() {
  FAST_IO

  i64 N;
  cin >> N;

  for (int v = 1; v <= 100000; v++) {
    if (v % 10 == 0) continue;

    auto [u, i, len] = g(v, N);
    if (u != -1) {
      string s = "";
      s += to_string(u);
      for (int j = 0; j < i - len; j++) {
        s += "0";
      }
      s += to_string(v);
      s += "9";
      cout << s << endl;
      break;
    }
  }
}