diff --git a/judge/admin/contest.py b/judge/admin/contest.py
index 3ccad04..3a57793 100644
--- a/judge/admin/contest.py
+++ b/judge/admin/contest.py
@@ -158,7 +158,10 @@ class ContestAdmin(CompareVersionAdmin):
                 )
             },
         ),
-        (_("Scheduling"), {"fields": ("start_time", "end_time", "time_limit")}),
+        (
+            _("Scheduling"),
+            {"fields": ("start_time", "end_time", "time_limit", "freeze_after")},
+        ),
         (
             _("Details"),
             {
@@ -274,7 +277,8 @@ class ContestAdmin(CompareVersionAdmin):
         # We need this flag because `save_related` deals with the inlines, but does not know if we have already rescored
         self._rescored = False
         if form.changed_data and any(
-            f in form.changed_data for f in ("format_config", "format_name")
+            f in form.changed_data
+            for f in ("format_config", "format_name", "freeze_after")
         ):
             self._rescore(obj.key)
             self._rescored = True
diff --git a/judge/contest_format/atcoder.py b/judge/contest_format/atcoder.py
index 64e0749..db42b73 100644
--- a/judge/contest_format/atcoder.py
+++ b/judge/contest_format/atcoder.py
@@ -10,7 +10,7 @@ from django.utils.translation import gettext_lazy
 
 from judge.contest_format.default import DefaultContestFormat
 from judge.contest_format.registry import register_contest_format
-from judge.timezone import from_database_time
+from judge.timezone import from_database_time, to_database_time
 from judge.utils.timedelta import nice_repr
 
 
@@ -54,6 +54,10 @@ class AtCoderContestFormat(DefaultContestFormat):
         points = 0
         format_data = {}
 
+        frozen_time = self.contest.end_time
+        if self.contest.freeze_after:
+            frozen_time = participation.start + self.contest.freeze_after
+
         with connection.cursor() as cursor:
             cursor.execute(
                 """
@@ -66,9 +70,10 @@ class AtCoderContestFormat(DefaultContestFormat):
                 FROM judge_contestproblem cp INNER JOIN
                      judge_contestsubmission cs ON (cs.problem_id = cp.id AND cs.participation_id = %s) LEFT OUTER JOIN
                      judge_submission sub ON (sub.id = cs.submission_id)
+                WHERE sub.date < %s
                 GROUP BY cp.id
             """,
-                (participation.id, participation.id),
+                (participation.id, participation.id, to_database_time(frozen_time)),
             )
 
             for score, time, prob in cursor.fetchall():
@@ -100,6 +105,7 @@ class AtCoderContestFormat(DefaultContestFormat):
                 format_data[str(prob)] = {"time": dt, "points": score, "penalty": prev}
                 points += score
 
+        self.handle_frozen_state(participation, format_data)
         participation.cumtime = cumtime + penalty
         participation.score = points
         participation.tiebreaker = 0
@@ -114,7 +120,7 @@ class AtCoderContestFormat(DefaultContestFormat):
                     '<small style="color:red"> ({penalty})</small>',
                     penalty=floatformat(format_data["penalty"]),
                 )
-                if format_data["penalty"]
+                if format_data.get("penalty")
                 else ""
             )
             return format_html(
@@ -129,6 +135,7 @@ class AtCoderContestFormat(DefaultContestFormat):
                     + self.best_solution_state(
                         format_data["points"], contest_problem.points
                     )
+                    + (" frozen" if format_data.get("frozen") else "")
                 ),
                 url=reverse(
                     "contest_user_submissions_ajax",
diff --git a/judge/contest_format/base.py b/judge/contest_format/base.py
index f27f2ac..848d81d 100644
--- a/judge/contest_format/base.py
+++ b/judge/contest_format/base.py
@@ -1,4 +1,5 @@
 from abc import ABCMeta, abstractmethod, abstractproperty
+from django.db.models import Max
 
 
 class abstractclassmethod(classmethod):
@@ -95,3 +96,17 @@ class BaseContestFormat(metaclass=ABCMeta):
         if points == total:
             return "full-score"
         return "partial-score"
+
+    def handle_frozen_state(self, participation, format_data):
+        if not self.contest.freeze_after:
+            return
+        queryset = participation.submissions.values("problem_id").annotate(
+            time=Max("submission__date")
+        )
+        for result in queryset:
+            problem = str(result["problem_id"])
+            if format_data.get(problem):
+                if result["time"] >= self.contest.freeze_after + participation.start:
+                    format_data[problem]["frozen"] = True
+            else:
+                format_data[problem] = {"time": 0, "points": 0, "frozen": True}
diff --git a/judge/contest_format/default.py b/judge/contest_format/default.py
index 0c053e0..d8dd848 100644
--- a/judge/contest_format/default.py
+++ b/judge/contest_format/default.py
@@ -32,10 +32,19 @@ class DefaultContestFormat(BaseContestFormat):
         points = 0
         format_data = {}
 
-        for result in participation.submissions.values("problem_id").annotate(
+        queryset = participation.submissions
+
+        if self.contest.freeze_after:
+            queryset = queryset.filter(
+                submission__date__lt=participation.start + self.contest.freeze_after
+            )
+
+        queryset = queryset.values("problem_id").annotate(
             time=Max("submission__date"),
             points=Max("points"),
-        ):
+        )
+
+        for result in queryset:
             dt = (result["time"] - participation.start).total_seconds()
             if result["points"]:
                 cumtime += dt
@@ -45,6 +54,7 @@ class DefaultContestFormat(BaseContestFormat):
             }
             points += result["points"]
 
+        self.handle_frozen_state(participation, format_data)
         participation.cumtime = max(cumtime, 0)
         participation.score = points
         participation.tiebreaker = 0
@@ -66,6 +76,7 @@ class DefaultContestFormat(BaseContestFormat):
                     + self.best_solution_state(
                         format_data["points"], contest_problem.points
                     )
+                    + (" frozen" if format_data.get("frozen") else "")
                 ),
                 url=reverse(
                     "contest_user_submissions_ajax",
diff --git a/judge/contest_format/ecoo.py b/judge/contest_format/ecoo.py
index 007498c..149d00a 100644
--- a/judge/contest_format/ecoo.py
+++ b/judge/contest_format/ecoo.py
@@ -10,7 +10,7 @@ from django.utils.translation import gettext_lazy
 
 from judge.contest_format.default import DefaultContestFormat
 from judge.contest_format.registry import register_contest_format
-from judge.timezone import from_database_time
+from judge.timezone import from_database_time, to_database_time
 from judge.utils.timedelta import nice_repr
 
 
@@ -60,6 +60,10 @@ class ECOOContestFormat(DefaultContestFormat):
         points = 0
         format_data = {}
 
