```cpp

include[HTML_REMOVED]

include[HTML_REMOVED]

using namespace std;

int main(){
int n;
while(cin>>n,n){//当输入不为零 循环
for(int i=0;i<n;i){
for(int j=0;j<n;j){
int up=i+1,left=j+1,down=n-i,right=n-j;
cout<<min(min(up,down),min(left,right))<<’ ‘;//内部是比完的较小值，也用min(,)
}
cout<<endl;
}

cout<<endl;
}
return 0;

}