diff --git a/Lib_CSharp b/Lib_CSharp
index fa260546..6b7ed8c0 160000
--- a/Lib_CSharp
+++ b/Lib_CSharp
@@ -1 +1 @@
-Subproject commit fa26054678e1c938b1120f7eaab8b26476700245
+Subproject commit 6b7ed8c04f1728570c2f7575bc1ceab2b713f04b
diff --git a/PoliNetwork.Graduatorie.Common/Enums/SchoolEnum.cs b/PoliNetwork.Graduatorie.Common/Enums/SchoolEnum.cs
index 66b6eced..12bb8d69 100644
--- a/PoliNetwork.Graduatorie.Common/Enums/SchoolEnum.cs
+++ b/PoliNetwork.Graduatorie.Common/Enums/SchoolEnum.cs
@@ -28,7 +28,7 @@ public static string ToShortName(this SchoolEnum s)
             SchoolEnum.Design => "DES",
             SchoolEnum.Ingegneria => "ENG",
             SchoolEnum.Urbanistica => "URB",
-            _ => "UNK",
+            _ => "UNK"
         };
     }
 }
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Common/Objects/EnrollType.cs b/PoliNetwork.Graduatorie.Common/Objects/EnrollType.cs
index 2fb946ec..09d44d99 100644
--- a/PoliNetwork.Graduatorie.Common/Objects/EnrollType.cs
+++ b/PoliNetwork.Graduatorie.Common/Objects/EnrollType.cs
@@ -23,7 +23,7 @@ public int GetHashWithoutLastUpdate()
 
         return i;
     }
-    
+
     public static EnrollType From(string? rowCanEnrollInto, bool rowCanEnroll)
     {
         if (rowCanEnroll == false)
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/IndexJsonBase.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/IndexJsonBase.cs
index 1dbd7040..15124454 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/IndexJsonBase.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/IndexJsonBase.cs
@@ -6,6 +6,9 @@
 using PoliNetwork.Graduatorie.Common.Objects;
 using PoliNetwork.Graduatorie.Parser.Objects.Json.Indexes.Specific;
 using PoliNetwork.Graduatorie.Parser.Objects.RankingNS;
+using PoliNetwork.Graduatorie.Parser.Objects.Tables.Course;
+using PoliNetwork.Graduatorie.Parser.Objects.Tables.Merit;
+using PoliNetwork.Graduatorie.Parser.Utils;
 
