#include <iostream>
using namespace std:
int main(){
    int n;
    cin >> n;
    if (n <=0 || n>=10){
        cout<<"Invalid input";
        return 0;
    }
    
    for(int i=0; i<n;++i){
        for(int j=0; j<n;++j){
            if((i+j)% 2 == 0)
            cout << 1 <<" ";
            else
            cout << 0 <<" ";
        }
        cout<<endl;
    }
    return 0;
}