AP CS A 2018 FRQ #4

public static int[] getColumn(int[][] arr2D, int c)
{
  int[] result = new int[arr2D.length];
  for(int i = 0; i < arr2D.length; i++)
  {
    result[i] = arr2D[i][c];
  }
  return result;
}

public static boolean isLatin(int[][] square)
{
  boolean firstRow = false;
  boolean eachRow = true;
  boolean eachColumn = true;

  firstRow = !(containsDuplicates(square[0]));

  int counter = 0;
  while(eachRow && counter < square[0].length)
  {
    if(!(hasAllValues(square[0], square[i])))
    {
      eachRow = false;
    }
    counter++;
  }
  counter = 0;

  while(eachColumn && counter < getColumn(square, 0))
  {
    if(!(hasAllValues(square[0], getColumn(square, i))))
    {
      eachColumn = false;
    }
  }

  return firstRow && eachRow && eachColumn;
}