#include <bits/stdc++.h>
using namespace std;
int sum(long long int k) {
  long long int sum = 0;
  while (k != 0) {
    sum += k % 10;
    k = k / 10;
  }
  if (sum == 10)
    return 1;
  else
    return 0;
}
int main() {
  ios::sync_with_stdio(false);
  int k;
  cin >> k;
  long long int c = 1;
  int count = 0;
  while (1) {
    if (sum(c)) {
      count++;
    }
    if (count == k) break;
    c += 9;
  }
  cout << c << endl;
  return 0;
}
