Jedi Galaxy

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

public class Program
{
	public static void Main()
	{
	  	int[] props = Console.ReadLine().Split().Select(int.Parse).ToArray();

		int rows = props[0];
		int cols = props[1];

		int[][]jagged = new int[rows][];

		int num = 0;

		for(int row=0; row<rows; row++)
		{
			jagged[row] = new int[cols];

			for(int col=0; col<cols; col++)
			{
				jagged[row][col] = num;
				num++;
			}
		}

		long ivoSum = 0L;

		while (true)
		{
			string command = Console.ReadLine();

			if (command == "Let the Force be with you")
			{
				break;
			}

			int[] ivoCoords = command.Split().Select(int.Parse).ToArray();
			int[] evilCoords = Console.ReadLine().Split().Select(int.Parse).ToArray();

			int ivoRow = ivoCoords[0];
			int ivoCol = ivoCoords[1];

			int evilRow = evilCoords[0];
			int evilCol = evilCoords[1];

			while (evilRow>=0 && evilCol>=0)
			{
				if(evilRow>=0 && evilCol>=0 && evilRow<rows && evilCol<cols)
				{
					jagged[evilRow][evilCol]=0;
				}

				evilRow--;
				evilCol--;
			}

			while (ivoRow>=0 && ivoCol<cols)
			{
				if(ivoRow>=0 && ivoCol>=0 && ivoRow<rows && ivoCol<cols)
				{
					ivoSum += jagged[ivoRow][ivoCol];
				}

				ivoRow--;
				ivoCol++;
			}
		}

		Console.WriteLine(ivoSum);
	}
}