03. Moving Target

using System;

namespace MovingTarget
{
    class Program
    {
        static void Main(string[] args)
        {
            var targets = Console.ReadLine().Split(' ').Select(int.Parse).ToList();

            string input;

            while ((input = Console.ReadLine()) != "End")
            {
                var tokens = input.Split(' ');
                string command = tokens[0];
                int index = int.Parse(tokens[1]);
                int value = int.Parse(tokens[2]);

                if (command == "Shoot")
                {
                    if (index >= 0 && index < targets.Count)
                    {
                        targets[index] -= value;
                        if (targets[index] <= 0)
                        {
                            targets.RemoveAt(index);
                        }
                    }
                }
                else if (command == "Add")
                {
                    if (index >= 0 && index < targets.Count)
                    {
                        targets.Insert(index, value);
                    }
                    else
                    {
                        Console.WriteLine("Invalid placement!");
                    }
                }
                else if (command == "Strike")
                {
                    if (index - value >= 0 && index + value < targets.Count)
                    {
                        targets.RemoveRange(index - value, value * 2 + 1);
                    }
                    else
                    {
                        Console.WriteLine("Strike missed!");
                    }
                }
            }

            Console.WriteLine(String.Join('|', targets));
        }
    }
}