/**
 * Write a description of class LatinSquare here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class LatinSquare
{
    // returns true iff n is in the xth row of a
    // e.g. inRow(4, {{3, 5}, {3, 6, 4}, {2}}, 1) = true, 
    // e.g. inRow(4, {{3, 5}, {3, 6, 4}, {2}}, 2) = false
    public static boolean inRow(int n, int[][]a, int x)
    {
        // TODO
        return true;
    }

    // returns true iff n is in the xth column of a
    // e.g. inColumn(4, {{3, 5}, {3, 6, 4}, {2}}, 2) = true, 
    // e.g. inColumn(4, {{3, 5}, {3, 6, 4}, {2}}, 1) = false
    public static boolean inColumn(int n, int[][]a, int x)
    {
        // TODO
        return true;
    }

    // returns true iff a is a Latin Square containing the numbers 1..n 
    // a must be a square of side n, and every row and every column must be a permutation of 1..n
    // http://en.wikipedia.org/wiki/Latin_square
    public static boolean isLatin(int[][] a)
    {
        // TODO
        return true;
    }

    // CHALLENGE (optional): 
    // returns true iff a is legal, complete Sudoku board 
    // http://en.wikipedia.org/wiki/Sudoku
    public static boolean isSudoku(int[][] a)
    {
        // TODO
        return true;
    }
}