An inverted hollow star pyramid is a pattern where the first row contains stars across the entire width, while the following rows contain stars only at the boundaries. The remaining positions are filled with spaces, creating a hollow structure that narrows toward the bottom.
- The number of leading spaces increases by one after every row.
- The number of positions decreases by two in each successive row.
Illustration
Input:
R = 5
Output:
******
* *
* *
* *
*
For R = 10, the pattern becomes:
***********
* *
* *
* *
* *
* *
* *
* *