

Input

The input contains a single integer a (1 ≤ a ≤ 30).

Output

Output a single integer.

Example

Input

3


Output

27
#include <bits/stdc++.h>
int main(void) {
  int arr[] = {4,   22,  27,  58,  85,  94,   121,  166, 202, 265, 274,
               319, 346, 355, 378, 382, 391,  438,  454, 483, 517, 526,
               535, 562, 576, 588, 627, 634,  636,  645, 648, 654, 663,
               666, 690, 706, 728, 729, 762,  778,  825, 852, 861, 895,
               913, 915, 922, 958, 985, 1086, 1111, 1165};
  int a = 0;
  scanf("%d", &a);
  printf("%d\n", arr[a - 1]);
  return 0;
}
