# include<iostream> # include<cmath> using namespace std; int main(){ int a; cin>>a; for(int i = 1; i <= 2*a-1; i++){ for(int b = abs(a-i); b >= 1; b--)cout<<" "; for(int b = 1; b <= (a-abs(a-i))*2-1; b++)cout<<"*"; cout<<endl; } return 0; }