Prob3Lovers

using System;
using System.Collections.Generic;
using System.Linq;

class ProblemLover3
{
    static void Main()
    {
        // filling matrix
        int[] rowCol = Console.ReadLine()
            .Split(new char[] { ' ', ',' }, StringSplitOptions.RemoveEmptyEntries)
            .Select(r => int.Parse(r))
            .ToArray();

        int x = rowCol[0];
        int y = rowCol[1];

        int[,] matrix = new int[x, y];

        int p = 0;
        int k = 3;
        matrix[rowCol[0] - 1, 0] = p;

        for (int i = x - 1; i >= 0; i--)
        {
            for (int j = 0; j < y; j++)
            {
                matrix[i, j] = p;
                p += 3;
            }
            p = k;
            k += 3;
        }

        // reading instruction lines
        int n = int.Parse(Console.ReadLine());
        List<string> lines = new List<string>();

        for (int i = 0; i < n; i++)
        {
            lines.Add(Console.ReadLine());
        }

        // solution
        int currentX = x - 1;
        int currentY = 0;
        int sum = 0;

        for (int i = 0; i < n; i++)
        {
            string direction = lines[i].Substring(0, 2);
            for (int j = 0; j < (lines[i][lines[i].Length - 1] - '0'); j++)
            {
                sum += matrix[currentX, currentY];
                matrix[currentX, currentY] = 0;

                if (direction == "RU" || direction == "UR")
                {
                    currentX--;
                    currentY++;
                    if (currentX < 0)
                    {
                        currentX = 0;
                    }
                    if (currentY >= y)
                    {
                        currentY = y - 1;
                    }
                }
                if (direction == "LU" || direction == "UL")
                {
                    currentX--;
                    currentY--;
                    if (currentX < 0)
                    {
                        currentX = 0;
                    }
                    if (currentY < 0)
                    {
                        currentY = 0;
                    }
                }
                if (direction == "DL" || direction == "LD")
                {
                    currentX++;
                    currentY++;
                    if (currentX >= x)
                    {
                        currentX = x - 1;
                    }
                    if (currentY >= y)
                    {
                        currentY = y - 1;
                    }
                }
                if (direction == "RD" || direction == "DR")
                {
                    currentX++;
                    currentY--;
                    if (currentX >= x)
                    {
                        currentX = x - 1;
                    }
                    {
                        currentY = 0;
                    }
                }
            }
        }
        Console.WriteLine(sum);
    }
}