#include<bits/stdc++.h>
#define ll long long
using namespace std;

int main(){
    int n;
    cin >> n;
    for (int i=1; i<=n; i++){
        if(i%2!=0){
            for(int i=1; i<=n; i++){
                if(i%2!=0) cout<<0;
                else cout<<1;
            }
        }else{
            for(int i=1; i<=n; i++){
                if(i%2==0) cout<<0;
                else cout<<1;
            }
        }cout<<"\n";
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll n;
int main()
{
  cin >> n;
  for (ll i = 1; i <= n; ++i)
  {
    for (ll j = 1; j <= n; ++j)
    {
      if ((i % 2) == (j % 2)) cout << "1";
      else cout << "0";
    }
    cout << '\n';
  }
}