import java.util.*; 

class CheckerBoard {
  public static void main(String[] args) {
    int size = Integer.parseInt(args[0]); 
    int[][] matrix = new int[size][size];
    for (int i = 0; i < matrix.length; i++) {
      for (int j = 0; j < matrix[i].length; j++) {
        if ((i + j) % 2 == 0) { // i%2 == 0 && j%2 == 0 || i%2 == 1 && j%2 == 1) {
          matrix[i][j] = 0; 
        } else {
          matrix[i][j] = 1; 
        } 
      } 
    } 
    for (int[] row : matrix) 
      System.out.println( Arrays.toString(row) );
  } 
}