CardGame

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

namespace CardGame
{
    class Program
    {
        static void Main(string[] args)
        {
            //You start from the beginning of both hands.

            List<int> firstDeck = Console.ReadLine()
                                         .Split(" ", StringSplitOptions.RemoveEmptyEntries)
                                         .Select(int.Parse)
                                         .ToList();
            List<int> secondDeck = Console.ReadLine()
                                         .Split(" ", StringSplitOptions.RemoveEmptyEntries)
                                         .Select(int.Parse)
                                         .ToList();

            //Compare the cards from the first deck to the cards from the second deck.
            //The player, who has the bigger card, takes both cards and
            //puts them at the back of his hand ‐ the second
            //player’s card is last, and the first person’s card (the winning one)
            //is before it (second to last) and the player with
            //the smaller card must remove the card from his deck.

            while (true)
            {
                if (firstDeck.Count == 0 || secondDeck.Count == 0)
                {
                    break;
                }

                if (firstDeck.First() > secondDeck.First())
                {
                    firstDeck.Add(firstDeck[0]);
                    firstDeck.Remove(firstDeck[0]);
                    firstDeck.Add(secondDeck[0]);
                    secondDeck.Remove(secondDeck[0]);
                }
                else if (firstDeck[0] < secondDeck[0])
                {
                    secondDeck.Add(secondDeck[0]);
                    secondDeck.Remove(secondDeck[0]);
                    secondDeck.Add(firstDeck[0]);
                    firstDeck.Remove(firstDeck[0]);
                }

                //If both players’ cards have the same values ‐ no one wins, and
                //the two cards must be removed from the decks.

                else if (firstDeck[0] == secondDeck[0])
                {
                    firstDeck.Remove(firstDeck[0]);
                    secondDeck.Remove(secondDeck[0]);
                }

            }

            if (firstDeck.Count == 0)
            {
                Console.WriteLine($"Second player wins! Sum: {secondDeck.Sum()}");
            }
            else
            {
                Console.WriteLine($"First player wins! Sum: {firstDeck.Sum()}");
            }
            //The game is over, when one of the decks is left without any cards.
            //You have to print the winner on the console and the sum of the left cards:
            //"{First/Second} player wins! Sum:{sum}".



        }
    }
}