Hollow Square of Stars
Print a square outline of stars with a hollow interior.
Input format
One line with a single integer N (the size of the pattern).
Output format
Print an N by N square whose border cells are * and whose interior cells are spaces.
Constraints
- Values fit in a 64-bit signed integer
- Trailing whitespace and a trailing newline are ignored by the judge
Read from stdin, write to stdout. Sample cases below show the exact format.
Sample cases
Example 1
Input
4Expected output
****
* *
* *
****Example 2
Input
5Expected output
*****
* *
* *
* *
*****