#include<stdio.h>
int main()
{
    int a;
    scanf("%d", &a);
    if(a % 2 == 0 || a <= 0)
    {
        printf("Invalid Input");
        return 0;
    }
    for(int i = a; i >= 1; i -= 2)
    {
        int spaces = (a - i) / 2;
        for(int s = 0; s < spaces; s++)
        {
            printf(" ");
        }
        for (int j = 0; j < i; j++ )
    }
         printf("*");
    {
    printf("\n");
    }
    return 0;
}