+        frozen_time = self.contest.end_time
+        if self.contest.freeze_after:
+            frozen_time = participation.start + self.contest.freeze_after
+
         with connection.cursor() as cursor:
             cursor.execute(
                 """
@@ -77,9 +81,15 @@ class ECOOContestFormat(DefaultContestFormat):
                 FROM judge_contestproblem cp INNER JOIN
                      judge_contestsubmission cs ON (cs.problem_id = cp.id AND cs.participation_id = %s) LEFT OUTER JOIN
                      judge_submission sub ON (sub.id = cs.submission_id)
+                WHERE sub.date < %s
                 GROUP BY cp.id
             """,
-                (participation.id, participation.id, participation.id),
+                (
+                    participation.id,
+                    participation.id,
+                    participation.id,
+                    to_database_time(frozen_time),
+                ),
             )
 
             for score, time, prob, subs, max_score in cursor.fetchall():
@@ -105,6 +115,7 @@ class ECOOContestFormat(DefaultContestFormat):
                 format_data[str(prob)] = {"time": dt, "points": score, "bonus": bonus}
                 points += score
 
+        self.handle_frozen_state(participation, format_data)
         participation.cumtime = cumtime
         participation.score = points
         participation.tiebreaker = 0
@@ -134,6 +145,7 @@ class ECOOContestFormat(DefaultContestFormat):
                     + self.best_solution_state(
                         format_data["points"], contest_problem.points
                     )
+                    + (" frozen" if format_data.get("frozen") else "")
                 ),
                 url=reverse(
                     "contest_user_submissions_ajax",
diff --git a/judge/contest_format/icpc.py b/judge/contest_format/icpc.py
index aa76484..b366b01 100644
--- a/judge/contest_format/icpc.py
+++ b/judge/contest_format/icpc.py
@@ -10,7 +10,7 @@ from django.utils.translation import gettext_lazy
 
 from judge.contest_format.default import DefaultContestFormat
 from judge.contest_format.registry import register_contest_format
-from judge.timezone import from_database_time
+from judge.timezone import from_database_time, to_database_time
 from judge.utils.timedelta import nice_repr
 
 
@@ -55,6 +55,10 @@ class ICPCContestFormat(DefaultContestFormat):
         score = 0
         format_data = {}
 
+        frozen_time = self.contest.end_time
+        if self.contest.freeze_after:
+            frozen_time = participation.start + self.contest.freeze_after
+
         with connection.cursor() as cursor:
             cursor.execute(
                 """
@@ -67,9 +71,10 @@ class ICPCContestFormat(DefaultContestFormat):
                 FROM judge_contestproblem cp INNER JOIN
                      judge_contestsubmission cs ON (cs.problem_id = cp.id AND cs.participation_id = %s) LEFT OUTER JOIN
                      judge_submission sub ON (sub.id = cs.submission_id)
+                WHERE sub.date < %s
                 GROUP BY cp.id
             """,
-                (participation.id, participation.id),
+                (participation.id, participation.id, to_database_time(frozen_time)),
             )
 
             for points, time, prob in cursor.fetchall():
@@ -102,6 +107,7 @@ class ICPCContestFormat(DefaultContestFormat):
                 format_data[str(prob)] = {"time": dt, "points": points, "penalty": prev}
                 score += points
 
+        self.handle_frozen_state(participation, format_data)
         participation.cumtime = max(0, cumtime + penalty)
         participation.score = score
         participation.tiebreaker = last  # field is sorted from least to greatest
@@ -116,7 +122,7 @@ class ICPCContestFormat(DefaultContestFormat):
                     '<small style="color:red"> +{penalty}</small>',
                     penalty=floatformat(format_data["penalty"]),
                 )
-                if format_data["penalty"]
+                if format_data.get("penalty")
                 else ""
             )
             return format_html(
@@ -131,6 +137,7 @@ class ICPCContestFormat(DefaultContestFormat):
                     + self.best_solution_state(
                         format_data["points"], contest_problem.points
                     )
+                    + (" frozen" if format_data.get("frozen") else "")
                 ),
                 url=reverse(
                     "contest_user_submissions_ajax",
diff --git a/judge/contest_format/ioi.py b/judge/contest_format/ioi.py
index 9275f78..bcd18c3 100644
--- a/judge/contest_format/ioi.py
+++ b/judge/contest_format/ioi.py
@@ -12,6 +12,7 @@ from judge.contest_format.default import DefaultContestFormat
 from judge.contest_format.registry import register_contest_format
 from judge.timezone import from_database_time
 from judge.utils.timedelta import nice_repr
+from django.db.models import Min, OuterRef, Subquery
 
 
 @register_contest_format("ioi")
@@ -45,41 +46,42 @@ class IOIContestFormat(DefaultContestFormat):
 
     def update_participation(self, participation):
         cumtime = 0
-        points = 0
+        score = 0
         format_data = {}
 
-        with connection.cursor() as cursor:
-            cursor.execute(
-                """
-            SELECT MAX(cs.points) as `score`, (
-                SELECT MIN(csub.date)
-                    FROM judge_contestsubmission ccs LEFT OUTER JOIN
-                         judge_submission csub ON (csub.id = ccs.submission_id)
-                    WHERE ccs.problem_id = cp.id AND ccs.participation_id = %s AND ccs.points = MAX(cs.points)
-            ) AS `time`, cp.id AS `prob`
-            FROM judge_contestproblem cp INNER JOIN
-                 judge_contestsubmission cs ON (cs.problem_id = cp.id AND cs.participation_id = %s) LEFT OUTER JOIN
-                 judge_submission sub ON (sub.id = cs.submission_id)
-            GROUP BY cp.id
-            """,
-                (participation.id, participation.id),
+        queryset = participation.submissions
+        if self.contest.freeze_after:
+            queryset = queryset.filter(
+                submission__date__lt=participation.start + self.contest.freeze_after
             )
 
-            for score, time, prob in cursor.fetchall():
-                if self.config["cumtime"]:
-                    dt = (
-                        from_database_time(time) - participation.start
-                    ).total_seconds()
-                    if score:
-                        cumtime += dt
-                else:
-                    dt = 0
+        queryset = (
+            queryset.values("problem_id")
+            .filter(
+                points=Subquery(
+                    queryset.filter(problem_id=OuterRef("problem_id"))
+                    .order_by("-points")
+                    .values("points")[:1]
+                )
+            )
+            .annotate(time=Min("submission__date"))
+            .values_list("problem_id", "time", "points")
+        )
 
-                format_data[str(prob)] = {"time": dt, "points": score}
-                points += score
+        for problem_id, time, points in queryset:
+            if self.config["cumtime"]:
+                dt = (time - participation.start).total_seconds()
+                if points:
+                    cumtime += dt
+            else:
+                dt = 0
 
