diff --git a/dmoj/urls.py b/dmoj/urls.py
index d2c2c12..6292098 100644
--- a/dmoj/urls.py
+++ b/dmoj/urls.py
@@ -1099,7 +1099,7 @@ urlpatterns = [
             ]
         ),
     ),
-    url(r"^resolver/(?P<contest>\w+)",resolver.Resolver.as_view(), name="resolver")
+    url(r"^resolver/(?P<contest>\w+)", resolver.Resolver.as_view(), name="resolver"),
 ] + url_static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
 
 # if hasattr(settings, "INTERNAL_IPS"):
diff --git a/judge/admin/contest.py b/judge/admin/contest.py
index 3a57793..a7441b0 100644
--- a/judge/admin/contest.py
+++ b/judge/admin/contest.py
@@ -3,7 +3,7 @@ from django.contrib import admin
 from django.core.exceptions import PermissionDenied
 from django.db import connection, transaction
 from django.db.models import Q, TextField
-from django.forms import ModelForm, ModelMultipleChoiceField
+from django.forms import ModelForm, ModelMultipleChoiceField, TextInput
 from django.http import Http404, HttpResponseRedirect
 from django.shortcuts import get_object_or_404
 from django.urls import reverse, reverse_lazy
@@ -66,7 +66,13 @@ class ContestTagAdmin(admin.ModelAdmin):
 
 class ContestProblemInlineForm(ModelForm):
     class Meta:
-        widgets = {"problem": AdminHeavySelect2Widget(data_view="problem_select2")}
+        widgets = {
+            "problem": AdminHeavySelect2Widget(data_view="problem_select2"),
+            "frozen_subtasks": TextInput(attrs={"size": "3"}),
+            "points": TextInput(attrs={"size": "1"}),
+            "order": TextInput(attrs={"size": "1"}),
+            "output_prefix_override": TextInput(attrs={"size": "1"}),
+        }
 
 
 class ContestProblemInline(admin.TabularInline):
@@ -79,6 +85,7 @@ class ContestProblemInline(admin.TabularInline):
         "partial",
         "is_pretested",
         "max_submissions",
+        "frozen_subtasks",
         "output_prefix_override",
         "order",
         "rejudge_column",
diff --git a/judge/caching.py b/judge/caching.py
index b45e910..99bbf81 100644
--- a/judge/caching.py
+++ b/judge/caching.py
@@ -8,4 +8,3 @@ def finished_submission(sub):
         keys += ["contest_complete:%d" % participation.id]
         keys += ["contest_attempted:%d" % participation.id]
     cache.delete_many(keys)
-
diff --git a/judge/contest_format/base.py b/judge/contest_format/base.py
index 848d81d..05c6391 100644
--- a/judge/contest_format/base.py
+++ b/judge/contest_format/base.py
@@ -98,15 +98,22 @@ class BaseContestFormat(metaclass=ABCMeta):
         return "partial-score"
 
     def handle_frozen_state(self, participation, format_data):
-        if not self.contest.freeze_after:
-            return
+        frozen_subtasks = {}
+        if hasattr(self, "get_frozen_subtasks"):
+            frozen_subtasks = self.get_frozen_subtasks()
+
         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:
+                is_after_freeze = (
+                    self.contest.freeze_after
+                    and result["time"]
+                    >= self.contest.freeze_after + participation.start
+                )
+                if is_after_freeze or frozen_subtasks.get(problem):
                     format_data[problem]["frozen"] = True
             else:
                 format_data[problem] = {"time": 0, "points": 0, "frozen": True}
diff --git a/judge/contest_format/ioi.py b/judge/contest_format/ioi.py
index 2f51eb7..5c2502c 100644
--- a/judge/contest_format/ioi.py
+++ b/judge/contest_format/ioi.py
@@ -111,7 +111,9 @@ class IOIContestFormat(DefaultContestFormat):
                         contest_problem.problem.code,
                     ],
                 ),
-                points=floatformat(format_data["points"]),
+                points=floatformat(
+                    format_data["points"], -self.contest.points_precision
+                ),
                 time=nice_repr(timedelta(seconds=format_data["time"]), "noday")
                 if self.config["cumtime"]
                 else "",
@@ -122,7 +124,7 @@ class IOIContestFormat(DefaultContestFormat):
     def display_participation_result(self, participation):
         return format_html(
             '<td class="user-points">{points}<div class="solving-time">{cumtime}</div></td>',
-            points=floatformat(participation.score),
+            points=floatformat(participation.score, -self.contest.points_precision),
             cumtime=nice_repr(timedelta(seconds=participation.cumtime), "noday")
             if self.config["cumtime"]
             else "",
diff --git a/judge/contest_format/new_ioi.py b/judge/contest_format/new_ioi.py
index 848ea7f..9571c34 100644
--- a/judge/contest_format/new_ioi.py
+++ b/judge/contest_format/new_ioi.py
@@ -14,6 +14,21 @@ class NewIOIContestFormat(IOIContestFormat):
         cumtime: Specify True if time penalties are to be computed. Defaults to False.
     """
 
