#include <bits/stdc++.h>
using namespace std;
int k10(long long k) {
  long long sum = 0;
  while (k) {
    sum += k % 10;
    k /= 10;
  }
  if (sum == 10)
    return 1;
  else
    return 0;
}
int main() {
  int k;
  cin >> k;
  long long temp = 0;
  for (int i = 0; i < k;) {
    if (k10(temp)) {
      i++;
    }
    temp += 1;
  }
  cout << temp - 1 << endl;
  return 0;
}
