diff --git a/TMI-practicum/SweepLineEffAlgorithm.cs b/TMI-practicum/SweepLineEffAlgorithm.cs
new file mode 100644
index 0000000..8aff49e
--- /dev/null
+++ b/TMI-practicum/SweepLineEffAlgorithm.cs
@@ -0,0 +1,13 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace TMI_practicum
+{
+    public static class SweepLineEffAlgorithm
+    {
+        public static IEnumerable<Intersection> Solve(IEnumerable<Circle> circles)
+        {
+            return null;
+        }
+    }
+}
\ No newline at end of file
diff --git a/TMI-practicum/TMI-practicum.csproj b/TMI-practicum/TMI-practicum.csproj
index 391d1a6..ce09dbb 100644
--- a/TMI-practicum/TMI-practicum.csproj
+++ b/TMI-practicum/TMI-practicum.csproj
@@ -50,6 +50,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="SimpleAlgorithm.cs" />
     <Compile Include="SweepLineAlgorithm.cs" />
+    <Compile Include="SweepLineEffAlgorithm.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />