Example #1
0
 public void ApplyGravity(Moon other)
 {
     if (other == this)
     {
         return;
     }
     if (x < other.x)
     {
         dX++;
     }
     else if (x > other.x)
     {
         dX--;
     }
     if (y < other.y)
     {
         dY++;
     }
     else if (y > other.y)
     {
         dY--;
     }
     if (z < other.z)
     {
         dZ++;
     }
     else if (z > other.z)
     {
         dZ--;
     }
 }
Example #2
0
        public override object Task1()
        {
            Moon[] moons = new Moon[input.Length];

            for (int i = 0; i < input.Length; i++)
            {
                string[] parts = input[i].Substring(1, input[i].Length - 2).Split(", ");
                moons[i] = new Moon(int.Parse(parts[0].Split('=')[1]),
                                    int.Parse(parts[1].Split('=')[1]),
                                    int.Parse(parts[2].Split('=')[1]));
            }

            for (int _ = 0; _ < 1000; _++)
            {
                SimulateStep(moons);
            }

            long energy = 0;

            for (int i = 0; i < moons.Length; i++)
            {
                energy += NRG(moons[i].Position) * NRG(moons[i].Velocity);
            }
            return(energy);
        }
Example #3
0
        static Moon[] LoadMoons(string filename)
        {
            List <Moon> moons = new();

            foreach (var line in FileIterator.Lines(filename))
            {
                var groups = line.Groups(@"<x=([-\d]+), y=([-\d]+), z=([-\d]+)>");
                var moon   = new Moon(int.Parse(groups[0]), int.Parse(groups[1]), int.Parse(groups[2]));
                moons.Add(moon);
            }

            return(moons.ToArray());
        }
Example #4
0
        private IList <Moon> ReadAndParse()
        {
            IList <string> lines = AdventUtils.ReadFileByLines(@"..\..\..\Files\Day12.txt");
            IList <Moon>   Moons = new List <Moon>();

            foreach (string line in lines)
            {
                string[] cordinates = line.Split(',');
                Moon     moon       = new Moon();
                moon.PosX = long.Parse(cordinates[0].Substring(cordinates[0].IndexOf('=') + 1));
                moon.PosY = long.Parse(cordinates[1].Substring(cordinates[1].IndexOf('=') + 1));
                moon.PosZ = long.Parse(cordinates[2].Substring(cordinates[2].IndexOf('=') + 1, cordinates[2].Length - 4));

                Moons.Add(moon);
            }

            return(Moons);
        }
Example #5
0
        public override object Task2()
        {
            Moon[] moons = new Moon[input.Length];

            for (int i = 0; i < input.Length; i++)
            {
                string[] parts = input[i].Substring(1, input[i].Length - 2).Split(", ");
                moons[i] = new Moon(int.Parse(parts[0].Split('=')[1]),
                                    int.Parse(parts[1].Split('=')[1]),
                                    int.Parse(parts[2].Split('=')[1]));
            }

            long[] intervals = new long[3];
            int    found     = 0;

            for (int step = 1; found < 3; step++)
            {
                SimulateStep(moons);

                bool[] stopped = new bool[] { true, true, true };

                for (int i = 0; i < moons.Length; i++)
                {
                    stopped[0] &= moons[i].Velocity.X == 0;
                    stopped[1] &= moons[i].Velocity.Y == 0;
                    stopped[2] &= moons[i].Velocity.Z == 0;
                }


                for (int i = 0; i < intervals.Length; i++)
                {
                    if (intervals[i] == 0 && stopped[i])
                    {
                        intervals[i] = step * 2;
                        found++;
                    }
                }
            }
            return(LCM(intervals));
        }