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