+            format_data[str(problem_id)] = {"points": points, "time": dt}
+            score += points
+
+        self.handle_frozen_state(participation, format_data)
         participation.cumtime = max(cumtime, 0)
-        participation.score = points
+        participation.score = score
         participation.tiebreaker = 0
         participation.format_data = format_data
         participation.save()
@@ -99,6 +101,7 @@ class IOIContestFormat(DefaultContestFormat):
                     + self.best_solution_state(
                         format_data["points"], contest_problem.points
                     )
+                    + (" frozen" if format_data.get("frozen") else "")
                 ),
                 url=reverse(
                     "contest_user_submissions_ajax",
diff --git a/judge/migrations/0139_contest_freeze_after.py b/judge/migrations/0139_contest_freeze_after.py
new file mode 100644
index 0000000..97e4a25
--- /dev/null
+++ b/judge/migrations/0139_contest_freeze_after.py
@@ -0,0 +1,23 @@
+# Generated by Django 3.2.16 on 2022-11-18 06:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("judge", "0138_bookmark_makebookmark"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="contest",
+            name="freeze_after",
+            field=models.DurationField(
+                blank=True,
+                help_text="Format hh:mm:ss. For example, if you want to freeze contest after 2 hours, enter 02:00:00",
+                null=True,
+                verbose_name="freeze after",
+            ),
+        ),
+    ]
diff --git a/judge/models/contest.py b/judge/models/contest.py
index 1cd5795..0a7389b 100644
--- a/judge/models/contest.py
+++ b/judge/models/contest.py
@@ -128,6 +128,14 @@ class Contest(models.Model):
             "Format hh:mm:ss. For example, if you want a 2-hour contest, enter 02:00:00"
         ),
     )
+    freeze_after = models.DurationField(
+        verbose_name=_("freeze after"),
+        blank=True,
+        null=True,
+        help_text=_(
+            "Format hh:mm:ss. For example, if you want to freeze contest after 2 hours, enter 02:00:00"
+        ),
+    )
     is_visible = models.BooleanField(
         verbose_name=_("publicly visible"),
         default=False,
diff --git a/judge/timezone.py b/judge/timezone.py
index c3b5b04..c609649 100644
--- a/judge/timezone.py
+++ b/judge/timezone.py
@@ -2,7 +2,7 @@ import pytz
 from django.conf import settings
 from django.db import connection
 from django.utils import timezone
-from django.utils.timezone import make_aware
+from django.utils.timezone import make_aware, make_naive
 
 
 class TimezoneMiddleware(object):
@@ -25,3 +25,10 @@ def from_database_time(datetime):
     if tz is None:
         return datetime
     return make_aware(datetime, tz)
+
+
+def to_database_time(datetime):
+    tz = connection.timezone
+    if tz is None:
+        return datetime
+    return make_naive(datetime, tz)
diff --git a/judge/views/submission.py b/judge/views/submission.py
index 13b4651..3b22820 100644
--- a/judge/views/submission.py
+++ b/judge/views/submission.py
@@ -301,6 +301,7 @@ class SubmissionsListBase(DiggPaginatorMixin, TitleMixin, ListView):
     template_name = "submission/list.html"
     context_object_name = "submissions"
     first_page_href = None
+    include_frozen = False
 
     def get_result_data(self):
         result = self._get_result_data()
@@ -344,6 +345,10 @@ class SubmissionsListBase(DiggPaginatorMixin, TitleMixin, ListView):
             queryset = queryset.filter(contest_object=self.contest)
             if not self.contest.can_see_full_scoreboard(self.request.user):
                 queryset = queryset.filter(user=self.request.profile)
+            if self.contest.freeze_after and not self.include_frozen:
+                queryset = queryset.exclude(
+                    date__gte=self.contest.freeze_after + self.contest.start_time
+                )
         else:
             queryset = queryset.select_related("contest_object").defer(
                 "contest_object__description"
@@ -456,6 +461,9 @@ class SubmissionsListBase(DiggPaginatorMixin, TitleMixin, ListView):
         self.selected_languages = set(request.GET.getlist("language"))
         self.selected_statuses = set(request.GET.getlist("status"))
 
+        if request.user.is_superuser:
+            self.include_frozen = True
+
         if "results" in request.GET:
             return JsonResponse(self.get_result_data())
 
@@ -468,6 +476,8 @@ class UserMixin(object):
             raise ImproperlyConfigured("Must pass a user")
         self.profile = get_object_or_404(Profile, user__username=kwargs["user"])
         self.username = kwargs["user"]
+        if self.profile == request.profile:
+            self.include_frozen = True
         return super(UserMixin, self).get(request, *args, **kwargs)
 
 
@@ -837,8 +847,8 @@ class UserContestSubmissionsAjax(UserContestSubmissions):
                 s.contest_time = nice_repr(contest_time, "noday")
             else:
                 s.contest_time = None
-            points = floatformat(s.contest.points, -self.contest.points_precision)
             total = floatformat(contest_problem.points, -self.contest.points_precision)
+            points = floatformat(s.contest.points, -self.contest.points_precision)
             s.display_point = f"{points} / {total}"
             filtered_submissions.append(s)
         context["submissions"] = filtered_submissions
diff --git a/locale/vi/LC_MESSAGES/django.po b/locale/vi/LC_MESSAGES/django.po
index c9b34f3..800e099 100644
--- a/locale/vi/LC_MESSAGES/django.po
+++ b/locale/vi/LC_MESSAGES/django.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: lqdoj2\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-11-18 05:10+0700\n"
+"POT-Creation-Date: 2022-11-19 03:12+0700\n"
 "PO-Revision-Date: 2021-07-20 03:44\n"
 "Last-Translator: Icyene\n"
 "Language-Team: Vietnamese\n"
@@ -19,8 +19,8 @@ msgstr ""
 "X-Crowdin-File-ID: 5\n"
 
 #: chat_box/models.py:31 chat_box/models.py:51 chat_box/models.py:65
-#: judge/admin/interface.py:150 judge/models/contest.py:622
-#: judge/models/contest.py:815 judge/models/profile.py:354
+#: judge/admin/interface.py:150 judge/models/contest.py:630
+#: judge/models/contest.py:823 judge/models/profile.py:354
 #: judge/models/profile.py:430
 msgid "user"
 msgstr "người dùng"
@@ -99,72 +99,72 @@ msgstr "Bài tập"
 msgid "Settings"
 msgstr "Cài đặt"
 
-#: judge/admin/contest.py:161
+#: judge/admin/contest.py:162
 msgid "Scheduling"
 msgstr ""
 
-#: judge/admin/contest.py:163
+#: judge/admin/contest.py:166
 msgid "Details"
 msgstr "Chi tiết"
 
-#: judge/admin/contest.py:175
+#: judge/admin/contest.py:178
 msgid "Format"
 msgstr "Thể thức"
 
-#: judge/admin/contest.py:179 templates/contest/ranking-table.html:7
+#: judge/admin/contest.py:182 templates/contest/ranking-table.html:7
 #: templates/user/user-about.html:15 templates/user/user-about.html:45
 msgid "Rating"
 msgstr ""
 
-#: judge/admin/contest.py:191
+#: judge/admin/contest.py:194
 msgid "Access"
 msgstr "Truy cập"
 
-#: judge/admin/contest.py:201 judge/admin/problem.py:219
+#: judge/admin/contest.py:204 judge/admin/problem.py:219
 msgid "Justice"
 msgstr "Xử phạt"
 
-#: judge/admin/contest.py:313
+#: judge/admin/contest.py:317
 #, python-format
 msgid "%d contest successfully marked as visible."
 msgid_plural "%d contests successfully marked as visible."
 msgstr[0] "%d kỳ thi đã được đánh dấu hiển thị."
 
