aoc/AdventOfCode/TwentyTwenty/Two.cs

using AdventOfCode.Contracts;
using AoC.Utils;
using System;
using System.Diagnostics;
namespace AoC.TwentyTwenty
{


    namespace AoC.TwentyTwenty
    {
        class Two : Day
        {
            public override int Year => 2020;
            public override int DayNumber => 2;

            public override void BigBoi(string[] input)
            {
                throw new NotImplementedException();
            }

            public override void Part1(string[] input)
            {
                int total = 0;
                foreach (string s in input)
                {
                    int occurences = 0;
                    string[] split = s.Split(" ");
                    string[] startEnd = split[0].Split("-");
                    int start = int.Parse(startEnd[0]);
                    int end = int.Parse(startEnd[1]);
                    char c = split[1][0];

                    foreach (char letter in split[2])
                    {
                        if (letter == c)
                        {
                            occurences += 1;
                        }
                    }

                    if (occurences >= start && occurences <= end)
                    {
                        total += 1;
                    }
                }

                Print("1", total);
            }

            public override void Part2(string[] input)
            {
                int total = 0;
                foreach (string s in input)
                {
                    string[] split = s.Split(" ");
                    string[] startEnd = split[0].Split("-");
                    string password = split[2];
                    char start = password[int.Parse(startEnd[0]) - 1];
                    char end = password[int.Parse(startEnd[1]) - 1];
                    char c = split[1][0];
                    

                    bool thing = (start, end) switch
                    {
                        _ when start == end => false,
                        _ when start == c || end == c => true,
                        _ => false
                    };

                    if (thing)
                    {
                        total += 1;
                    }
                }

                Print("2", total);
            }
        }
    }
}