#include <stdio.h>
int main 
{
    int n;
    printf("Enter positive odd integer:");
    scanf("%d", &n);
    if(n <=0 || n % 2 == 0)
    {
        printf ("please Enter a positive odd integer.\n");
        return 1;
    }
    for (int i = n; i >= 1; i -= 2)
    {
        int spaces = (n-i)/2;
        for (int j=0; j< spaces;j++)
        printf("";
        for (int k=0;k<i; k++)
        printf("*");
        printf("\n");
    }
    return 0;
}