using System;
using System.Collections.Generic;

public class Program
{
	public static void Main()
	{
		// 4 2
		// expected [1, 2, 9] with sum 12;
		List<int> list = new List<int>() { 1, 2, 2, 4, 2, 2, 2, 9 };
		detonateBomb(list, 4, 2);

		// 9 3
		// expected [1, 4] with sum 5;
		list = new List<int>() { 1, 4, 4, 2, 8, 9, 1 };
		detonateBomb(list, 9, 3);

		// 7 1
		// expected [1, 2, 3] with sum 6;
		list = new List<int>() { 1, 7, 7, 1, 2, 3 };
		detonateBomb(list, 7, 1);

		// 2 1
		// expected [1, 1, 1, 1] with sum 4;
		list = new List<int>() { 1, 1, 2, 1, 1, 1, 2, 1, 1, 1 };
		detonateBomb(list, 2, 1);
	}

	public static void detonateBomb(List<int> list, int specialNumber, int power)
	{
		printTheList(list);
		Console.WriteLine("Special number: " + specialNumber + ", power: " + power);

		// 1, 2, 2, 4, 2, 2, 2, 9 - 8.count
		for (int index = 0; index < list.Count; index++)
		{

			if (specialNumber == list[index])
			{
				// define the lower border
				int lowerBorder = index - power;
				if (lowerBorder < 0)
				{
					lowerBorder = 0;
				}

				// define the upper border
				int upperBorder = index + power;
				if (upperBorder >= list.Count)
				{
					upperBorder = list.Count - 1;
				}

				int numberOfElementsToRemove = upperBorder - lowerBorder;

				// remove the elements on the left, detonate the bomb and
				// remove the elements on the right
				// less than or equal to the number, since the last element should be removed inclusive
				for (int i = 0; i <= numberOfElementsToRemove; i++)
				{
					list.RemoveAt(lowerBorder);
				}
			}
		}

		printTheListAndTheSum(list);
	}

	public static void printTheList(List<int> list)
	{
		Console.Write("[");

		for (int i = 0; i < list.Count; i++)
		{
			Console.Write(list[i]);

			if (i < list.Count - 1)
			{
				Console.Write(", ");
			}
		}

		Console.WriteLine("]");
	}

	public static void printTheListAndTheSum(List<int> list)
	{
		printTheList(list);

		int sum = 0;

		for (int i = 0; i < list.Count; i++)
		{
			sum += list[i];
		}

		Console.WriteLine("The sum is " + sum + "\n");
	}
}