#include <iostream>
using namespace std;
int main()
{
int len,spLen = 1;//spaceLen
cin >> len;
for(int i=0;i < len*2-1; i++){
for(int j=0; j < len - spLen; j++){
cout<<"*";
}
for(int j=0; j < spLen*2-1; j++){
cout<<" ";
}
for(int j=0; j < len - spLen; j++){
cout<<"*";
}
cout << endl;
if(i<len-1){++spLen;}
else{--spLen;}
}
return 0;
}
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