AdventOfCode/AdventOfCode.Solutions/2022/Day 03/Day03Part1.cs

namespace AdventOfCode.Solutions._2022
{
    public class Day03Part1 : Answerable
    {
        public override int Year { get; set; } = 2022;
        public override int Day { get; set; } = 3;
        public override int Part { get; set; } = 1;

        public override string GetAnswer(byte[] data)
        {
            string[] rucksackData = GetAsStringArray(data);
            int priorityCount = 0;

            // go throu each ruchsack
            foreach (string rucksack in rucksackData.Where(x => !string.IsNullOrWhiteSpace(x)))
            {
                // split the data line down the middel
                string rucksackOne = rucksack.Substring(0, rucksack.Length / 2);
                string rucksackTwo = rucksack.Substring(rucksack.Length / 2, rucksack.Length / 2);
                char prioChar = rucksackOne.Where(x => rucksackTwo.Contains(x)).First();
                priorityCount += prioChar > 'Z' ? (prioChar - 'a' + 1) : (prioChar - 'A' + 27);
            }

            return priorityCount.ToString();
        }
    }
}