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2018_05/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.IO;
+using static System.Console;
+
+namespace _2018_05
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            int removes = 0;
+            string resTab = File.ReadAllText(@"..\..\..\Data\Adventofcode_181205\2018_05_data.txt");
+            //string resTab = "dabAcCaCBAcCcaDA";
+
+
+
+            int varv = 0;
+
+            string nextStr = nextLevelStr(resTab,ref removes, ref varv);
+            while (removes > 0)
+            {
+                nextStr= nextLevelStr(nextStr, ref removes, ref varv);
+            }
+
+            WriteLine($"Resulterande sträng : {nextStr} , {nextStr.Length} tkn");
+            ReadKey();
+            
+        }
+
+        private static string nextLevelStr(string resTab,ref int removes, ref int varv)
+        {
+            string tmp = "";
+            removes = 0;
+            WriteLine($"inLängd: {resTab.Length}");
+            foreach(char tkn in resTab.ToCharArray())
+            {
+                tmp += tkn;
+                if (tmp.Length > 1)
+                {
+                    string v = tmp.Substring(tmp.Length - 2, 1);
+                    string z = tmp.Substring(tmp.Length - 1, 1);
+
+                    if ((v.ToUpper()== v && z.ToLower() == z || (z.ToUpper() == z && v.ToLower() == v))
+                        && (v.ToUpper() == z.ToUpper()))
+                    {
+                        if (tmp.Length > 2)
+                        {
+                            tmp = tmp.Substring(0, tmp.Length - 2);
+                            removes++;
+                        }
+                        else tmp = "";
+                    }
+                }
+            }
+            WriteLine($"varv {++varv} ; aktuell längd: {tmp.Length} removes = {removes}");
+            return tmp;
+        }
+    }
+}