Day 1

It's messy and it took me a frighteningly long time to get part 2 correct (not a good sign...) but it is finished.

advent-of-code-2023.csproj

@@ -26,6 +26,7 @@
 	<ItemGroup>
 	  <None Remove="inputs\01.txt" />
 	  <None Remove="inputs\01a.txt" />
+	  <None Remove="inputs\01b.txt" />
 	</ItemGroup>
 
 	<ItemGroup>
@@ -33,4 +34,8 @@
 	  <EmbeddedResource Include="inputs\01a.txt" />
 	</ItemGroup>
 
+	<ItemGroup>
+	  <EmbeddedResource Include="inputs\01b.txt" />
+	</ItemGroup>
+
 </Project>

inputs/01a.txt

@@ -1,14 +1,4 @@
-1000
-2000
-3000
-
-4000
-
-5000
-6000
-
-7000
-8000
-9000
-
-10000
+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet

inputs/01b.txt

@@ -0,0 +1,7 @@
+two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen

src/01.cs

@@ -2,22 +2,92 @@
 
 internal class Day01 : Day
 {
+    private readonly List<string> numStrs = new()
+    {
+        "1",
+        "one",
+        "2",
+        "two",
+        "3",
+        "three",
+        "4",
+        "four",
+        "5",
+        "five",
+        "6",
+        "six",
+        "7",
+        "seven",
+        "8",
+        "eight",
+        "9",
+        "nine",
+    };
+
+    private readonly Dictionary<string, string> strs = new()
+    {
+        {"one", "1" },
+        {"two", "2" },
+        {"three", "3" },
+        {"four", "4" },
+        {"five", "5" },
+        {"six", "6" },
+        {"seven", "7" },
+        {"eight", "8" },
+        {"nine", "9" },
+    };
+
+    private readonly List<int> nums = new();
+    private readonly List<int> num2 = new();
     internal override void Parse()
     {
         var lines = Util.Parsing.ReadAllLines($"{GetDay()}");
+        foreach (var line in lines)
+        {
+            try
+            {
+                var firstNum = line.First(c => c >= '1' && c <= '9');
+                var lastNum = line.Last(c => c >= '1' && c <= '9');
+                nums.Add(int.Parse($"{firstNum}{lastNum}"));
+            }
+            catch { }
+
+            List<int> digits = new();
+            for (int i = 0; i < line.Length; i++)
+            {
+                var s = line[..(i+1)];
+                foreach (var ns in numStrs)
+                {
+                    if (s.EndsWith(ns))
+                    {
+                        s = ns;
+                        break;
+                    }
+                }
+
+                if (numStrs.Contains(s))
+                {
+                    if (strs.TryGetValue(s, out var str))
+                    {
+                        s = str;
+                    }
+                    digits.Add(s[0] - '0');
+                }
+            }
+
+            num2.Add((digits.First() * 10) + digits.Last());
+        }
     }
 
     internal override string Part1()
     {
-
-
-        return $"<+white>";
+        long total = nums.Sum();
+        return $"Calibration sum for literal digits: <+white>{total}";
     }
 
     internal override string Part2()
     {
-
-
-        return $"<+white>";
+        long total = num2.Sum();
+        return $"Calibration sum for spelled and literal digits: <+white>{total}";
     }
 }