// editor1
#include<stdio.h>
int main()
{
    int num;
    if(scanf("%d",&n) !=1)
    return 0;
     
    if(n <=0||n% 2 == 0)
    {
        printf("Invalid Input");
        return 0;
    }
    int rows =(n+1)/2;
    for (int i=0;i< rows;++i)
    {
        for (int s=0;s<i;++s)
        putchar('');
        int stars =n-2*i;
        for (int j= 0; j< stars; ++j)putchar('*');
        if(i !=rows - 1)
        putchar('\n');
    }
    return 0;
}