-#: judge/admin/contest.py:320
+#: judge/admin/contest.py:324
 msgid "Mark contests as visible"
 msgstr "Đánh dấu hiển thị các kỳ thi"
 
-#: judge/admin/contest.py:331
+#: judge/admin/contest.py:335
 #, python-format
 msgid "%d contest successfully marked as hidden."
 msgid_plural "%d contests successfully marked as hidden."
 msgstr[0] "%d kỳ thi đã được đánh dấu ẩn."
 
-#: judge/admin/contest.py:338
+#: judge/admin/contest.py:342
 msgid "Mark contests as hidden"
 msgstr "Ẩn các kỳ thi"
 
-#: judge/admin/contest.py:359 judge/admin/submission.py:243
+#: judge/admin/contest.py:363 judge/admin/submission.py:243
 #, python-format
 msgid "%d submission was successfully scheduled for rejudging."
 msgid_plural "%d submissions were successfully scheduled for rejudging."
 msgstr[0] "%d bài nộp đã được lên lịch thành công để chấm lại."
 
-#: judge/admin/contest.py:467
+#: judge/admin/contest.py:471
 #, python-format
 msgid "%d participation recalculated."
 msgid_plural "%d participations recalculated."
 msgstr[0] "%d thí sinh đã được tính điểm lại."
 
-#: judge/admin/contest.py:474
+#: judge/admin/contest.py:478
 msgid "Recalculate results"
 msgstr "Tính toán lại kết quả"
 
-#: judge/admin/contest.py:479 judge/admin/organization.py:99
+#: judge/admin/contest.py:483 judge/admin/organization.py:99
 msgid "username"
 msgstr "tên đăng nhập"
 
-#: judge/admin/contest.py:485 templates/base.html:315
+#: judge/admin/contest.py:489 templates/base.html:315
 msgid "virtual"
 msgstr "ảo"
 
@@ -567,13 +567,13 @@ msgstr "Lưu"
 msgid "bookmarks"
 msgstr "Lưu"
 
-#: judge/models/bookmark.py:56
+#: judge/models/bookmark.py:59
 #, fuzzy
 #| msgid "Bookmark"
 msgid "make bookmark"
 msgstr "Lưu"
 
-#: judge/models/bookmark.py:57
+#: judge/models/bookmark.py:60
 #, fuzzy
 #| msgid "Bookmark"
 msgid "make bookmarks"
@@ -696,7 +696,7 @@ msgstr ""
 msgid "contest tag"
 msgstr ""
 
-#: judge/models/contest.py:74 judge/models/contest.py:234
+#: judge/models/contest.py:74 judge/models/contest.py:242
 msgid "contest tags"
 msgstr "nhãn kỳ thi"
 
@@ -751,7 +751,7 @@ msgstr "mô tả"
 msgid "problems"
 msgstr "bài tập"
 
-#: judge/models/contest.py:121 judge/models/contest.py:627
+#: judge/models/contest.py:121 judge/models/contest.py:635
 msgid "start time"
 msgstr "thời gian bắt đầu"
 
@@ -771,11 +771,23 @@ msgstr ""
 "Định dạng hh:mm:ss (giờ:phút:giây). Ví dụ, nếu muốn tạo kỳ thi dài 2h, hãy "
 "nhập 02:00:00"
 
-#: judge/models/contest.py:132 judge/models/problem.py:222
+#: judge/models/contest.py:132
+msgid "freeze after"
+msgstr "đóng băng sau"
+
+#: judge/models/contest.py:136
+msgid ""
+"Format hh:mm:ss. For example, if you want to freeze contest after 2 hours, "
+"enter 02:00:00"
+msgstr ""
+"Định dạng hh:mm:ss (giờ:phút:giây). Ví dụ, nếu muốn đóng băng kỳ thi sau 2h, hãy "
+"nhập 02:00:00"
+
+#: judge/models/contest.py:140 judge/models/problem.py:222
 msgid "publicly visible"
 msgstr "công khai"
 
-#: judge/models/contest.py:135
+#: judge/models/contest.py:143
 msgid ""
 "Should be set even for organization-private contests, where it determines "
 "whether the contest is visible to members of the specified organizations."
@@ -783,84 +795,84 @@ msgstr ""
 "Đánh dấu ngay cả với các kỳ thi riêng tư của nhóm, quyết định việc kỳ thi có "
 "được hiển thị với các thành viên hay không."
 
-#: judge/models/contest.py:141
+#: judge/models/contest.py:149
 msgid "contest rated"
 msgstr "kỳ thi được xếp hạng"
 
-#: judge/models/contest.py:142
+#: judge/models/contest.py:150
 msgid "Whether this contest can be rated."
 msgstr "Quyết định kỳ thi có được xếp hạng không."
 
-#: judge/models/contest.py:146
+#: judge/models/contest.py:154
 msgid "scoreboard visibility"
 msgstr "khả năng hiển thị của bảng điểm"
 
-#: judge/models/contest.py:149
+#: judge/models/contest.py:157
 msgid "Scoreboard visibility through the duration of the contest"
 msgstr "Khả năng hiển thị của bảng điểm trong thời gian kỳ thi"
 
-#: judge/models/contest.py:154
+#: judge/models/contest.py:162
 msgid "view contest scoreboard"
 msgstr "xem bảng điểm kỳ thi"
 
-#: judge/models/contest.py:157
+#: judge/models/contest.py:165
 msgid "These users will be able to view the scoreboard."
 msgstr "Những người dùng này được phép xem bảng điểm."
 
-#: judge/models/contest.py:160
+#: judge/models/contest.py:168
 msgid "no comments"
 msgstr "không bình luận"
 
-#: judge/models/contest.py:161
+#: judge/models/contest.py:169
 msgid "Use clarification system instead of comments."
 msgstr "Dùng hệ thống thông báo thay vì bình luận."
 
-#: judge/models/contest.py:166
+#: judge/models/contest.py:174
 msgid "Rating floor for contest"
 msgstr "Cận dưới rating được xếp hạng trong kỳ thi"
 
-#: judge/models/contest.py:172
+#: judge/models/contest.py:180
 msgid "Rating ceiling for contest"
 msgstr "Cận trên rating được xếp hạng trong kỳ thi"
 
-#: judge/models/contest.py:177
+#: judge/models/contest.py:185
 msgid "rate all"
 msgstr "xếp hạng tất cả"
 
-#: judge/models/contest.py:178
+#: judge/models/contest.py:186
 msgid "Rate all users who joined."
 msgstr "Xếp hạng tất cả người dùng đã tham gia (kể cả không nộp)."
 
