#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  constexpr array<ll, 10> p = { 100003, 100019, 100043, 100049, 100057, 100069, 100103, 100109, 100129, 100151 };
  vector<ll> arr;
  arr.push_back(1);
  for (ll x : p) {
    for (ll y : p) {
      arr.push_back(x * y);
    }
  }
  sort(arr.begin(), arr.end());
  arr.erase(unique(arr.begin(), arr.end()), arr.end());
  int n;
  cin >> n;
  assert(arr.size() > n);
  cout << arr[n - 1] << '\n';
  return 0;
}