完成ACM ContestProblem相关判题逻辑

contest,submission等表默认-create_time排序

submission/urls/oj.py

@@ -1,8 +1,9 @@
 from django.conf.urls import url
 
-from ..views.oj import SubmissionAPI, SubmissionListAPI
+from ..views.oj import SubmissionAPI, SubmissionListAPI, ContestSubmissionListAPI
 
 urlpatterns = [
     url(r"^submission/?$", SubmissionAPI.as_view(), name="submission_api"),
     url(r"^submissions/?$", SubmissionListAPI.as_view(), name="submission_list_api"),
+    url(r"^contest/submissions/?$", ContestSubmissionListAPI.as_view(), name="contest_submission_list_api"),
 ]