Add various uncommitted 2021 files for posterity

2021/08/08.csproj

@@ -8,4 +8,10 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Update="input.txt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>

2021/08/Program.cs

@@ -56,12 +56,18 @@
                 string secondHalf = line.Substring(line.IndexOf("|") + 1);
                 List<string> numberSegments = secondHalf.Split(' ').ToList();
 
+
+
+
+
+
                 string lineTotal = string.Empty;
 
                 foreach (string numberSegment in numberSegments)
                 {
                     // Go through sorted in alphabetical order
                     string alphabetisedNumberSegment = String.Concat(numberSegment.OrderBy(c => c));
+                    Console.WriteLine(alphabetisedNumberSegment);
 
                     if(alphabetisedNumberSegment == String.Concat("acedgfb".OrderBy(c => c)))
                     {
@@ -103,6 +109,8 @@
                     {
                         lineTotal += "1";
                     }
+
+                    Console.WriteLine(lineTotal);
                 }
 
                 Console.WriteLine(lineTotal);
@@ -114,5 +122,45 @@
 
             Console.WriteLine(total);
         }
+    
+        static Dictionary<int, string> DetermineMapping(string[] lines)
+        {
+            Dictionary<int, string> mapping = new Dictionary<int, string>();
+
+            foreach (string line in lines)
+            {
+                string secondHalf = line.Substring(line.IndexOf("|") + 1);
+                List<string> numberSegments = secondHalf.Split(' ').ToList();
+
+                foreach (string numberSegment in numberSegments)
+                {
+                    switch (numberSegment.Length)
+                    {
+                        case 7:
+                            // 8 has only 7 segments/letters 
+                            mapping.Add(8, numberSegment);
+                            break;
+                        case 3:
+                            // 7 has only 3 segments/letters
+                            mapping.Add(7, numberSegment);
+                            break;
+                        case 4:
+                            // 4 has only 4 segments/letters 
+                            mapping.Add(4, numberSegment);
+                            break;
+                        case 2:
+                            // 1 has only 2 segments/letters
+                            mapping.Add(1, numberSegment);
+                            break;
+                        default:
+                            // handle the non-unique lengths (0,2,3,5,6,9)
+                            
+                            break;
+                    }
+                }
+            }
+
+            return mapping;
+        }
     }
 }

2021/08/input.txt

@@ -1,10 +1 @@
-be cfbegad cbdgef fgaecd cgeb fdcge agebfd fecdb fabcd edb | fdgacbe cefdb cefbgd gcbe
-edbfga begcd cbg gc gcadebf fbgde acbgfd abcde gfcbed gfec | fcgedb cgb dgebacf gc
-fgaebd cg bdaec gdafb agbcfd gdcbef bgcad gfac gcb cdgabef | cg cg fdcagb cbg
-fbegcd cbd adcefb dageb afcb bc aefdc ecdab fgdeca fcdbega | efabcd cedba gadfec cb
-aecbfdg fbg gf bafeg dbefa fcge gcbea fcaegb dgceab fcbdga | gecf egdcabf bgf bfgea
-fgeab ca afcebg bdacfeg cfaedg gcfdb baec bfadeg bafgc acf | gebdcfa ecba ca fadegcb
-dbcfg fgd bdegcaf fgec aegbdf ecdfab fbedc dacgb gdcebf gf | cefg dcbef fcge gbcadfe
-bdfegc cbegaf gecbf dfcage bdacg ed bedf ced adcbefg gebcd | ed bcgafe cdgba cbgef
-egadfb cdbfeg cegd fecab cgb gbdefca cg fgcdab egfdb bfceg | gbdfcae bgc cg cgb
-gcafb gcf dcaebfg ecagb gf abcdeg gaef cafbge fdbac fegbdc | fgae cfgab fg bagce
+be cfbegad cbdgef fgaecd cgeb fdcge agebfd fecdb fabcd edb | fdgacbe cefdb cefbgd gcbe