shoot for the win

using System;
using System.Linq;
using System.Collections.Generic;
using System.Numerics;
using System.Threading;

namespace exampreparation
{
    class exam
    {
        static void Main(string[] args)
        {
            List<int> targets = Console.ReadLine().Split().Select(int.Parse).ToList();

            string command = Console.ReadLine();

            int count = 0;

            while (command != "End")
            {
                int hit = int.Parse(command);

                if (hit >= 0 && hit < targets.Count)
                {
                    if (targets[hit] != -1)
                    {
                        int temp = targets[hit];
                        targets[hit] = -1;
                        count++;

                        for (int i = 0; i < targets.Count; i++)
                        {
                            if (targets[i] != -1)
                            {
                                if (targets[i] > temp)
                                {
                                    targets[i] -= temp;
                                }
                                else
                                {
                                    targets[i] += temp;
                                }
                            }
                        }
                    }
                }

                command = Console.ReadLine();
            }

            Console.WriteLine($"Shot targets: {count} -> {string.Join(" ", targets)}");
        }

    }
}