 #endregion
 
@@ -23,12 +26,115 @@ public void WriteToFile(string outFolder, string pathFile)
         var mainJsonString = JsonConvert.SerializeObject(this, Culture.JsonSerializerSettings);
         File.WriteAllText(mainJsonPath, mainJsonString);
     }
-    
+
+
     public static void WriteAllIndexes(RankingsSet rankingsSet, string outFolder, ArgsConfig argsConfig)
     {
+        //let's write all single json files
+        WriteSingleJsons(rankingsSet, outFolder, argsConfig);
         //now let's write each single different index
         BySchoolYearJson.From(rankingsSet)?.WriteToFile(outFolder, BySchoolYearJson.PathCustom);
         ByYearSchoolJson.From(rankingsSet)?.WriteToFile(outFolder, ByYearSchoolJson.PathCustom);
         BySchoolYearCourseJson.From(rankingsSet)?.WriteToFile(outFolder, BySchoolYearCourseJson.PathCustom);
     }
+
+
+    public static void WriteSingleJsons(RankingsSet? set, string outFolder, ArgsConfig argsConfig)
+    {
+        if (set == null)
+            return;
+
+        // group rankings by year
+        var bySchool = set.Rankings.GroupBy(r => r.School);
+        foreach (var schoolGroup in bySchool)
+        {
+            if (schoolGroup.Key is null)
+                continue;
+            var school = schoolGroup.Key.Value;
+
+            var byYears = schoolGroup.GroupBy(r => r.Year);
+            foreach (var yearGroup in byYears)
+            {
+                if (yearGroup.Key is null)
+                    continue;
+                var year = yearGroup.Key.Value;
+                var folder = Path.Join(outFolder, school.ToString(), year.ToString());
+                Directory.CreateDirectory(folder);
+
+                foreach (var ranking in yearGroup) WriteSingleJsonRanking(folder, ranking, argsConfig);
+            }
+        }
+    }
+
+    private static void WriteSingleJsonRanking(string folder, Ranking ranking, ArgsConfig argsConfig)
+    {
+        var path = Path.Join(folder, ranking.GetFilename());
+
+        if (ExitIfAlreadyExistsAndNotUpdated(ranking, path) && !argsConfig.ForceReparsing) return;
+
+        var rankingJsonString = JsonConvert.SerializeObject(ranking, Culture.JsonSerializerSettings);
+        File.WriteAllText(path, rankingJsonString);
+    }
+
+    private static bool ExitIfAlreadyExistsAndNotUpdated(Ranking a, string path)
+    {
+        if (!File.Exists(path)) return false;
+        var b = GetRankingFromFile(path);
+        return b != null && SameHash(a, b);
+    }
+
+    private static bool SameHash(Ranking a, Ranking b)
+    {
+        var ai = a.GetHashWithoutLastUpdate();
+        var bi = b.GetHashWithoutLastUpdate();
+        return ai == bi;
+    }
+
+    private static bool SameHashCourse(IReadOnlyCollection<CourseTable>? aTableCourse,
+        IReadOnlyCollection<CourseTable>? bTableCourse)
+    {
+        if (aTableCourse == null && bTableCourse == null)
+            return true;
+        if (aTableCourse == null || bTableCourse == null)
+            return false;
+
+        if (aTableCourse.Count != bTableCourse.Count)
+            return false;
+
+        var aList = aTableCourse.Select(variable =>
+        {
+            var hashWithoutLastUpdate = variable.GetHashWithoutLastUpdate();
+            return hashWithoutLastUpdate;
+        }).ToList();
+        var aHash = Hashing.GetHashFromListHash(aList);
+
+        var bList = bTableCourse.Select(variable =>
+        {
+            var hashWithoutLastUpdate = variable.GetHashWithoutLastUpdate();
+            return hashWithoutLastUpdate;
+        }).ToList();
+        var bHash = Hashing.GetHashFromListHash(bList);
+
+        return aHash == bHash;
+    }
+
+    private static bool SameHashMerit(MeritTable? aTableMerit, MeritTable? bTableMerit)
+    {
+        if (aTableMerit == null && bTableMerit == null)
+            return true;
+        if (aTableMerit == null || bTableMerit == null)
+            return false;
+
+        var ai = aTableMerit.GetHashWithoutLastUpdate();
+        var bi = bTableMerit.GetHashWithoutLastUpdate();
+        return ai == bi;
+    }
+
+    private static Ranking? GetRankingFromFile(string path)
+    {
+        var x = File.ReadAllText(path);
+
+        var j = JsonConvert.DeserializeObject<Ranking>(x, Culture.JsonSerializerSettings);
+        return j;
+    }
 }
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearCourseJson.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearCourseJson.cs
index ae84a487..e4e9c9e0 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearCourseJson.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearCourseJson.cs
@@ -1,9 +1,11 @@
 #region
+
 using System.Diagnostics;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
 using PoliNetwork.Graduatorie.Common.Enums;
 using PoliNetwork.Graduatorie.Parser.Objects.RankingNS;
+
 #endregion
 
 namespace PoliNetwork.Graduatorie.Parser.Objects.Json.Indexes.Specific;
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/SingleCourseJson.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/SingleCourseJson.cs
index 0a6d1b72..9f5dbb0b 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/SingleCourseJson.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/SingleCourseJson.cs
@@ -12,16 +12,42 @@ namespace PoliNetwork.Graduatorie.Parser.Objects.Json;
 
 [Serializable]
 [JsonObject(MemberSerialization.Fields, NamingStrategyType = typeof(CamelCaseNamingStrategy))]
-public class SingleCourseJson: IComparable<SingleCourseJson>
+public class SingleCourseJson : IComparable<SingleCourseJson>
 {
     public string? BasePath;
+    public string? Id;
     public string? Link;
     public string? Location;
-    public string? Id;
     public RankingOrder? RankingOrder;
     public SchoolEnum? School;
     public int? Year;
 
