Initial Commit

2022/Day06CSharp/Program.cs

@@ -0,0 +1,53 @@
+
+string[] examples =
+{
+    "mjqjpqmgbljsphdztnvjfqwrcgsmlb",
+    "bvwbjplbgvbhsrlpgdmjqwftvncz",
+    "nppdvjthqldpwncqszvftbrmjlhg",
+    "nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg",
+    "zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw",
+};
+
+int[] uniqueCount = { 4, 14 };
+
+/**** Part 01 ***/
+foreach (var unique in uniqueCount)
+{
+    Console.WriteLine(String.Format("\nFinding based on {0} unique consequetive characters", unique));
+
+    // Perform ops on examples
+    foreach (string example in examples)
+    {
+        PrintFirstUniqueIndex(example, unique);
+    }
+
+    // Do it on the real puzzle
+    string fileName = "puzzle-input.txt";
+    using (StreamReader reader = File.OpenText(fileName))
+    {
+        string? line = reader.ReadLine();
+        if (line != null)
+        {
+            PrintFirstUniqueIndex(line, unique);
+        }
+        else
+        {
+            throw new InvalidDataException();
+        }
+    }
+}
+
+void PrintFirstUniqueIndex(string str, int uniqueLength)
+{
+    for (int i = 0; i < str.Length; i++)
+    {
+        var substr = str.Substring(i, uniqueLength);
+        if (substr.Distinct().Count() == uniqueLength)
+        {
+            Console.WriteLine("Unique Index Start: " + (i+uniqueLength));
+            return;
+        }
+    }
+
+    throw new InvalidDataException();
+}