#include <bits/stdc++.h>
using namespace std;
bool valid(long long int num) {
  int sum = 0;
  while (num) {
    sum += num % 10;
    num /= 10;
  }
  if (sum == 10) return 1;
  return 0;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int n;
  cin >> n;
  long long int first = 19;
  int cnt = 1;
  while (cnt < n) {
    first++;
    if (valid(first)) cnt++;
  }
  cout << first << endl;
  return 0;
}