+
+    public int CompareTo(SingleCourseJson? singleCourseJson)
+    {
+        if (singleCourseJson == null) return 1;
+
+        if (Year != singleCourseJson.Year)
+            return (Year ?? -1) < (singleCourseJson.Year ?? -1) ? -1 : 1;
+
+        if (School != singleCourseJson.School) return School < singleCourseJson.School ? -1 : 1;
+
+        if (BasePath != singleCourseJson.BasePath)
+            return string.Compare(BasePath ?? "", singleCourseJson.BasePath ?? "", StringComparison.InvariantCulture);
+
+        if (Link != singleCourseJson.Link)
+            return string.Compare(Link ?? "", singleCourseJson.Link ?? "", StringComparison.InvariantCulture);
+
+        if (Location != singleCourseJson.Location)
+            return string.Compare(Location ?? "", singleCourseJson.Location ?? "", StringComparison.InvariantCulture);
+
+        if (Id != singleCourseJson.Id)
+            return string.Compare(Id ?? "", singleCourseJson.Id ?? "", StringComparison.InvariantCulture);
+
+        return 0;
+    }
+
+
     public static SingleCourseJson From(Ranking ranking, CourseTable? course)
     {
         var basePath = $"{ranking.School}/{ranking.Year}/"; // "Ingegneria/2023"
@@ -48,29 +74,6 @@ public int GetHashWithoutLastUpdate()
         return hashWithoutLastUpdate ^ hashCode ^ basePathInt ^ yearInt ^ schoolInt ^ code;
     }
 
-    public int CompareTo(SingleCourseJson? singleCourseJson)
-    {
-        if (singleCourseJson == null) return 1;
-        
-        if (Year != singleCourseJson.Year)
-            return (Year ?? -1) < (singleCourseJson.Year ?? -1) ? -1 : 1;
-
-        if (School != singleCourseJson.School) return School < singleCourseJson.School ? -1 : 1;
-
-        if (BasePath != singleCourseJson.BasePath)
-            return string.Compare(BasePath ?? "", singleCourseJson.BasePath ?? "", StringComparison.InvariantCulture);
-
-        if (Link != singleCourseJson.Link)
-            return string.Compare(Link ?? "", singleCourseJson.Link ?? "", StringComparison.InvariantCulture);
-
-        if (Location != singleCourseJson.Location)
-            return string.Compare(Location ?? "", singleCourseJson.Location ?? "", StringComparison.InvariantCulture);
-
-        if (Id != singleCourseJson.Id)
-            return string.Compare(Id ?? "", singleCourseJson.Id ?? "", StringComparison.InvariantCulture);
-
-        return 0;
-    }
 
     public bool Is(CourseTable courseTable)
     {
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/Ranking.cs b/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/Ranking.cs
index aed019d1..8ee534c0 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/Ranking.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/Ranking.cs
@@ -10,7 +10,6 @@
 using PoliNetwork.Graduatorie.Parser.Objects.Json.Stats;
 using PoliNetwork.Graduatorie.Parser.Objects.Tables.Course;
 using PoliNetwork.Graduatorie.Parser.Objects.Tables.Merit;
-using PoliNetwork.Graduatorie.Parser.Utils;
 using PoliNetwork.Graduatorie.Parser.Utils.Output;
 
 #endregion
@@ -31,33 +30,45 @@ public class Ranking : IComparable<Ranking>, IEquatable<Ranking>
     public RankingUrl? Url;
     public int? Year;
 
-    public RankingSummaryStudent GetRankingSummaryStudent()
+
+    public int CompareTo(Ranking? other)
     {
-        return new RankingSummaryStudent(RankingOrder?.Phase, School, Year, Url);
+        if (ReferenceEquals(this, other)) return 0;
+        if (ReferenceEquals(null, other)) return 1;
+
+        return string.Compare(GetId(), other.GetId(), StringComparison.Ordinal);
     }
-    
+
+
+    public bool Equals(Ranking? other)
+    {
+        if (other == null) return false;
+        return GetHashWithoutLastUpdate() == other.GetHashWithoutLastUpdate();
+    }
+
+
     public static Ranking? FromJson(string fullPath)
     {
         if (!File.Exists(fullPath)) return null;
-        
+
         var str = File.ReadAllText(fullPath);
         var ranking = JsonConvert.DeserializeObject<Ranking>(str, Culture.JsonSerializerSettings);
         return ranking;
     }
 