-#: judge/models/contest.py:183
+#: judge/models/contest.py:191
 msgid "exclude from ratings"
 msgstr "không xếp hạng"
 
-#: judge/models/contest.py:188
+#: judge/models/contest.py:196
 msgid "private to specific users"
 msgstr "riêng tư với các người dùng này"
 
-#: judge/models/contest.py:193
+#: judge/models/contest.py:201
 msgid "private contestants"
 msgstr "thí sinh riêng tư"
 
-#: judge/models/contest.py:194
+#: judge/models/contest.py:202
 msgid "If private, only these users may see the contest"
 msgstr "Nếu riêng tư, chỉ những người dùng này mới thấy kỳ thi"
 
-#: judge/models/contest.py:198
+#: judge/models/contest.py:206
 msgid "hide problem tags"
 msgstr "ẩn nhãn kỳ thi"
 
-#: judge/models/contest.py:199
+#: judge/models/contest.py:207
 msgid "Whether problem tags should be hidden by default."
 msgstr ""
 "Quyết định việc nhãn bài tập (DP, Tham lam, ...) được ẩn trong kỳ thi không."
 
-#: judge/models/contest.py:203
+#: judge/models/contest.py:211
 msgid "run pretests only"
 msgstr "chỉ chạy pretests"
 
-#: judge/models/contest.py:205
+#: judge/models/contest.py:213
 msgid ""
 "Whether judges should grade pretests only, versus all testcases. Commonly "
 "set during a contest, then unset prior to rejudging user submissions when "
@@ -869,50 +881,50 @@ msgstr ""
 "Quyết định việc các máy chấm chỉ chấm pretests thay vì tất cả các test. Sau "
 "kỳ thi, hãy bỏ đánh dấu ô này và chấm lại tất cả các bài."
 
-#: judge/models/contest.py:212 judge/models/interface.py:92
+#: judge/models/contest.py:220 judge/models/interface.py:92
 #: judge/models/problem.py:279
 msgid "private to organizations"
 msgstr "riêng tư với các tổ chức"
 
-#: judge/models/contest.py:217 judge/models/interface.py:88
+#: judge/models/contest.py:225 judge/models/interface.py:88
 #: judge/models/problem.py:275 judge/models/profile.py:126
 msgid "organizations"
 msgstr "tổ chức"
 
-#: judge/models/contest.py:218
+#: judge/models/contest.py:226
 msgid "If private, only these organizations may see the contest"
 msgstr "Nếu riêng tư, chỉ những tổ chức này thấy được kỳ thi"
 
-#: judge/models/contest.py:221 judge/models/problem.py:253
+#: judge/models/contest.py:229 judge/models/problem.py:253
 msgid "OpenGraph image"
 msgstr "Hình ảnh OpenGraph"
 
-#: judge/models/contest.py:224 judge/models/profile.py:81
+#: judge/models/contest.py:232 judge/models/profile.py:81
 msgid "Logo override image"
 msgstr "Hình ảnh ghi đè logo"
 
-#: judge/models/contest.py:229
+#: judge/models/contest.py:237
 msgid ""
 "This image will replace the default site logo for users inside the contest."
 msgstr "Ảnh này sẽ thay thế cho logo mặc định trong kỳ thi."
 
-#: judge/models/contest.py:237
+#: judge/models/contest.py:245
 msgid "the amount of live participants"
 msgstr "số lượng thí sinh thi trực tiếp"
 
-#: judge/models/contest.py:241
+#: judge/models/contest.py:249
 msgid "contest summary"
 msgstr "tổng kết kỳ thi"
 
-#: judge/models/contest.py:243 judge/models/problem.py:259
+#: judge/models/contest.py:251 judge/models/problem.py:259
 msgid "Plain-text, shown in meta description tag, e.g. for social media."
 msgstr ""
 
-#: judge/models/contest.py:247 judge/models/profile.py:76
+#: judge/models/contest.py:255 judge/models/profile.py:76
 msgid "access code"
 msgstr "mật khẩu truy cập"
 
-#: judge/models/contest.py:252
+#: judge/models/contest.py:260
 msgid ""
 "An optional code to prompt contestants before they are allowed to join the "
 "contest. Leave it blank to disable."
@@ -920,267 +932,267 @@ msgstr ""
 "Mật khẩu truy cập cho các thí sinh muốn tham gia kỳ thi. Để trống nếu không "
 "dùng."
 
-#: judge/models/contest.py:258 judge/models/problem.py:241
+#: judge/models/contest.py:266 judge/models/problem.py:241
 msgid "personae non gratae"
 msgstr "Chặn tham gia"
 
-#: judge/models/contest.py:260
+#: judge/models/contest.py:268
 msgid "Bans the selected users from joining this contest."
 msgstr "Cấm những người dùng được chọn tham gia kỳ thi."
 
-#: judge/models/contest.py:263
+#: judge/models/contest.py:271
 msgid "contest format"
 msgstr "format kỳ thi"
 
-#: judge/models/contest.py:267
+#: judge/models/contest.py:275
 msgid "The contest format module to use."
 msgstr "Format kỳ thi sử dụng."
 
-#: judge/models/contest.py:270
+#: judge/models/contest.py:278
 msgid "contest format configuration"
 msgstr "Tùy chỉnh format kỳ thi"
 
-#: judge/models/contest.py:274
+#: judge/models/contest.py:282
 msgid ""
 "A JSON object to serve as the configuration for the chosen contest format "
 "module. Leave empty to use None. Exact format depends on the contest format "
 "selected."
 msgstr ""
 
-#: judge/models/contest.py:287
+#: judge/models/contest.py:295
 msgid "precision points"
 msgstr "Hiển thị điểm"
 
-#: judge/models/contest.py:290
+#: judge/models/contest.py:298
 msgid "Number of digits to round points to."
 msgstr "Số chữ số thập phân trên bảng điểm."
 
