fix

flowchart/views/oj.py

@@ -158,7 +158,10 @@ class FlowchartSubmissionDetailAPI(APIView):
             problem=problem,
             status=FlowchartSubmissionStatus.COMPLETED,
         ).order_by("create_time")
-        submission = submissions[page - 1]
+        if page == 0:
+            submission = submissions.last()
+        else:
+            submission = submissions[page - 1]
         serializer = FlowchartSubmissionSerializer(submission)
         return self.success({"submission": serializer.data})