Problem Definition

Write a c Program to print the below pattern based on the input for number of rows from the user.

Example

Here the input given by the user is 10.

*   
*   *   
*   *   *   
*   *   *   *   
*   *   *   *   *   
*   *   *   *   *   *   
*   *   *   *   *   *   *   
*   *   *   *   *   *   *   *   
*   *   *   *   *   *   *   *   *   
*   *   *   *   *   *   *   *   *   *

Constraints

0 < rows < 25

Test Data

Sample Input 0

-1

Sample Output 0

Invalid Input

Sample Input 1

25

Sample Output 1

Invalid Input

Sample Input 2

5

Sample Output 2

*   
*   *   
*   *   *   
*   *   *   *   
*   *   *   *   *