train/ exercise lists

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

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

            int maxWagon = int.Parse(Console.ReadLine());

            List<string> input = Console.ReadLine().Split().ToList();

            while (input[0] != "end")
            {
                if (input.Count == 2)
                {
                    train.Add(int.Parse(input[1]));
                }
                else
                {
                    for (int i = 0; i < train.Count; i++)
                    {
                        int inputNumber = int.Parse(input[0]);

                        if (inputNumber + train[i] <= maxWagon)
                        {
                            train[i] = inputNumber + train[i];
                            break;
                        }
                        else
                        {
                            continue;
                        }
                    }
                }

                input = Console.ReadLine().Split().ToList();
            }

            Console.WriteLine(string.Join(" ", train));
        }
    }
}