diff --git a/contest/views.py b/contest/views.py
index 2153f95..60334f3 100644
--- a/contest/views.py
+++ b/contest/views.py
@@ -396,7 +396,7 @@ def _cmp(x, y):
 def contest_rank_page(request, contest_id):
     contest = Contest.objects.get(id=contest_id)
     contest_problems = ContestProblem.objects.filter(contest=contest).order_by("sort_index")
-    result = ContestSubmission.objects.values("user_id").annotate(total_submit=Count("user_id"))
+    result = ContestSubmission.objects.values("user_id").annotate(total_submit=Sum("total_submission_number"))
     for i in range(0, len(result)):
         # 这个人所有的提交
         submissions = ContestSubmission.objects.filter(user_id=result[i]["user_id"])
diff --git a/problem/views.py b/problem/views.py
index 6052ea9..b73085f 100644
--- a/problem/views.py
+++ b/problem/views.py
@@ -185,8 +185,12 @@ class TestCaseUploadAPIView(APIView):
             os.mkdir(test_case_dir)
             for name in l:
                 f = open(test_case_dir + name, "wb")
-                f.write(test_case_file.read(name).replace("\r\n", "\n"))
-                f.close()
+                try:
+                    f.write(test_case_file.read(name).replace("\r\n", "\n"))
+                except MemoryError:
+                    return error_response(u"单个测试数据体积过大!")
+                finally:
+                    f.close()
             l.sort()
 
             file_info = {"test_case_number": len(l) / 2, "test_cases": {}}