#include <stdio.h>

int main () {
  int n = 0;
  
  int res = 0;
  
  char ans[2000001] = "";
  
  int a = 1;
  int b = 0;
  int c = 0;
  
  res = scanf("%d", &n);
  n--;
  
  while (n%36 >= (a*(17-a))/2) {
    a++;
  }
  b = a+1+n%36-((a-1)*(18-a))/2;
  c = n/36;
  
  ans[0] = '0'+((char)a);
  for (int i = 0; i <= c; i++) {
    ans[i+1] = '0'+((char)b);
  }
  ans[c+2] = '\0';
  
  printf("%s\n", ans);
  return 0;
}