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