-    public int CompareTo(Ranking? other)
+    public RankingSummaryStudent GetRankingSummaryStudent()
     {
-        if (ReferenceEquals(this, other)) return 0;
-        if (ReferenceEquals(null, other)) return 1;
-        
-        return string.Compare(GetId(), other.GetId(), StringComparison.Ordinal);
+        return new RankingSummaryStudent(RankingOrder?.Phase, School, Year, Url);
     }
 
+    public override bool Equals(object? obj)
+    {
+        return Equals(obj as Ranking);
+    }
 
-    public bool Equals(Ranking? other)
+    public override int GetHashCode()
     {
-        if (other == null) return false;
-        return GetHashWithoutLastUpdate() == other.GetHashWithoutLastUpdate();
+        return GetHashWithoutLastUpdate();
     }
 
 
@@ -99,7 +110,7 @@ public string GetFilename()
     public string GetId()
     {
         var idList = new List<string>();
-        
+
         var schoolShort = School?.ToShortName();
         if (schoolShort != null) idList.Add(schoolShort);
 
@@ -108,7 +119,7 @@ public string GetId()
 
         var orderId = RankingOrder?.GetId();
         if (orderId != null) idList.Add(orderId);
-        
+
         var fallback = DateTime.UtcNow.ToString("yyyyMMddTHHmmss", CultureInfo.InvariantCulture) + "Z";
         if (idList.Count == 0) idList.Add(fallback);
 
@@ -159,7 +170,7 @@ public void WriteAsJson(string outFolder, bool forceReparse = false)
     {
         var folderPath = GetBasePath(outFolder);
         Directory.CreateDirectory(folderPath);
-        
+
         var fullPath = GetFullPath(outFolder);
 
         var savedRanking = FromJson(fullPath);
@@ -171,7 +182,7 @@ public void WriteAsJson(string outFolder, bool forceReparse = false)
             File.WriteAllText(fullPath, rankingJsonString);
         }
     }
-    
+
     /***
      * Ottieni l'hash senza considerare il valore di LastUpdate
      */
@@ -185,7 +196,7 @@ public int GetHashWithoutLastUpdate()
         i ^= Url?.GetHashWithoutLastUpdate() ?? "Url".GetHashCode();
         i ^= Year?.GetHashCode() ?? "Year".GetHashCode();
         var iMerit = ByMerit?.GetHashWithoutLastUpdate();
-        i ^= Hashing.GetHashFromListHash(iMerit) ?? "ByMerit".GetHashCode();
+        i ^= iMerit ?? "ByMerit".GetHashCode();
 
 
         if (ByCourse == null)
@@ -194,8 +205,7 @@ public int GetHashWithoutLastUpdate()
             i = ByCourse.Aggregate(i, (current, variable) =>
             {
                 var hashWithoutLastUpdate = variable.GetHashWithoutLastUpdate();
-                var iList = Hashing.GetHashFromListHash(hashWithoutLastUpdate) ?? "empty".GetHashCode();
-                return current ^ iList;
+                return current ^ hashWithoutLastUpdate;
             });
 
         return i;
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/RankingOrder.cs b/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/RankingOrder.cs
index e7407401..561908ca 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/RankingOrder.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/RankingOrder.cs
@@ -11,6 +11,9 @@ namespace PoliNetwork.Graduatorie.Parser.Objects.RankingNS;
 [JsonObject(MemberSerialization.Fields, NamingStrategyType = typeof(CamelCaseNamingStrategy))]
 public class RankingOrder
 {
+    public bool IsAnticipata; // used for DES/URB rankings until 2023
+    public bool IsEnglish;
+    public bool IsExtraEu;
     public string? Phase; // the original string (e.g. "
 
