Add contestAPI.

contest/urls/admin.py

@@ -3,6 +3,6 @@ from django.conf.urls import url
 from ..views.admin import ContestAnnouncementAPI, ContestAPI
 
 urlpatterns = [
-    url(r"^contest/?$", ContestAPI.as_view(), name="contest_api"),
+    url(r"^contest/?$", ContestAPI.as_view(), name="contest_admin_api"),
     url(r"^contest/announcement/?$", ContestAnnouncementAPI.as_view(), name="contest_announcement_admin_api")
 ]

contest/urls/oj.py

@@ -1,7 +1,9 @@
 from django.conf.urls import url
 
-from ..views.oj import ContestAnnouncementListAPI
+from ..views.oj import ContestAnnouncementListAPI, ContestListAPI
 
 urlpatterns = [
-    url(r"^contest/?$", ContestAnnouncementListAPI.as_view(), name="contest_list_api"),
+    url(r"^contest/?$", ContestListAPI.as_view(), name="contest_api"),
+    url(r"^contest/announcement/?$", ContestAnnouncementListAPI.as_view(), name="contest_announcement_api"),
+
 ]