diff --git a/.vs/slnx.sqlite b/.vs/slnx.sqlite
index 015932d..ea9ac80 100644
Binary files a/.vs/slnx.sqlite and b/.vs/slnx.sqlite differ
diff --git a/Zurnal/Domain/UseCase/UseCasePresence.cs b/Zurnal/Domain/UseCase/UseCasePresence.cs
index f6ddb9e..2c84b9e 100644
--- a/Zurnal/Domain/UseCase/UseCasePresence.cs
+++ b/Zurnal/Domain/UseCase/UseCasePresence.cs
@@ -1,56 +1,38 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
-namespace Zurnal.Domain.UseCase
+namespace Zurnal.Presence
 {
     internal class UseCasePresence
     {
-        private Dictionary<string, List<DateTime>> attendanceRecords;
+        private List<AttendanceRecord> attendanceRecords;
 
-        public UseCasePresence()
+        public UseCasePresence(List<AttendanceRecord> attendanceRecords)
         {
-            attendanceRecords = new Dictionary<string, List<DateTime>>();
+            this.attendanceRecords = attendanceRecords;
         }
 
-        public void MarkAttendance(string group, DateTime date)
+        public List<AttendanceRecord> GetAttendanceByGroup(string groupNumber)
         {
-            if (!attendanceRecords.ContainsKey(group))
-            {
-                attendanceRecords[group] = new List<DateTime>();
-            }
-            attendanceRecords[group].Add(date);
+            return attendanceRecords.Where(record => record.GroupNumber == groupNumber).ToList();
         }
 
-        public List<DateTime> GetAttendanceByGroup(string group)
+        public List<AttendanceRecord> GetAttendanceByGroupAndDate(string groupNumber, DateTime date)
         {
-            if (attendanceRecords.ContainsKey(group))
-            {
-                return attendanceRecords[group];
-            }
-            return new List<DateTime>();
+            return attendanceRecords.Where(record => record.GroupNumber == groupNumber && record.Date.Date == date.Date).ToList();
         }
 
-        public List<DateTime> GetAttendanceByGroupAndDate(string group, DateTime date)
+        public void MarkUserAsAbsent(string groupNumber, int firstLesson, int lastLesson, DateTime date)
         {
-            if (attendanceRecords.ContainsKey(group))
+            foreach (var lesson in Enumerable.Range(firstLesson, lastLesson - firstLesson + 1))
             {
-                return attendanceRecords[group].Where(d => d.Date == date.Date).ToList();
-            }
-            return new List<DateTime>();
-        }
-
-        public void MarkUserAsAbsent(string group, DateTime startDate, DateTime endDate)
-        {
-            if (attendanceRecords.ContainsKey(group))
-            {
-                for (DateTime date = startDate; date <= endDate; date = date.AddDays(1))
+                var record = attendanceRecords.FirstOrDefault(r => r.GroupNumber == groupNumber && r.LessonNumber == lesson && r.Date.Date == date.Date);
+                if (record != null)
                 {
-                    attendanceRecords[group].Remove(date);
+                    record.IsPresent = false;
                 }
             }
         }
     }
-}
+}
\ No newline at end of file