Refactor range combining logic for future reusability

AoC_2025/Day05.cs

@@ -104,14 +104,26 @@ public class Day05 : IPuzzleSolver<long>
             {
                 optimizedRanges.Add(range);
             }
-            else if (IsIdInRange(range.from, lastRange) && ! IsIdInRange(range.to, lastRange))
+            else if (TryCombineRanges(lastRange, range, out var combined))
             {
-                optimizedRanges[^1] = (lastRange.from, range.to);
+                optimizedRanges[^1] = combined;
             }
         }
 
         return optimizedRanges;
     }
+
+    private bool TryCombineRanges(Range first, Range second, out Range combined)
+    {
+        if (IsIdInRange(second.from, first) && !IsIdInRange(second.to, first))
+        {
+            combined = (first.from, second.to);
+            return true;
+        }
+
+        combined = first;
+        return false;
+    }
     
     private static IEnumerable<long> CountIdsInRanges(IEnumerable<Range> combinedRanges)
     {