#include <iostream>
using namespace std;

int main() {
	int n;
    cin >> n;
    int l = 0;
    for(int i = 1; n > 0; i++)
    {
      int sum = 0, mult = 1;
      int c = i;
      while(c > 0)
      {
        sum += c % 10;
        mult *= (c % 10);
        c /= 10;
      }
      if(sum == mult) n--;
      l = i;
    }
    cout << l;
	return 0;
}