diff --git a/6.LINQ/StatisticsTask.cs b/6.LINQ/StatisticsTask.cs
index 926de15..5336ad2 100644
--- a/6.LINQ/StatisticsTask.cs
+++ b/6.LINQ/StatisticsTask.cs
@@ -1,4 +1,3 @@
-// Вставьте сюда финальное содержимое файла StatisticsTask.cs
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -7,52 +6,21 @@ namespace linq_slideviews
 {
 	public class StatisticsTask
 	{
-        private static double savedValue = 0;
-        private static bool sameSlide = false;
-
-        public static double GetMedianTimePerSlide(List<VisitRecord> visits, SlideType slideType)
-		{
-            return visits
-                 .GroupBy(visit => visit.UserId)
-                 .Select(group => group.OrderBy(x => x.DateTime)
-                 .Bigrams())
-                 .Select(bigram => GetAllTimes(bigram, slideType))
-                 .SelectMany(x => x)
-                 .Where(time=> time >= 1 && time <= 120)
-                 .ToList()
-                 .DefaultIfEmpty(0)
-                 .Median();
-        }
-
-        private static IEnumerable<double> GetAllTimes(IEnumerable<Tuple<VisitRecord, VisitRecord>> visits, SlideType slideType)
-        {
-            return visits
-                .Where(visit => visit.Item1.UserId.Equals(visit.Item2.UserId))
-                .Where(x => CheckForSlideId(x) && x.Item1.SlideType == slideType)
-                .Select(visit => visit.Item2.DateTime.Subtract(visit.Item1.DateTime).TotalMinutes + savedValue);
-        }
-
-        private static double GetTime(Tuple<VisitRecord, VisitRecord> visits)
-        {
-            if (!visits.Item1.UserId.Equals(visits.Item2.UserId)) return 0;
-            return visits.Item2.DateTime.Subtract(visits.Item1.DateTime).TotalMinutes;
-        }
-
-        private static bool CheckForSlideId(Tuple<VisitRecord, VisitRecord> visit)
-        {
-            if (visit.Item1.SlideId.Equals(visit.Item2.SlideId))
-            {
-                sameSlide = true;
-                savedValue += visit.Item2.DateTime.Subtract(visit.Item1.DateTime).TotalMinutes;
-                return false;
-            }
-            else if (sameSlide)
-            {
-                sameSlide = false;
-                return true;
-            }
-            savedValue = 0;
-            return true;
-        }
+		public static double GetMedianTimePerSlide(List<VisitRecord> visits, SlideType slideType){
+			return visits
+			       .ToLookup(x => x.UserId, x => x)
+			       .Select(x => x
+			                    .OrderBy(y => y.DateTime)
+			                    .Bigrams()
+			                    .Where(y => 
+				                    y.Item1.SlideType == slideType
+				                    && y.Item1.SlideId != y.Item2.SlideId)
+			                    .Select(y => y.Item2.DateTime.Subtract(y.Item1.DateTime).TotalMinutes)
+			                    .Where(y => y >= 1 && y <= 120)
+			       )
+			       .SelectMany(x => x)
+			       .DefaultIfEmpty(0)
+			       .Median();
+		}
 	}
-}
\ No newline at end of file
+}