

Input

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

Output

Output a single integer.

Example

Input

3


Output

27
a = [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]
 
x = int(raw_input())

print a[x - 1]