diff --git a/README.md b/README.md
index 8810aad..b7cff07 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 Silly solutions for silly problems.
 
+Every solution is O(1) because types don't exist at runtime.
+
 <img src="./ralf.gif" />
 
 ## Motivation
diff --git a/src/pages/index.astro b/src/pages/index.astro
index 2c944f1..33130fc 100644
--- a/src/pages/index.astro
+++ b/src/pages/index.astro
@@ -25,6 +25,13 @@ const allProblems = (await readdir(`${process.cwd()}/problems`)).map(
       </p>
     </div>
 
+    <div
+      class="mb-4 rounded-lg bg-gray-50 p-4 text-sm text-gray-800 dark:bg-gray-800 dark:text-gray-300"
+      role="alert"
+    >
+      Every solution is O(1) because types don't exist at runtime.
+    </div>
+
     <div class="flex flex-col gap-5">
       {allProblems.map((problem) => <ProblemView name={problem} />)}
     </div>