     //esempio:
@@ -18,15 +21,12 @@ public class RankingOrder
     //prima graduatoria di seconda fase:{primary:2, secondary:1}
     public int? Primary;
     public int? Secondary;
-    public bool IsAnticipata; // used for DES/URB rankings until 2023
-    public bool IsExtraEu;
-    public bool IsEnglish;
 
     public RankingOrder(string phase, bool isExtraEu = false, bool isEnglish = false)
     {
         Phase = phase;
         ParsePhaseString(phase);
-        
+
         IsExtraEu = isExtraEu;
         IsEnglish = isEnglish;
     }
@@ -35,12 +35,12 @@ private void ParsePhaseString(string phase)
     {
         var s = phase.ToUpper().Trim();
         if (string.IsNullOrEmpty(s)) return;
-        
+
         var strings = s.Split(" ");
-        
+
         IsAnticipata = s.Contains("ANTICIPATA");
         if (IsAnticipata) return;
-        
+
         Primary = ExtractPhaseNumberByKey(strings, "FASE");
         Secondary = ExtractPhaseNumberByKey(strings, "GRADUATORIA");
     }
@@ -74,22 +74,19 @@ private void ParsePhaseString(string phase)
     public string GetId()
     {
         var idList = new List<string>();
-        if (IsAnticipata) idList.Add($"anticipata");
+        if (IsAnticipata) idList.Add("anticipata");
         if (Primary != null) idList.Add($"{Primary}fase");
         if (Secondary != null) idList.Add($"{Secondary}grad");
-        
+
         var cleanPhase = Phase?.Replace("_", "").Replace("-", "").Replace(" ", "_").ToLower() ?? "";
-        var noOrder = IsAnticipata == false && Primary == null && Secondary == null; 
+        var noOrder = IsAnticipata == false && Primary == null && Secondary == null;
         var isSingleExtraEu = noOrder && cleanPhase.Contains("extraue");
 
-        if (noOrder)
-        { 
-            idList.Add(isSingleExtraEu ? "extraeu" : cleanPhase);
-        }
-        
+        if (noOrder) idList.Add(isSingleExtraEu ? "extraeu" : cleanPhase);
+
         idList.Add(IsEnglish ? "eng" : "ita");
         if (IsExtraEu && !isSingleExtraEu) idList.Add("extraeu"); // the second condition is to avoid double extraeu
-        
+
         var id = string.Join("_", idList);
         return id;
     }
@@ -111,4 +108,4 @@ public void Merge(RankingOrder? rankingRankingOrder)
         Primary ??= rankingRankingOrder?.Primary;
         Secondary ??= rankingRankingOrder?.Secondary;
     }
-}
+}
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/StudentResult.cs b/PoliNetwork.Graduatorie.Parser/Objects/StudentResult.cs
index 267e800d..37d69a09 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/StudentResult.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/StudentResult.cs
@@ -3,6 +3,7 @@
 using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
 using PoliNetwork.Graduatorie.Common.Objects;
+using PoliNetwork.Graduatorie.Parser.Utils;
 
 #endregion
 
@@ -22,7 +23,7 @@ public class StudentResult
     public decimal? Result;
     public SortedDictionary<string, decimal>? SectionsResults;
 
-    public List<int?> GetHashWithoutLastUpdate()
+    public int GetHashWithoutLastUpdate()
     {
         var r = new List<int?>
         {
@@ -47,6 +48,6 @@ public class StudentResult
             r.Add(SectionsResults.Aggregate("SectionsResultsFull".GetHashCode(),
                 (current, variable) => current ^ variable.Key.GetHashCode() ^ variable.Value.GetHashCode()));
 
-        return r;
+        return Hashing.GetHashFromListHash(r);
     }
 }
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Tables/Course/CourseTable.cs b/PoliNetwork.Graduatorie.Parser/Objects/Tables/Course/CourseTable.cs
index 17aac09b..791c4b5e 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Tables/Course/CourseTable.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Tables/Course/CourseTable.cs
@@ -31,8 +31,8 @@ public RankingSummaryStudent GetRankingSummaryStudent(Ranking ranking)
     }
 
     /// <summary>
-    /// Get the course location if present, otherwise get the placeholder (constant).
-    /// Useful for index purposes.
+    ///     Get the course location if present, otherwise get the placeholder (constant).
+    ///     Useful for index purposes.
     /// </summary>
     /// <returns>A string with the location or the placeholder</returns>
     public string GetFixedLocation()
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Tables/Merit/MeritTable.cs b/PoliNetwork.Graduatorie.Parser/Objects/Tables/Merit/MeritTable.cs
index a796b4c5..1add9a7d 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Tables/Merit/MeritTable.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Tables/Merit/MeritTable.cs
@@ -17,7 +17,7 @@ public class MeritTable
     public List<StudentResult>? Rows;
     public int? Year;
 
