Day 11.txt

    internal class Program
    {
        static void Main(string[] args)
        {
            string[] input = File.ReadAllLines(@"C:/Users/pette/Documents/Aoc11.txt");
            int counter = 0;
            List<Monkey> monkeyList = new List<Monkey>();
            foreach (string s in input)
            {
                switch (counter)
                {
                    case 0:
                        monkeyList.Add(new Monkey($"a{Convert.ToInt32(s[7]) - 48}"));
                        counter++;
                        break;
                    case 1:
                        string temp = s.Remove(0, 18);
                        string[] items = temp.Split(", ");
                        foreach (string x in items)
                        {
                            long item = Convert.ToInt64(x);
                            monkeyList[monkeyList.Count - 1].itemQ.Enqueue(item);
                        }
                        counter++;
                        break;
                    case 2:
                        monkeyList[monkeyList.Count - 1].operation = s.Remove(0, 23);
                        counter++;
                        break;
                    case 3:
                        monkeyList[monkeyList.Count - 1].testNr = Convert.ToInt64(s[21..]);
                        counter++;
                        break;
                    case 4:
                        monkeyList[monkeyList.Count - 1].trueMonkey = Convert.ToInt32(s[29]) - 48;
                        counter++;
                        break;
                    case 5:
                        monkeyList[monkeyList.Count - 1].falseMonkey = Convert.ToInt32(s[30]) - 48;
                        counter++;
                        break;
                    case 6:
                        counter = 0;
                        break;
                }
            }

            long superModulo = 1;
            foreach (Monkey m in monkeyList)
            {
                superModulo *= m.testNr;
            }

            // Let the monkeybusiness commence, play 20 times.
            for (int i = 0; i < 10000; i++)
            {
                foreach (Monkey m in monkeyList)
                {
                    for (int j = m.itemQ.Count; j > 0; j--)
                    {
                        // Get item from queue.
                        long temp = m.itemQ.Dequeue();
                        // Check what operation the monkey has.
                        if (m.operation[0] == '+')
                        {
                            temp += Convert.ToInt64(m.operation[2..]);
                        }
                        else if (m.operation[0] == '*')
                        {
                            if (m.operation[2..] == "old")
                            {
                                temp = temp * temp;
                            }
                            else
                            {
                                temp = temp * Convert.ToInt32(m.operation[2..]);
                            }
                        }
                        // Add one to inspections counter.
                        m.inspections++;
                        //// Round down to number divisible by three.
                        //temp -= temp % 3;
                        //// Divide by three for relief.
                        //temp /= 3;
                        // Check if stress level is divisable by monkeys test number.
                        temp %= superModulo;
                        if (temp % m.testNr == 0)
                        {
                            monkeyList[m.trueMonkey].itemQ.Enqueue(temp);
                        }
                        else
                        {
                            monkeyList[m.falseMonkey].itemQ.Enqueue(temp);
                        }
                    }
                }
            }

            foreach (Monkey m in monkeyList)
            {
                Console.WriteLine(m.inspections);
            }
            // Check for the two monkeys with most inspections.
            long highest = 0;
            long secondHighest = 0;
            foreach (Monkey m in monkeyList)
            {
                if (m.inspections > highest)
                {
                    secondHighest = highest;
                    highest = m.inspections;
                }
                else if (m.inspections > secondHighest)
                {
                    secondHighest = m.inspections;
                }
            }

            // Multiply the numbers to get the result.
            long sum = highest * secondHighest;

            Console.WriteLine(sum);

        }
    }

    public class Monkey
    {
        public string name;
        public long testNr;
        public string operation;
        public int trueMonkey;
        public int falseMonkey;
        public long inspections;
        public Queue<long> itemQ = new Queue<long>();

        public Monkey(string name)
        {
            this.name = name;
            inspections = 0;
        }
    }