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 PYTHON3):

Solution:
a = list(map(int, input().split()))
if sum (a) % 2 == 0:
            print(0)
else:
            print(1)