/*

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

--*/
#include<stdio.h>
void  main()
{
    int num,r,j,s;
    printf("Enter no of rows: ");
    scanf("%d", &num);
    printf("\n*\n");
    for(r=1; r<=num; r++)
        {
            printf("*");
            for(s=1; s<r; s++)
                printf(" ");
            printf("*\n");
        }
    for(j=1; j<=num+2; j++)
        printf("*");
}