ChallengeAccepted.cs

    struct CubeWithColor
    {
        public float3 position;
        public Color32 color;
    }

    List<CubeWithColor> ParseMVPointsFile(string filePath)
    {
        const string HEADER_LINE = "end_header";

        string[] lines = File.ReadAllLines(filePath);

        var cubes = new List<CubeWithColor>();

        bool readLine = false;
        for (int i = 0; i < lines.Length; i++)
        {
            if (!readLine)
            {
                if (lines[i] == HEADER_LINE)
                    readLine = true;
            }
            else
            {
                string[] nums = lines[i].Split(' ');

                if (nums == null || nums.Length != 6) continue;

                cubes.Add(new CubeWithColor()
                {
                    position = new float3(
                        int.Parse(nums[0]),
                        int.Parse(nums[1]),
                        int.Parse(nums[2])),
                    color = new Color32(
                        byte.Parse(nums[3]),
                        byte.Parse(nums[4]),
                        byte.Parse(nums[5]), 0)
                });
            }
        }

        return cubes;
    }