#include<iostream> #include<cstring> #include<cstdio> using namespace std; int main(){ int i,j,n; cin >> n; for(i=1;i<=n; i++){ for(j=1;j<=n-i;j++) cout<<" "; for(j=1;j<=2*i-1; j++) cout<<"*"; cout<<endl; } for(i=n-1;i>=1; i--){ for(j=n-i;j>=1;j--) cout<<" "; for(j=2*i-1;j>=1; j--) cout<<"*"; cout<<endl; } return 0; }