#include<iostream>
using namespace std;

int main(){
    int N;
    cin>>N;
    
    if(N<=0){
        cout<<"Invalid Input"
        return 0;
    }
    for(int i=0;i<N;i++){
        for(int j=0;j<N;j++){
            if(i==j||i+j==N-1)
               cout<<"X";
            else
               cout<<"0";
        }
        cout<<endl;
    }
    return 0;
}