Problem: 

Input

The input contains a single integer a (0 ≤ a ≤ 35).

Output

Output a single integer.

Examples

Input

3


Output

8


Input

10


Output

1024

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
template <typename T>
inline void read(register T &a) {
  register char c = getchar();
  register T x = 0, f = 1;
  while (!isdigit(c)) {
    if (c == '-') f = -1;
    c = getchar();
  }
  while (isdigit(c)) {
    x = (x << 1) + (x << 3) + c - '0';
    c = getchar();
  }
  a = x * f;
}
int ans[30] = {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},
    pos;
int main() {
  read(pos);
  printf("%d\n", ans[pos - 1]);
  return 0;
}