Snowmen

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

namespace Snowmen_01_18
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> snowmen = Console.ReadLine().Split().Select(int.Parse).ToList();
            List<int> losers = new List<int>();

            while (snowmen.Count > 1)
            {
                for (int index = 0; index < snowmen.Count; index++)
                {
                    if (snowmen.Count - losers.Count == 1)
                    {
                        break;
                    }

                    int attacker = index;
                    int target = snowmen[index] % snowmen.Count;

                    if (losers.Contains(attacker))
                    {
                        continue;
                    }

                    int difference = Math.Abs(attacker - target);

                    if (difference == 0)
                    {
                        Console.WriteLine($"{attacker} performed harakiri");
                        losers.Add(attacker);
                        losers = losers.Distinct().ToList();
                    }
                    else if (difference % 2 == 0)
                    {
                        Console.WriteLine($"{attacker} x {target} -> {attacker} wins");
                        losers.Add(target);
                        losers = losers.Distinct().ToList();
                    }
                    else if (difference % 2 != 0)
                    {
                        Console.WriteLine($"{attacker} x {target} -> {target} wins");
                        losers.Add(attacker);
                        losers = losers.Distinct().ToList();
                    }
                }

                losers.Sort();
                losers.Reverse();

                foreach (int index in losers)
                {
                    snowmen.RemoveAt(index);
                }

                losers.Clear();
            }
        }
    }
}