#include <bits/stdc++.h>
using namespace std;
int main(){
  vector<bool> b(110000, true);
  for (int i = 2; i <= 100000; i++){
    for (int j = i; j < 110000; j += i){
      b[j] = false;
    }
  }
  vector<long long> p;
  for (int i = 100000; i < 110000; i++){
    if (b[i]){
      p.push_back(i);
      if (p.size() >= 10){
        break;
      }
    }
  }
  set<long long> A;
  A.insert(1);
  for (long long i : p){
    for (long long j : p){
      A.insert(i * j);
    }
  }
  vector<long long> B;
  for (long long i : A){
    B.push_back(i);
  }
  int N;
  cin >> N;
  cout << B[N - 1] << endl;
}