using System;
using System.Numerics;

namespace MultidimensionArrays
{
    class Program
    {
        static void Main(string[] args)
        {
            //int n = int.Parse(Console.ReadLine());
            int[,] matrix = new int[4,4]
                {
                     {1, 2, 3, 4 },
                     {5, 6, 7, 8 },
                     {9, 10, 11, 12 },
                     {13, 14, 15 ,16 }
                };
            //int[,] matrix = new int[n, n];

            //for (int i = 0; i < matrix.GetLength(0); i++)
            //{
            //    for (int j = 0; j < matrix.GetLength(1); j++)
            //    {
            //        matrix[i, j] = int.Parse(Console.ReadLine());
            //    }
            //}
            int rows = 0;

            int counter = 0;

            for (int row = matrix.GetLength(0) - 1; row >= 0; row--)
            {
                rows = row;
                for (int col = 0; col <= counter; col++)
                {

                    Console.Write(matrix[rows, col] + " ");
                    rows++;
                }
                Console.WriteLine();
                counter++;
            }

            int cols = 1;
            int counter2 = 0;
            for (int i = matrix.GetLength(0) - 2; i >= 0; i--)
            {
                for (int row = 0; row <= i; row++)
                {
                        Console.Write(matrix[row, cols] + " ");
                        cols++;
                }
                Console.WriteLine();
                counter2++;
                cols = 1 + counter2;
            }
        }
    }
}