tijie

#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <algorithm>
#include <set>
#include <iostream>
#include <stack>
#include<queue>
#include <vector>
#include <map>
#include <iomanip>
using namespace std;
int n,a[100001];
int main(){
    //freopen("hello.in","r",stdin);
    //freopen("hello.out","w",stdout);
    cin>>n;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n-i;j++){
            cout<<" ";
        }
        for(int j=1;j<=2*i-1;j++){
            if(j==1||j==2*i-1)cout<<"*";
            else cout<<" ";
        }
        cout<<endl;
    }
    for(int i=2;i<=n;i++){
        for(int j=1;j<i;j++){
            cout<<" ";
        }
        for(int j=1;j<=2*n-i-i+1;j++){
        	if(j==1||j==2*n-i-i+1){
        		cout<<"*";
			}
            else cout<<" ";
        }
        cout<<endl;
    }
    //fclose(stdin);
    //fclose(stdout);
    return 0;
}