-#: judge/models/contest.py:595
+#: judge/models/contest.py:603
 msgid "See private contests"
 msgstr ""
 
-#: judge/models/contest.py:596
+#: judge/models/contest.py:604
 msgid "Edit own contests"
 msgstr ""
 
-#: judge/models/contest.py:597
+#: judge/models/contest.py:605
 msgid "Edit all contests"
 msgstr ""
 
-#: judge/models/contest.py:598
+#: judge/models/contest.py:606
 msgid "Clone contest"
 msgstr ""
 
-#: judge/models/contest.py:599 templates/contest/moss.html:74
+#: judge/models/contest.py:607 templates/contest/moss.html:74
 msgid "MOSS contest"
 msgstr ""
 
-#: judge/models/contest.py:600
+#: judge/models/contest.py:608
 msgid "Rate contests"
 msgstr ""
 
-#: judge/models/contest.py:601
+#: judge/models/contest.py:609
 msgid "Contest access codes"
 msgstr ""
 
-#: judge/models/contest.py:602
+#: judge/models/contest.py:610
 msgid "Create private contests"
 msgstr ""
 
-#: judge/models/contest.py:603
+#: judge/models/contest.py:611
 msgid "Change contest visibility"
 msgstr ""
 
-#: judge/models/contest.py:604
+#: judge/models/contest.py:612
 msgid "Edit contest problem label script"
 msgstr "Cách hiển thị thứ tự bài tập"
 
-#: judge/models/contest.py:606 judge/models/contest.py:744
-#: judge/models/contest.py:818 judge/models/contest.py:848
+#: judge/models/contest.py:614 judge/models/contest.py:752
+#: judge/models/contest.py:826 judge/models/contest.py:856
 #: judge/models/submission.py:116
 msgid "contest"
 msgstr "kỳ thi"
 
-#: judge/models/contest.py:607
+#: judge/models/contest.py:615
 msgid "contests"
 msgstr "kỳ thi"
 
-#: judge/models/contest.py:616
+#: judge/models/contest.py:624
 msgid "associated contest"
 msgstr ""
 
-#: judge/models/contest.py:629
+#: judge/models/contest.py:637
 msgid "score"
 msgstr "điểm"
 
-#: judge/models/contest.py:630
+#: judge/models/contest.py:638
 msgid "cumulative time"
 msgstr "tổng thời gian"
 
-#: judge/models/contest.py:632
+#: judge/models/contest.py:640
 msgid "is disqualified"
 msgstr "đã bị loại"
 
-#: judge/models/contest.py:634
+#: judge/models/contest.py:642
 msgid "Whether this participation is disqualified."
 msgstr "Quyết định thí sinh có bị loại không."
 
-#: judge/models/contest.py:636
+#: judge/models/contest.py:644
 msgid "tie-breaking field"
 msgstr ""
 
-#: judge/models/contest.py:638
+#: judge/models/contest.py:646
 msgid "virtual participation id"
 msgstr "id lần tham gia ảo"
 
-#: judge/models/contest.py:640
+#: judge/models/contest.py:648
 msgid "0 means non-virtual, otherwise the n-th virtual participation."
 msgstr "0 nghĩa là tham gia chính thức, ngược lại là lần tham gia ảo thứ n."
 
-#: judge/models/contest.py:643
+#: judge/models/contest.py:651
 msgid "contest format specific data"
 msgstr ""
 
-#: judge/models/contest.py:719
+#: judge/models/contest.py:727
 #, python-format
 msgid "%s spectating in %s"
 msgstr "%s đang theo dõi trong %s"
 
-#: judge/models/contest.py:724
+#: judge/models/contest.py:732
 #, python-format
 msgid "%s in %s, v%d"
 msgstr "%s trong %s, v%d"
 
-#: judge/models/contest.py:729
+#: judge/models/contest.py:737
 #, python-format
 msgid "%s in %s"
 msgstr "%s trong %s"
 
-#: judge/models/contest.py:732
+#: judge/models/contest.py:740
 msgid "contest participation"
 msgstr "lần tham gia kỳ thi"
 
-#: judge/models/contest.py:733
+#: judge/models/contest.py:741
 msgid "contest participations"
 msgstr "lần tham gia kỳ thi"
 
-#: judge/models/contest.py:740 judge/models/contest.py:789
-#: judge/models/contest.py:851 judge/models/problem.py:558
+#: judge/models/contest.py:748 judge/models/contest.py:797
+#: judge/models/contest.py:859 judge/models/problem.py:558
 #: judge/models/problem.py:565 judge/models/problem.py:586
 #: judge/models/problem.py:617 judge/models/problem_data.py:50
 msgid "problem"
 msgstr "bài tập"
 
-#: judge/models/contest.py:748 judge/models/contest.py:801
+#: judge/models/contest.py:756 judge/models/contest.py:809
 #: judge/models/problem.py:206
 msgid "points"
 msgstr "điểm"
 
-#: judge/models/contest.py:749
+#: judge/models/contest.py:757
 msgid "partial"
 msgstr "thành phần"
 
-#: judge/models/contest.py:750 judge/models/contest.py:803
+#: judge/models/contest.py:758 judge/models/contest.py:811
 msgid "is pretested"
 msgstr "dùng pretest"
 
-#: judge/models/contest.py:751 judge/models/interface.py:43
+#: judge/models/contest.py:759 judge/models/interface.py:43
 msgid "order"
 msgstr "thứ tự"
 
-#: judge/models/contest.py:753
+#: judge/models/contest.py:761
 msgid "0 to not show testcases, 1 to show"
 msgstr "0 để ẩn test, 1 để hiện"
 
-#: judge/models/contest.py:754
+#: judge/models/contest.py:762
 msgid "visible testcases"
 msgstr "hiển thị test"
 
-#: judge/models/contest.py:761
+#: judge/models/contest.py:769
 msgid "Maximum number of submissions for this problem, or 0 for no limit."
 msgstr "Số lần nộp tối đa, đặt là 0 nếu không có giới hạn."
 
-#: judge/models/contest.py:763
+#: judge/models/contest.py:771
 msgid "max submissions"
 msgstr "số lần nộp tối đa"
 
-#: judge/models/contest.py:766
+#: judge/models/contest.py:774
 msgid "Why include a problem you can't submit to?"
 msgstr ""
 
-#: judge/models/contest.py:776
+#: judge/models/contest.py:784
 msgid "contest problem"
 msgstr "bài trong kỳ thi"
 
-#: judge/models/contest.py:777
+#: judge/models/contest.py:785
 msgid "contest problems"
 msgstr "bài trong kỳ thi"
 
-#: judge/models/contest.py:783 judge/models/submission.py:233
+#: judge/models/contest.py:791 judge/models/submission.py:233
 msgid "submission"
 msgstr "bài nộp"
 
-#: judge/models/contest.py:796 judge/models/contest.py:822
+#: judge/models/contest.py:804 judge/models/contest.py:830
 msgid "participation"
 msgstr "lần tham gia"
 
-#: judge/models/contest.py:804
+#: judge/models/contest.py:812
 msgid "Whether this submission was ran only on pretests."
 msgstr "Quyết định bài nộp chỉ được chạy trên pretest không."
 
