// editor1
#include<stdio.h>
int main(){
    int n,i,j,spaces;
    scanf("%d",&n);
    if(n<= || n>10 || n%2 ==10){
        printf("Inavalid input");
        return 0;
    }
for(i=n; >=1; =2){
    spaces = (n-i) / 2;
forj=0