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