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