-    public List<int?> GetHashWithoutLastUpdate()
+    public int GetHashWithoutLastUpdate()
     {
         var r = new List<int?> { "MeritTable".GetHashCode() };
         if (Headers != null)
@@ -30,14 +30,13 @@ public class MeritTable
             r.Add(Rows.Aggregate("RowsFull".GetHashCode(), (current, variable) =>
             {
                 var hashWithoutLastUpdate = variable.GetHashWithoutLastUpdate();
-                var hashFromListHash = Hashing.GetHashFromListHash(hashWithoutLastUpdate) ?? "empty3".GetHashCode();
-                return current ^ hashFromListHash;
+                return current ^ hashWithoutLastUpdate;
             }));
         else
             r.Add("RowsEmpty".GetHashCode());
 
         r.Add(Year?.GetHashCode() ?? "Year".GetHashCode());
         r.Add(Path?.GetHashCode() ?? "Path".GetHashCode());
-        return r;
+        return Hashing.GetHashFromListHash(r);
     }
 }
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Parser/Utils/Hashing.cs b/PoliNetwork.Graduatorie.Parser/Utils/Hashing.cs
index e71a7ceb..9d435101 100644
--- a/PoliNetwork.Graduatorie.Parser/Utils/Hashing.cs
+++ b/PoliNetwork.Graduatorie.Parser/Utils/Hashing.cs
@@ -2,13 +2,23 @@ namespace PoliNetwork.Graduatorie.Parser.Utils;
 
 public static class Hashing
 {
-    public static int? GetHashFromListHash(IReadOnlyCollection<int?>? iMerit)
+    public static int GetHashFromListHash(IReadOnlyCollection<int?>? iMerit)
     {
         if (iMerit == null)
-            return null;
+            return 0;
         if (iMerit.Count == 0)
-            return null;
+            return 0;
 
-        return iMerit.Aggregate(0, (current, variable) => current ^ variable ?? 0);
+        var hashFromListHash = iMerit.Aggregate(0, (current, variable) => current ^ variable ?? 0);
+        return hashFromListHash;
+    }
+
+    public static int GetHashFromListHash(List<int> iMerit)
+    {
+        if (iMerit.Count == 0)
+            return 0;
+
+        var hashFromListHash = iMerit.Aggregate(0, (current, variable) => current ^ variable);
+        return hashFromListHash;
     }
 }
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Parser/Utils/Output/OutputWriteUtil.cs b/PoliNetwork.Graduatorie.Parser/Utils/Output/OutputWriteUtil.cs
index f8dfad6f..f603a5c3 100644
--- a/PoliNetwork.Graduatorie.Parser/Utils/Output/OutputWriteUtil.cs
+++ b/PoliNetwork.Graduatorie.Parser/Utils/Output/OutputWriteUtil.cs
@@ -23,7 +23,7 @@ public OutputWriteUtil(ArgsConfig argsConfig)
     public void SaveOutputs(RankingsSet rankingsSet, DateFound dateFound)
     {
         var outFolder = Path.Join(_config.DataFolder, Constants.OutputFolder);
-        
+
         rankingsSet.WriteAllRankings(outFolder, _config.ForceReparsing);
         IndexJsonBase.WriteAllIndexes(rankingsSet, outFolder, _config);
         StatsJson.Write(outFolder, rankingsSet, _config);
diff --git a/PoliNetwork.Graduatorie.Parser/Utils/Transformer/ParserNS/Parser.cs b/PoliNetwork.Graduatorie.Parser/Utils/Transformer/ParserNS/Parser.cs
index da2585ac..b986614d 100644
--- a/PoliNetwork.Graduatorie.Parser/Utils/Transformer/ParserNS/Parser.cs
+++ b/PoliNetwork.Graduatorie.Parser/Utils/Transformer/ParserNS/Parser.cs
@@ -207,26 +207,27 @@ private RankingsSet ParseNewRankings(IReadOnlyCollection<HtmlPage> htmls)
         var extraEuStr = intestazioni[4].Split("\n")[0].ToLower();
         var isExtraEu = extraEuStr.Contains("extra-ue");
 
