using System;

namespace C_Projects
{
    class Program
    {
        static readonly int imageWidthAndHeight = 4;

        static void Main(string[] args)
        {
            int[,] image = new int [,] {
                {1,2,3,4},
                {2,3,5,7},
                {4,7,9,9},
                {9,5,3,2}
            };

            char[,] solution = Solve(image);

            for (int i = 0; i < imageWidthAndHeight; i++)
            {

                for (int j = 0; j < imageWidthAndHeight; j++)
                {
                    Console.Write(solution[i, j]);
                    if (j == imageWidthAndHeight - 1)
                        Console.WriteLine();
                }
            }
        }

        static char[,] Solve(int[,] image)
        {
            char[,] arrows = new char[imageWidthAndHeight, imageWidthAndHeight];
            int currentValue, maxValue;
            int leftValue, rightValue, bottomValue, topValue;

            for (int row = 0; row < imageWidthAndHeight; row++)
            {
                for (int col = 0; col < imageWidthAndHeight; col++)
                {
                    currentValue = image[row, col];
                    leftValue = rightValue = topValue = bottomValue = -1; //lower than 0

                    if (col != 0)
                        leftValue = image[row, col - 1];

                    if (col != imageWidthAndHeight - 1)
                        rightValue = image[row, col + 1];

                    if (row != imageWidthAndHeight - 1)
                        bottomValue = image[row + 1, col];

                    if (row != 0)
                        topValue = image[row - 1, col];

                    arrows[row, col] = 'o';
                    maxValue = currentValue;

                    if(currentValue < leftValue)
                    {
                        arrows[row, col] = '<';
                        maxValue = leftValue;
                    }

                    if(topValue > maxValue)
                    {
                        arrows[row, col] = '^';
                        maxValue = topValue;
                    }

                    if(rightValue > maxValue)
                    {
                        arrows[row, col] = '>';
                        maxValue = rightValue;
                    }

                    if (bottomValue > maxValue)
                    {
                        arrows[row, col] = 'v';
                    }
                }
            }

            return arrows;
        }
    }
}