#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;   }   