#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int N;
  cin >> N;
  vector<int64_t> cands;
  cands.emplace_back(1);
  for (int64_t a = 100001; a < 100010; a++) {
    for (int64_t b = 100001; b < 100010; b++) {
      cands.emplace_back(a * b);
    }
  }
  sort(cands.begin(), cands.end());
  cout << cands[N - 1] << '\n';
  return 0;
}