Adv2018/D21.1/Program.cs

using D19._1;
using System;
using System.Collections.Generic;
using System.IO;

namespace D21._1
{
    class ManagedComputer : Computer
    {
        public new uint Ip => base.Ip;
        public uint GetRegister(int id) => CPU.Registers[id];
        public void RefreshRegisters(uint value)
        {
            CPU.RefreshRegisters();
            CPU.Registers[0] = value;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length < 1) return;
            if (File.Exists(args[0]) == false) return;

            var pc = new ManagedComputer();
            var file = File.OpenText(args[0]);
            pc.LoadProgram(file);
            file.Close();

            pc.DumpRegisters();

            Console.WriteLine("==== EXECUTING PROGRAM ===");

            bool continu = true;
            uint first = 0, last = 0;
            HashSet<uint> all = new HashSet<uint>();
            for (uint i = 0; continu ; i++)
            {
                pc.RefreshRegisters(i);

                do
                {
                    continu = pc.ExecInstruction();

                    if (pc.Ip == 29 && first == 0)
                        first = pc.GetRegister(1);
                    if (pc.Ip == 29)
                    {
                        var l = pc.GetRegister(1);
                        if (all.Add(l) == true && l < Int32.MaxValue) last = l;
                        else continu = false;
                    }

                } while (continu);
            }

            Console.WriteLine("====== PROGRAM ENDED =====");
            pc.DumpRegisters();
            Console.WriteLine($"Part 1 answer is : {first}");
            Console.WriteLine($"Part 2 answer is : {last}");
        }
    }
}