-#: judge/models/contest.py:809
+#: judge/models/contest.py:817
 msgid "contest submission"
 msgstr "bài nộp kỳ thi"
 
-#: judge/models/contest.py:810
+#: judge/models/contest.py:818
 msgid "contest submissions"
 msgstr "bài nộp kỳ thi"
 
-#: judge/models/contest.py:826
+#: judge/models/contest.py:834
 msgid "rank"
 msgstr "rank"
 
-#: judge/models/contest.py:827
+#: judge/models/contest.py:835
 msgid "rating"
 msgstr "rating"
 
-#: judge/models/contest.py:828
+#: judge/models/contest.py:836
 msgid "raw rating"
 msgstr "rating thật"
 
-#: judge/models/contest.py:829
+#: judge/models/contest.py:837
 msgid "contest performance"
 msgstr ""
 
-#: judge/models/contest.py:830
+#: judge/models/contest.py:838
 msgid "last rated"
 msgstr "lần cuối được xếp hạng"
 
-#: judge/models/contest.py:834
+#: judge/models/contest.py:842
 msgid "contest rating"
 msgstr "rating kỳ thi"
 
-#: judge/models/contest.py:835
+#: judge/models/contest.py:843
 msgid "contest ratings"
 msgstr "rating kỳ thi"
 
-#: judge/models/contest.py:859
+#: judge/models/contest.py:867
 msgid "contest moss result"
 msgstr "kết quả MOSS kỳ thi"
 
-#: judge/models/contest.py:860
+#: judge/models/contest.py:868
 msgid "contest moss results"
 msgstr "kết quả MOSS kỳ thi"
 
-#: judge/models/contest.py:865
+#: judge/models/contest.py:873
 msgid "clarified problem"
 msgstr ""
 
-#: judge/models/contest.py:867
+#: judge/models/contest.py:875
 msgid "clarification body"
 msgstr ""
 
-#: judge/models/contest.py:869
+#: judge/models/contest.py:877
 msgid "clarification timestamp"
 msgstr ""
 
@@ -2554,7 +2566,7 @@ msgid "Editing comment"
 msgstr "Chỉnh sửa bình luận"
 
 #: judge/views/contests.py:119 judge/views/contests.py:367
-#: judge/views/contests.py:372 judge/views/contests.py:613
+#: judge/views/contests.py:372 judge/views/contests.py:619
 msgid "No such contest"
 msgstr "Không có contest nào như vậy"
 
@@ -2578,113 +2590,113 @@ msgstr "Không tìm thấy kỳ thi nào như vậy."
 msgid "Access to contest \"%s\" denied"
 msgstr "Truy cập tới kỳ thi \"%s\" bị từ chối"
 
-#: judge/views/contests.py:418
+#: judge/views/contests.py:424
 msgid "Clone Contest"
 msgstr "Nhân bản kỳ thi"
 
-#: judge/views/contests.py:487
+#: judge/views/contests.py:493
 msgid "Contest not ongoing"
 msgstr "Kỳ thi đang không diễn ra"
 
-#: judge/views/contests.py:488
+#: judge/views/contests.py:494
 #, python-format
 msgid "\"%s\" is not currently ongoing."
 msgstr "\"%s\" kỳ thi đang không diễn ra."
 
-#: judge/views/contests.py:495
+#: judge/views/contests.py:501
 msgid "Already in contest"
 msgstr "Đã ở trong kỳ thi"
 
-#: judge/views/contests.py:496
+#: judge/views/contests.py:502
 #, python-format
 msgid "You are already in a contest: \"%s\"."
 msgstr "Bạn đã ở trong kỳ thi: \"%s\"."
 
-#: judge/views/contests.py:506
+#: judge/views/contests.py:512
 msgid "Banned from joining"
 msgstr "Bị cấm tham gia"
 
-#: judge/views/contests.py:508
+#: judge/views/contests.py:514
 msgid ""
 "You have been declared persona non grata for this contest. You are "
 "permanently barred from joining this contest."
 msgstr "Bạn không được phép tham gia kỳ thi này."
 
-#: judge/views/contests.py:597
+#: judge/views/contests.py:603
 #, python-format
 msgid "Enter access code for \"%s\""
 msgstr "Nhập mật khẩu truy cập cho \"%s\""
 
-#: judge/views/contests.py:614
+#: judge/views/contests.py:620
 #, python-format
 msgid "You are not in contest \"%s\"."
 msgstr "Bạn không ở trong kỳ thi \"%s\"."
 
-#: judge/views/contests.py:637
+#: judge/views/contests.py:643
 msgid "ContestCalendar requires integer year and month"
 msgstr "Lịch thi yêu cầu giá trị cho năm và tháng là số nguyên"
 
-#: judge/views/contests.py:695
+#: judge/views/contests.py:701
 #, python-format
 msgid "Contests in %(month)s"
 msgstr "Các kỳ thi trong %(month)s"
 
-#: judge/views/contests.py:696
+#: judge/views/contests.py:702
 msgid "F Y"
 msgstr "F Y"
 
-#: judge/views/contests.py:756
+#: judge/views/contests.py:762
 #, python-format
 msgid "%s Statistics"
 msgstr "%s Thống kê"
 
-#: judge/views/contests.py:1013
+#: judge/views/contests.py:1019
 #, python-format
 msgid "%s Rankings"
 msgstr "%s Bảng điểm"
 
-#: judge/views/contests.py:1024
+#: judge/views/contests.py:1030
 msgid "???"
 msgstr "???"
 
-#: judge/views/contests.py:1040
+#: judge/views/contests.py:1046
 #, python-format
 msgid "Your participation in %s"
 msgstr "Lần tham gia trong %s"
 
-#: judge/views/contests.py:1041
+#: judge/views/contests.py:1047
 #, python-format
 msgid "%s's participation in %s"
 msgstr "Lần tham gia của %s trong %s"
 
-#: judge/views/contests.py:1055
+#: judge/views/contests.py:1061
 msgid "Live"
 msgstr "Trực tiếp"
 
-#: judge/views/contests.py:1074 templates/contest/contest-tabs.html:13
+#: judge/views/contests.py:1080 templates/contest/contest-tabs.html:13
 msgid "Participation"
 msgstr "Lần tham gia"
 
-#: judge/views/contests.py:1123
+#: judge/views/contests.py:1129
 #, python-format
 msgid "%s MOSS Results"
 msgstr "%s Kết quả MOSS"
 
-#: judge/views/contests.py:1159
+#: judge/views/contests.py:1165
 #, python-format
 msgid "Running MOSS for %s..."
 msgstr "Đang chạy MOSS cho %s..."
 
