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