#include <bits/stdc++.h>
using namespace std;
int k;
long long ans[10009];
bool chk(long long n) {
  int m = 0;
  while (n) {
    m += (n % 10);
    n /= 10;
    if (m > 10) return 0;
  }
  return (m == 10);
}
int main() {
  cin >> k;
  ans[0] = 19;
  for (int i = 1; i <= 10000; i++) {
    ans[i] = ans[i - 1] + 9;
    while (!chk(ans[i])) ans[i] += 9;
  }
  cout << ans[k - 1];
  return 0;
}
