using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _04.SequenceInMatrix
{
    class SequenceInMatrix
    {
        static void Main()
        {
            int[,] matrix = new int[,]
           {
                {4, 5, 6, 7},
                {5, 6, 9, 9},
                {8, 8, 8, 8},
                {3, 3, 3, 3},
                {2, 5, 2, 2},
                {1, 4, 1, 1},
                {0, 0, 7, 0}
           };
            DiagonalDownRight(matrix);
            Console.WriteLine();
            DiagonalRight(matrix);
            Console.WriteLine();
            DiagonalUp(matrix);
            Console.WriteLine();
            DiagonalLeft(matrix);
            Console.WriteLine();
            DiagonalDownLeft(matrix);
            Console.WriteLine();
        }

        private static void DiagonalDownRight(int[,] matrix)
        {
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                int j1 = 0;
                int j2 = i;
                while (j1 < matrix.GetLength(1) && j2 < matrix.GetLength(0))
                {
                    Console.Write(matrix[j2, j1] + " ");
                    j1++;
                    j2++;
                }
                Console.WriteLine();
            }
        }
        private static void DiagonalUp(int[,] matrix)
        {
            for (int i = matrix.GetLength(0); i >= 0; i--)
            {
                int j1 = 0;
                int j2 = i;
                while (j1 < matrix.GetLength(1) && j2 < matrix.GetLength(0))
                {
                    Console.Write(matrix[j2, j1] + " ");
                    j1++;
                    j2++;
                }
                Console.WriteLine();
            }
        }
        private static void DiagonalRight(int[,] matrix)
        {
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                int j1 = i;
                int j2 = 0;
                while (j1 < matrix.GetLength(1) && j2 < matrix.GetLength(0))
                {
                    Console.Write(matrix[j2, j1] + " ");
                    j1++;
                    j2++;
                }
                Console.WriteLine();
            }
        }
        private static void DiagonalLeft(int[,] matrix)
        {
            for (int i = matrix.GetLength(1) - 1; i >= 0; i--)
            {
                int j1 = 0;
                int j2 = i;
                while (j1 >= 0 && j2 >= 0)
                {
                    Console.Write(matrix[j1, j2] + " ");
                    j1++;
                    j2--;
                }
                Console.WriteLine();
            }
        }
        private static void DiagonalDownLeft(int[,] matrix)
        {
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                int j1 = i;
                int j2 = matrix.GetLength(1) - 1;
                while (j1 < matrix.GetLength(0) && j2 >= 0)
                {
                    Console.Write(matrix[j1, j2] + " ");
                    j1++;
                    j2--;
                }
                Console.WriteLine();
            }
        }
    }
}