feat: add comment on evaluation failure

submit.py

@@ -109,6 +109,9 @@ if __name__ == "__main__":
             if not judge_time: 
                 print("Submission %s is still in queue." % submission_id)
             else:
+                if score < 0:
+                    print("Submission %s for evaluation has failed. We are currently experiencing issues with the evaluation system. Please check official updates and try again later. This submission will not be counted into your quota." % submission_id)
+                    exit(0)
                 print("Submission %s score: %s" % (submission_id, score))
             exit(0)
         else: