Problems
Good number
Good number
The integer is "Good" if it consists of only odd digits. For example the number $157953$ is good, and the number $2452117$ is not good. Find out how many $n$ - digit good numbers exist.
\InputFile
One positive integer $n~(1 \le n \le 20)$.
\OutputFile
Print the number of good integers.
Input example #1
4
Output example #1
625