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:
import re
import math
import decimal
import bisect

def read():
	return input().strip()

# code goes here
print(int(read()) % 2)