#include<stdio.h>
int main(){
    int n;
    scanf("%d",&n);
    
    if(n<=0 || n>10 || n%2==0){
        printf("Invalid input");
        return 0;
    }
    for (int row=n; row>=1; row-=2){
        int spaces=(n-row)/2;
        for (int s=0; s<spaces; s++){
            printf(" ");
            for (int star=0; star<row; star++)
            printf("*");
        printf("\n");
        }
    retrun 0;
}