-#: judge/views/contests.py:1182
+#: judge/views/contests.py:1188
 #, python-format
 msgid "Contest tag: %s"
 msgstr "Nhãn kỳ thi: %s"
 
-#: judge/views/contests.py:1197 judge/views/ticket.py:72
+#: judge/views/contests.py:1203 judge/views/ticket.py:72
 msgid "Issue description"
 msgstr "Mô tả vấn đề"
 
-#: judge/views/contests.py:1244
+#: judge/views/contests.py:1250
 #, python-format
 msgid "New clarification for %s"
 msgstr "Thông báo mới cho %s"
@@ -2930,41 +2942,41 @@ msgstr "Hướng dẫn cho {0}"
 msgid "Editorial for <a href=\"{1}\">{0}</a>"
 msgstr "Hướng dẫn cho <a href=\"{1}\">{0}</a>"
 
-#: judge/views/problem.py:443 templates/contest/contest.html:81
+#: judge/views/problem.py:447 templates/contest/contest.html:81
 #: templates/organization/org-left-sidebar.html:4
 #: templates/user/user-about.html:28 templates/user/user-bookmarks.html:32
 #: templates/user/user-tabs.html:5 templates/user/users-table.html:19
 msgid "Problems"
 msgstr "Bài tập"
 
-#: judge/views/problem.py:823
+#: judge/views/problem.py:827
 msgid "Problem feed"
 msgstr "Bài tập"
 
-#: judge/views/problem.py:1061
+#: judge/views/problem.py:1065
 msgid "Banned from submitting"
 msgstr "Bị cấm nộp bài"
 
-#: judge/views/problem.py:1063
+#: judge/views/problem.py:1067
 msgid ""
 "You have been declared persona non grata for this problem. You are "
 "permanently barred from submitting this problem."
 msgstr "Bạn đã bị cấm nộp bài này."
 
-#: judge/views/problem.py:1086
+#: judge/views/problem.py:1090
 msgid "Too many submissions"
 msgstr "Quá nhiều lần nộp"
 
-#: judge/views/problem.py:1088
+#: judge/views/problem.py:1092
 msgid "You have exceeded the submission limit for this problem."
 msgstr "Bạn đã vượt quá số lần nộp cho bài này."
 
-#: judge/views/problem.py:1167 judge/views/problem.py:1172
+#: judge/views/problem.py:1171 judge/views/problem.py:1176
 #, python-format
 msgid "Submit to %(problem)s"
 msgstr "Nộp bài cho %(problem)s"
 
-#: judge/views/problem.py:1195
+#: judge/views/problem.py:1199
 msgid "Clone Problem"
 msgstr "Nhân bản bài tập"
 
@@ -3138,39 +3150,39 @@ msgstr "Bài nộp của %(user)s cho bài %(problem)s"
 msgid "All submissions"
 msgstr "Tất cả bài nộp"
 
-#: judge/views/submission.py:495
+#: judge/views/submission.py:505
 msgid "All my submissions"
 msgstr "Tất cả bài nộp của tôi"
 
-#: judge/views/submission.py:496
+#: judge/views/submission.py:506
 #, python-format
 msgid "All submissions by %s"
 msgstr "Tất cả bài nộp của %s"
 
-#: judge/views/submission.py:541
+#: judge/views/submission.py:551
 #, python-format
 msgid "All submissions for %s"
 msgstr "Tất cả bài nộp cho %s"
 
-#: judge/views/submission.py:569
+#: judge/views/submission.py:579
 msgid "Must pass a problem"
 msgstr "Phải làm được một bài"
 
-#: judge/views/submission.py:627
+#: judge/views/submission.py:637
 #, python-format
 msgid "My submissions for %(problem)s"
 msgstr "Bài nộp của tôi cho %(problem)s"
 
-#: judge/views/submission.py:628
+#: judge/views/submission.py:638
 #, python-format
 msgid "%(user)s's submissions for %(problem)s"
 msgstr "Các bài nộp của %(user)s cho %(problem)s"
 
-#: judge/views/submission.py:758
+#: judge/views/submission.py:768
 msgid "Must pass a contest"
 msgstr "Phải qua một kỳ thi"
 
-#: judge/views/submission.py:788
+#: judge/views/submission.py:798
 #, python-brace-format
 msgid ""
 "<a href=\"{1}\">{0}</a>'s submissions for <a href=\"{3}\">{2}</a> in <a href="
@@ -3179,7 +3191,7 @@ msgstr ""
 "Các bài nộp của <a href=\"{1}\">{0}</a> cho <a href=\"{3}\">{2}</a> trong <a "
 "href=\"{5}\">{4}</a>"
 
-#: judge/views/submission.py:800
+#: judge/views/submission.py:810
 #, python-brace-format
 msgid ""
 "<a href=\"{1}\">{0}</a>'s submissions for problem {2} in <a href=\"{4}\">{3}"
@@ -3188,7 +3200,7 @@ msgstr ""
 "Các bài nộp của <a href=\"{1}\">{0}</a> cho bài {2} trong <a href=\"{4}\">{3}"
 "</a>"
 
-#: judge/views/submission.py:851
+#: judge/views/submission.py:861
 #, fuzzy
 #| msgid "You do not have the permission to rejudge submissions."
 msgid "You don't have permission to access."
@@ -3248,48 +3260,48 @@ msgstr "Hủy kích hoạt Two Factor Authentication"
 msgid "Perform Two Factor Authentication"
 msgstr "Thực hiện Two Factor Authentication"
 
-#: judge/views/user.py:90
+#: judge/views/user.py:97
 msgid "No such user"
 msgstr "Không người dùng nào như vậy"
 
-#: judge/views/user.py:91
+#: judge/views/user.py:98
 #, python-format
 msgid "No user handle \"%s\"."
 msgstr "Không tồn tại tên người dùng \"%s\"."
 
-#: judge/views/user.py:96
+#: judge/views/user.py:103
 msgid "My account"
 msgstr "Tài khoản của tôi"
 
-#: judge/views/user.py:98
+#: judge/views/user.py:105
 #, python-format
 msgid "User %s"
 msgstr "Thành viên %s"
 
-#: judge/views/user.py:196
+#: judge/views/user.py:203
 msgid "M j, Y"
 msgstr "j M, Y"
 
-#: judge/views/user.py:231
+#: judge/views/user.py:238
 msgid "M j, Y, G:i"
 msgstr "j M, Y, G:i"
 
-#: judge/views/user.py:409
+#: judge/views/user.py:417
 msgid "Updated on site"
 msgstr "Được cập nhật trên web"
 
-#: judge/views/user.py:464 templates/admin/auth/user/change_form.html:14
+#: judge/views/user.py:472 templates/admin/auth/user/change_form.html:14
 #: templates/admin/auth/user/change_form.html:17 templates/base.html:280
 #: templates/user/user-tabs.html:11
 msgid "Edit profile"
 msgstr "Chỉnh sửa thông tin"
 
-#: judge/views/user.py:475 templates/user/user-left-sidebar.html:2
+#: judge/views/user.py:483 templates/user/user-left-sidebar.html:2
 #: templates/user/user-list-tabs.html:4
 msgid "Leaderboard"
 msgstr "Xếp hạng"
 
-#: judge/views/user.py:574
+#: judge/views/user.py:582
 msgid "Import Users"
 msgstr ""
 
diff --git a/templates/contest/ranking-css.html b/templates/contest/ranking-css.html
index 43215f0..54fd018 100644
--- a/templates/contest/ranking-css.html
+++ b/templates/contest/ranking-css.html
@@ -35,6 +35,10 @@
         background: #00f9a1;
     }
 
+    .frozen {
+        background: #a5c5d9 !important;
+    }
+
     .rank {
         min-width: 2.5em
     }