784_A. Numbers Joke


Input

The input contains a single integer a (1 ≤ a ≤ 30).

Output

Output a single integer.

Example

Input

3


Output

27
```python
ls = [0, 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, ]
print(ls[int(input())])
```