slow but

api/app.py

@@ -45,7 +45,7 @@ def create_app() -> FastAPI:
         Evaluate the correctness of the solutions in the given samples data.
         """
         if parallel < 1:
-            n_workers = min(4, multiprocessing.cpu_count() // 2)
+            n_workers = min(2, multiprocessing.cpu_count() // 2)
             if n_workers < 1:
                 n_workers = 1