+    def get_frozen_subtasks(self):
+        queryset = self.contest.contest_problems.values_list("id", "frozen_subtasks")
+        res = {}
+        for problem_id, frozen_subtasks in queryset:
+            subtasks = set()
+            if frozen_subtasks:
+                frozen_subtasks = frozen_subtasks.split(",")
+                for i in frozen_subtasks:
+                    try:
+                        subtasks.add(int(i))
+                    except Exception as e:
+                        pass
+            res[str(problem_id)] = subtasks
+        return res
+
     def get_results_by_subtask(self, participation, include_frozen=False):
         frozen_time = self.contest.end_time
         if self.contest.freeze_after and not include_frozen:
@@ -65,6 +80,7 @@ class NewIOIContestFormat(IOIContestFormat):
                                   ON (sub.id = cs.submission_id AND sub.status = 'D')
                                       INNER JOIN judge_submissiontestcase tc
                                   ON sub.id = tc.submission_id
+                             WHERE sub.date < %s
                              GROUP BY cp.id, tc.batch, sub.id
                          ) r
                     GROUP BY prob, batch
@@ -73,7 +89,12 @@ class NewIOIContestFormat(IOIContestFormat):
                 WHERE p.max_batch_points = q.batch_points
                 GROUP BY q.prob, q.batch
             """,
-                (participation.id, to_database_time(frozen_time), participation.id),
+                (
+                    participation.id,
+                    to_database_time(frozen_time),
+                    participation.id,
+                    to_database_time(frozen_time),
+                ),
             )
 
             return cursor.fetchall()
@@ -82,6 +103,7 @@ class NewIOIContestFormat(IOIContestFormat):
         cumtime = 0
         score = 0
         format_data = {}
+        frozen_subtasks = self.get_frozen_subtasks()
 
         for (
             problem_id,
@@ -101,10 +123,11 @@ class NewIOIContestFormat(IOIContestFormat):
 
             if format_data.get(problem_id) is None:
                 format_data[problem_id] = {"points": 0, "time": 0, "total_points": 0}
-            format_data[problem_id]["points"] += subtask_points
+            if subtask not in frozen_subtasks.get(problem_id, set()):
+                format_data[problem_id]["points"] += subtask_points
+            format_data[problem_id]["total_points"] += total_subtask_points
             format_data[problem_id]["time"] = max(dt, format_data[problem_id]["time"])
             format_data[problem_id]["problem_points"] = problem_points
-            format_data[problem_id]["total_points"] += total_subtask_points
 
         for problem_data in format_data.values():
             if not problem_data["total_points"]:
diff --git a/judge/middleware.py b/judge/middleware.py
index 3b2fe9f..940b486 100644
--- a/judge/middleware.py
+++ b/judge/middleware.py
@@ -81,4 +81,4 @@ class DarkModeMiddleware(object):
             return HttpResponseRedirect(
                 reverse("toggle_darkmode") + "?next=" + urlquote(request.path)
             )
-        return self.get_response(request)
\ No newline at end of file
+        return self.get_response(request)
diff --git a/judge/migrations/0141_contestproblem_frozen_subtasks.py b/judge/migrations/0141_contestproblem_frozen_subtasks.py
new file mode 100644
index 0000000..c85dc49
--- /dev/null
+++ b/judge/migrations/0141_contestproblem_frozen_subtasks.py
@@ -0,0 +1,24 @@
+# Generated by Django 3.2.16 on 2022-12-20 06:15
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("judge", "0140_alter_contest_format_name"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="contestproblem",
+            name="frozen_subtasks",
+            field=models.CharField(
+                blank=True,
+                help_text="Only for format new IOI. Separated by commas, e.g: 2, 3",
+                max_length=20,
+                null=True,
+                verbose_name="frozen subtasks",
+            ),
+        ),
+    ]
diff --git a/judge/models/contest.py b/judge/models/contest.py
index 0a7389b..18f4c71 100644
--- a/judge/models/contest.py
+++ b/judge/models/contest.py
@@ -774,6 +774,13 @@ class ContestProblem(models.Model):
             MinValueValidator(0, _("Why include a problem you " "can't submit to?"))
         ],
     )
+    frozen_subtasks = models.CharField(
+        help_text=_("Only for format new IOI. Separated by commas, e.g: 2, 3"),
+        verbose_name=_("frozen subtasks"),
+        null=True,
+        blank=True,
+        max_length=20,
+    )
 