-        if (ranking.Year < 2024) {
+        if (ranking.Year < 2024)
+        {
             // layout valid until 2023
             var phase = string.Join(" ", intestazioni[3].Split(" - ")[1..]);
             ranking.RankingOrder = new RankingOrder(phase, isExtraEu);
             if (ranking.School == SchoolEnum.Architettura && ranking.RankingOrder.Primary == null &&
                 ranking.RankingOrder.Secondary == null && ranking.RankingOrder.IsExtraEu)
-            {
                 // this is a fallback for 2020-2023:
                 // POLIMI was used to add the ranking number (Secondary, e.g. "Prima Graduatoria") for ExtraEU starting 
                 // from the second ranking. 
                 // e.g. Extra-EU first ranking => phase = "Extra-ue",
                 //      Extra-EU second ranking => phase = "Extra-ue - Seconda Graduatoria"
                 // so this is a fallback to add the equivalent of "Prima Graduatoria" to the first ExtraEU ranking.
-                
                 ranking.RankingOrder.Secondary = 1;
-            }
-        } else {
+        }
+        else
+        {
             // layout valid since 2024 (if the layout changes again, make another else if)
             var phase = intestazioni[3];
-            var isEnglish = intestazioni[2].Contains("taught in english") || intestazioni[2].Contains("erogati in inglese");
+            var isEnglish = intestazioni[2].Contains("taught in english") ||
+                            intestazioni[2].Contains("erogati in inglese");
             ranking.RankingOrder = new RankingOrder(phase, isExtraEu, isEnglish);
         }
 
@@ -773,4 +774,4 @@ private IEnumerable<HtmlPage> ParseLocalHtmlFiles()
         );
         return obj2;
     }
-}
+}
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Scraper/Utils/Web/Scraper.cs b/PoliNetwork.Graduatorie.Scraper/Utils/Web/Scraper.cs
index 2dc91e58..f13f0154 100644
--- a/PoliNetwork.Graduatorie.Scraper/Utils/Web/Scraper.cs
+++ b/PoliNetwork.Graduatorie.Scraper/Utils/Web/Scraper.cs
@@ -40,7 +40,8 @@ private IEnumerable<string> ScrapeAvvisiFuturiStudenti()
         var page = _web.Load(AvvisiFuturiStudentiUrl).DocumentNode;
 
         var newsCards =
-            page.SelectNodes("//div[contains(@class, 'news')]//div[contains(@class, 'row--card')]//div[contains(@class, 'card__content')]");
+            page.SelectNodes(
+                "//div[contains(@class, 'news')]//div[contains(@class, 'row--card')]//div[contains(@class, 'card__content')]");
         if (newsCards == null) return links;
 
         foreach (var card in newsCards)
@@ -48,7 +49,7 @@ private IEnumerable<string> ScrapeAvvisiFuturiStudenti()
             var title = card.Descendants("h5").First();
             var titleValid = title != null && IsValidText(title.InnerText);
 
-            var body = card.Descendants("p").Where(el => el.ParentNode.HasClass("news-bodytext")).First();
+            var body = card.Descendants("p").First(el => el.ParentNode.HasClass("news-bodytext"));
             var bodyValid = body != null && IsValidText(body.InnerText);
 
             var aTag = card.Descendants("a").First();
@@ -134,4 +135,4 @@ private bool IsValidText(string text)
             return null;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Scraper/Utils/Web/UrlUtils.cs b/PoliNetwork.Graduatorie.Scraper/Utils/Web/UrlUtils.cs
index fcf0d953..30bffc81 100644
--- a/PoliNetwork.Graduatorie.Scraper/Utils/Web/UrlUtils.cs
+++ b/PoliNetwork.Graduatorie.Scraper/Utils/Web/UrlUtils.cs
@@ -40,4 +40,4 @@ public static bool CheckUrl(RankingUrl? url)
             return false;
         }
     }
-}
+}
\ No newline at end of file