#include <iostream>
using namespace std;
int main() {
int n;
cin>>n;
for(int i=0;i<n;i++){
for(int j=0;j<i;j++){
for(int k=0;k<j;k++){
if(k==n/2-j)cout<<"*";
if(k==n/2+j)cout<<"*";
else cout<<" ";
}
cout<<endl;
}
}
return 0;
}
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