AdventOfCode2022/Handlers/Day04.cs

namespace AdventOfCode2022.Handlers
{
    public class Day04
    {
        string[] pairs = new string[] {};
        public Day04()
        {
            pairs = File.ReadAllText(@"./days/04/input").Trim().Split("\n");
        }

        public void PartA()
        {
            var count = 0;
            foreach (var pair in pairs)
            {
                var split = pair.Split(",");
                var first = split[0];
                var second = split[1];

                var firstMin = int.Parse(first.Split("-")[0]);
                var firstMax = int.Parse(first.Split("-")[1]);

                var secondMin = int.Parse(second.Split("-")[0]);
                var secondMax = int.Parse(second.Split("-")[1]);

                if (firstMin <= secondMin && firstMax >= secondMax)
                {
                    count++;
                    continue;
                }

                if (secondMin <= firstMin && secondMax >= firstMax)
                {
                    count++;
                }
            }

            Console.WriteLine($"Part A: {count}");
        }

        public void PartB()
        {
            var count = 0;
            foreach (var pair in pairs)
            {
                var split = pair.Split(",");
                var first = split[0];
                var second = split[1];

                var firstMin = int.Parse(first.Split("-")[0]);
                var firstMax = int.Parse(first.Split("-")[1]);

                var secondMin = int.Parse(second.Split("-")[0]);
                var secondMax = int.Parse(second.Split("-")[1]);

                for (var i = firstMin; i <= firstMax; i++)
                {
                    var shouldLoop = true;
                    for (var j = secondMin; j <= secondMax; j++)
                    {
                        if (i == j)
                        {
                            count++;
                            shouldLoop = false;
                            break;
                        }
                    }

                    if (!shouldLoop)
                    {
                        break;
                    }
                }
            }

            Console.WriteLine($"Part B: {count}");
        }
    }
}