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 PYTHON):

Solution:
ans = [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, 648, 654, 663, 666, 690, 706, 728, 729, 762, 778, 825, 852, 861,
    895, 913, 915, 922, 958, 985, 1086, 1111, 1165]

print ans[int(raw_input()) - 1]