

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 b[31] = {0,   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};
int main() {
  int n;
  scanf("%d", &n);
  printf("%d", b[n]);
  return 0;
}
