add heatmap

contest/models.py

@@ -46,10 +46,13 @@ class Contest(models.Model):
 
     # 是否有权查看problem 的一些统计信息 诸如submission_number, accepted_number 等
     def problem_details_permission(self, user):
-        return self.rule_type == ContestRuleType.ACM or \
-               self.status == ContestStatus.CONTEST_ENDED or \
-               user.is_authenticated and user.is_contest_admin(self) or \
-               self.real_time_rank
+        return (
+            self.rule_type == ContestRuleType.ACM
+            or self.status == ContestStatus.CONTEST_ENDED
+            or user.is_authenticated
+            and user.is_contest_admin(self)
+            or self.real_time_rank
+        )
 
     class Meta:
         db_table = "contest"