#include <bits/stdc++.h>
using namespace std;
long long int cal(long long int n) {
  long long int ans = 0;
  while (n) {
    ans += n % 10;
    n /= 10;
  }
  return ans;
}
void solve() {
  long long int t = 1;
  while (t--) {
    long long int n;
    cin >> n;
    long long int num = 1;
    while (n) {
      if (cal(num) == 10) n--;
      num++;
    }
    cout << num - 1 << endl;
  }
  return;
}
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  solve();
  return 0;
}
