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3093: Numbers Joke

Memory Limit：256 MB Time Limit：2.000 S
Judge Style：Text Compare Creator：
Submit：0 Solved：0
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Description

time limit per test
2 seconds
memory limit per test
64 megabytes
input
standard input
output
standard output
Input

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

Output

Output a single integer.

Example
Input
3
Output
27