Snowman

namespace _16_First_exam_prep
{
    using System;
    using System.Linq;

    public class Startup
    {
        public static void Main()
        {
            // Problem 2 - Snowman

            int[] inputArr = Console.ReadLine().Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Select(e => int.Parse(e)).ToArray();

            while (inputArr.Length != 1)
            {
                bool[] checkAttackers = new bool[inputArr.Length];
                checkAttackers = checkAttackers.Select(e => true).ToArray();

                for (int i = 0; i < inputArr.Length; i++)
                {
                    if (checkAttackers.Where(e => e).ToArray().Length == 1)
                    {
                        break;
                    }

                    if (!checkAttackers[i])
                    {
                        continue;
                    }

                    int attacker = i;
                    int target = inputArr[i];
                    int winner = new int();

                    if (target >= inputArr.Length)
                    {
                        target %= inputArr.Length;
                    }

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

                    if (diff == 0)
                    {
                        Console.WriteLine($"{attacker} performed harakiri");

                        checkAttackers[target] = false;
                        continue;
                    }
                    else if (diff % 2 == 0)
                    {
                        winner = attacker;

                        // Loser
                        checkAttackers[target] = false;
                    }
                    else if (diff % 2 == 1)
                    {
                        winner = target;

                        // Loser
                        checkAttackers[attacker] = false;
                    }

                    Console.WriteLine($"{attacker} x {target} -> {winner} wins");
                }

                inputArr = inputArr.Where((e, i) => checkAttackers[i]).ToArray();
            }
        }
    }
}