Solution for Berlin Clock problem.

.gitignore

@@ -0,0 +1,4 @@
+.vs
+bin
+obj
+packages

Classes/TimeConverter.cs

@@ -1,6 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Text;
 
 namespace BerlinClock
@@ -9,7 +7,64 @@ public class TimeConverter : ITimeConverter
     {
         public string convertTime(string aTime)
         {
-            throw new NotImplementedException();
+            var splitTime = SplitTime(aTime);
+
+            var berlinHours = ConverHours(splitTime[0]);
+            var berlinMinutes = ConvertMinutes(splitTime[1]);
+            var berlinSeconds = ConvertSeconds(splitTime[2]);
+
+            return string.Format("{0}{1}{2}", berlinSeconds, berlinHours, berlinMinutes);
+        }
+        string[] SplitTime(string Time)
+        {
+            var time = Time.Split(':');
+
+            if (time.Length != 3)
+            {
+                throw new ArgumentException("Input parameter is invalid. Please use format HH:MM:SS", "Time");
+            }
+
+            return time;
+        }
+        string ConvertSeconds(string second)
+        {
+            return Convert.ToInt32(second) % 2 == 0 ? "Y" : "O";
+        }
+        string ConverHours(string hour)
+        {
+            var hourInt = Convert.ToInt32(hour);
+
+            var highHour = hourInt / 5;
+            var lowHour = hourInt % 5;
+
+            var highHourString = string.Concat(new string('R', highHour), new string('O', 4 - highHour));
+            var lowHourString = string.Concat(new string('R', lowHour), new string('O', 4 - lowHour));
+
+            return FormatValues(highHourString, lowHourString);
+        }
+        string ConvertMinutes(string minute)
+        {
+            var minuteInt = Convert.ToInt32(minute);
+
+            var highMinute = minuteInt / 5;
+            var lowMinute = minuteInt % 5;
+
+            var highMinuteString = string.Concat(new string('Y', highMinute), new string('O', 11 - highMinute));
+            var lowMinuteString = string.Concat(new string('Y', lowMinute), new string('O', 4 - lowMinute));
+
+            StringBuilder stringBuilder = new StringBuilder(highMinuteString);
+
+            for (int i = 0; i < stringBuilder.Length; i++)
+            {
+                if (stringBuilder[i] == 'Y' && (i + 1) % 3 == 0)
+                    stringBuilder[i] = 'R';
+            }
+
+            return FormatValues(stringBuilder.ToString(), lowMinuteString);
+        }
+        string FormatValues(string highValue, string lowValue)
+        {
+            return string.Format("\r\n{0}\r\n{1}", highValue, lowValue);
         }
     }
 }