GrainsOfSands - MidExam-27Aug18

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

namespace _02GrainsOfSands
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> sands = Console.ReadLine().Split().Select(int.Parse).ToList();

            while (true)
            {
                string command = Console.ReadLine();

                if (command == "Mort")
                {
                    break;
                }

                string[] tokens = command.Split();

                string action = tokens[0];

                if (action == "Add")
                {
                    int value = int.Parse(tokens[1]);

                    sands.Add(value);
                }
                else if (action == "Remove")
                {
                    int value = int.Parse(tokens[1]);

                    if (sands.Contains(value))
                    {
                        sands.Remove(value);
                    }
                    else
                    {
                        int index = value;
                        if (index>=0 && index<=sands.Count-1)
                        {
                            sands.RemoveAt(index);
                        }
                    }
                }
                else if (action == "Replace")
                {
                    int value = int.Parse(tokens[1]);
                    int replacement = int.Parse(tokens[2]);

                    for (int i = 0; i < sands.Count; i++)
                    {
                        int currNum = sands[i];

                        if (currNum == value)
                        {
                            sands[i] = replacement;
                            break;
                        }

                    }
                }
                else if (action == "Increase")
                {
                    int value = int.Parse(tokens[1]);

                    bool isFound = false;

                    for (int i = 0; i < sands.Count; i++)
                    {
                        int currNum = sands[i];

                        if (currNum>=value)
                        {
                            isFound = true;

                            for (int j = 0; j < sands.Count; j++)
                            {
                                sands[j] += currNum;
                            }

                            break;
                        }

                    }

                    if (isFound == false)
                    {
                        int valueToIncrease = sands[sands.Count - 1];

                        for (int i = 0; i < sands.Count; i++)
                        {
                            sands[i] += valueToIncrease;
                        }
                    }
                }
                else if (action == "Collapse")
                {
                    int value = int.Parse(tokens[1]);

                    sands = sands.Where(x => x >= value).ToList();
                }
            }
            Console.WriteLine(string.Join(" ",sands));
        }
    }
}