Basics Exam 20 December 2014

Problem_4___Text_Bombardment

using System;
using System.IO;
using System.Linq;

namespace Problem_4___Text_Bombardment
{
    class TextBombardment
    {
        static void Main(string[] args)
        {
            Stream inStream = Console.OpenStandardInput(2000);
            Console.SetIn(new StreamReader(inStream, Console.InputEncoding, false, 2000));

            string text = Console.ReadLine();
            int columns = int.Parse(Console.ReadLine());
            int[] targets = GetTargets();            
            int rows = text.Length / columns;
            rows = text.Length % columns > 0 ? rows += 1 : rows;
            char[,] table = GetTable(rows, columns, text);
            BombardTable(targets, table);                                         

            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < columns; col++)
                {
                    Console.Write(table[row, col]);
                }
            }

            Console.WriteLine();
        }

        private static void BombardTable(int[] targets, char[,] table)
        {
            bool destroy = true;

            for (int i = 0; i < targets.Length; i++)
            {
                int col = targets[i];

                for (int row = 0; row < table.GetLength(0); row++)
                {
                    if (table[row, col] != ' ')
                    {
                        destroy = false;
                    }

                    if (table[row, col] != ' ')
                    {
                        table[row, col] = ' ';
                    }
                    else
                    {
                        if (!destroy)
                        {
                            break;
                        }
                    }
                }

                destroy = true;
            }
        }

        private static char[,] GetTable(int rows, int columns, string text)
        {
            char[,] table = new char[rows, columns];
            int idx = 0;

            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < columns; col++)
                {
                    if (idx < text.Length)
                    {
                        table[row, col] = text[idx];
                        idx++;
                    }
                    else
                    {
                        table[row, col] = ' ';
                    }
                }
            }

            return table;
        }

        private static int[] GetTargets()
        {
            int[] numbers = Console
                .ReadLine()
                .Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
                .Select(item => int.Parse(item))
                .ToArray();

            return numbers;
        }
    }
}