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