65 lines
2.5 KiB
C#
65 lines
2.5 KiB
C#
using AdventOfCode.Core;
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using System.Text.RegularExpressions;
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namespace AdventOfCode.Solutions._2023
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{
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public class Day01(InputReader reader) : IChallange
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{
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private readonly List<string> NumberMapping = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
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private InputReader _inputReader = reader;
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public async Task<string> GetSolutionPart1()
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{
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int sum = 0;
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await foreach(string line in _inputReader.ReadAsStringLine())
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{
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// get all the numers
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MatchCollection collection = Regex.Matches(line, @"\d");
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// merge first and last index as one
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string values = collection[0].Value + collection[^1].Value;
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// make an int
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sum += int.Parse(values);
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}
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return sum.ToString();
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}
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public async Task<string> GetSolutionPart2()
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{
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int sum = 0;
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await foreach (string line in _inputReader.ReadAsStringLine())
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{
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string regex = @"(\d|one|two|three|four|five|six|seven|eight|nine)";
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MatchCollection matchCollection = Regex.Matches(line, @"(\d)");
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List<Match> captures = matchCollection.ToList();
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// replace the text with numbers
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captures.AddRange(Regex.Matches(line, @"(one)"));
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captures.AddRange(Regex.Matches(line, @"(two)"));
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captures.AddRange(Regex.Matches(line, @"(three)"));
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captures.AddRange(Regex.Matches(line, @"(four)"));
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captures.AddRange(Regex.Matches(line, @"(five)"));
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captures.AddRange(Regex.Matches(line, @"(six)"));
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captures.AddRange(Regex.Matches(line, @"(seven)"));
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captures.AddRange(Regex.Matches(line, @"(eight)"));
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captures.AddRange(Regex.Matches(line, @"(nine)"));
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captures = captures.OrderBy(x => x.Index).ToList();
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// merge first and last index as one
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string values = GetStringAsNumber(captures.First().Value) + GetStringAsNumber(captures.Last().Value);
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// make an int
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sum += int.Parse(values);
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}
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return sum.ToString();
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}
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private string GetStringAsNumber(string value)
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{
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return value.Length == 1 ? value : NumberMapping.IndexOf(value).ToString();
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}
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}
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} |