#include <iostream>
using namespace std;
int main(){
int n, matr[100][100];
cin >> n;
for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
if(i%2) matr[i][j]=j%2;
else matr[i][j]=!(j%2);
}
}
for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
cout << matr[i][j];
}
cout << endl;
}
}