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;
int read() {
  int num = 0;
  int flg = 1;
  char c = getchar();
  while (!isdigit(c)) {
    if (c == '-') {
      flg = -1;
    }
    c = getchar();
  }
  while (isdigit(c)) {
    num = (num << 1) + (num << 3) + (c ^ 48);
    c = getchar();
  }
  return num * flg;
}
int k[] = {15, 14, 12, 13, 8, 9, 10, 11, 0, 1, 2, 3, 4, 5, 6, 7};
int main() { return 0 & printf("%d", k[read()]); }