     @property
     def clarifications(self):
diff --git a/judge/views/resolver.py b/judge/views/resolver.py
index cdbe4af..db0c140 100644
--- a/judge/views/resolver.py
+++ b/judge/views/resolver.py
@@ -2,6 +2,7 @@ from django.views.generic import TemplateView
 from django.utils.translation import gettext as _
 from django.http import HttpResponseForbidden
 
+
 class Resolver(TemplateView):
     title = _("Resolver")
     template_name = "resolver/resolver.html"
@@ -15,5 +16,3 @@ class Resolver(TemplateView):
         if request.user.is_superuser:
             return super(Resolver, self).get(request, *args, **kwargs)
         return HttpResponseForbidden()
-
-    
\ No newline at end of file
diff --git a/judge/views/submission.py b/judge/views/submission.py
index d783c9b..83c4216 100644
--- a/judge/views/submission.py
+++ b/judge/views/submission.py
@@ -842,6 +842,7 @@ class UserContestSubmissionsAjax(UserContestSubmissions):
             total_points = 0
             problem_points = 0
             achieved_points = 0
+            frozen_subtasks = self.contest.format.get_frozen_subtasks()
 
             for (
                 problem_id,
@@ -860,25 +861,38 @@ class UserContestSubmissionsAjax(UserContestSubmissions):
                     subtask = 0
                 problem_points = pp
                 submission = Submission.objects.get(id=sub_id)
-                best_subtasks[subtask] = {
-                    "submission": submission,
-                    "contest_time": nice_repr(self.contest_time(submission), "noday"),
-                    "points": subtask_points,
-                    "total": total_subtask_points,
-                }
+                if subtask in frozen_subtasks.get(str(problem_id), set()):
+                    best_subtasks[subtask] = {
+                        "submission": submission,
+                        "contest_time": nice_repr(
+                            self.contest_time(submission), "noday"
+                        ),
+                        "points": "???",
+                        "total": total_subtask_points,
+                    }
+                else:
+                    best_subtasks[subtask] = {
+                        "submission": submission,
+                        "contest_time": nice_repr(
+                            self.contest_time(submission), "noday"
+                        ),
+                        "points": subtask_points,
+                        "total": total_subtask_points,
+                    }
+                    achieved_points += subtask_points
                 total_points += total_subtask_points
-                achieved_points += subtask_points
             for subtask in best_subtasks.values():
-                subtask["points"] = floatformat(
-                    subtask["points"] / total_points * problem_points,
-                    -self.contest.points_precision,
-                )
+                if subtask["points"] != "???":
+                    subtask["points"] = floatformat(
+                        subtask["points"] / total_points * problem_points,
+                        -self.contest.points_precision,
+                    )
                 subtask["total"] = floatformat(
                     subtask["total"] / total_points * problem_points,
                     -self.contest.points_precision,
                 )
-            achieved_points = achieved_points / total_points * problem_points
-            if best_subtasks:
+            if total_points > 0 and best_subtasks:
+                achieved_points = achieved_points / total_points * problem_points
                 return best_subtasks, achieved_points, problem_points
         return None
 
@@ -914,9 +928,10 @@ class UserContestSubmissionsAjax(UserContestSubmissions):
                 context["points"],
                 context["total"],
             ) = best_subtasks
-            context["points"] = floatformat(
-                context["points"], -self.contest.points_precision
-            )
+            if context["points"] != "???":
+                context["points"] = floatformat(
+                    context["points"], -self.contest.points_precision
+                )
             context["total"] = floatformat(
                 context["total"], -self.contest.points_precision
             )
diff --git a/judge/views/user.py b/judge/views/user.py
index b22a692..7cb98ec 100644
--- a/judge/views/user.py
+++ b/judge/views/user.py
@@ -630,4 +630,4 @@ def toggle_darkmode(request):
     if not path:
         return HttpResponseBadRequest()
     request.session["darkmode"] = not request.session.get("darkmode", False)
-    return HttpResponseRedirect(path)
\ No newline at end of file
+    return HttpResponseRedirect(path)
diff --git a/templates/submission/user-ajax.html b/templates/submission/user-ajax.html
index e16bb6c..bc237fb 100644
--- a/templates/submission/user-ajax.html
+++ b/templates/submission/user-ajax.html
@@ -10,7 +10,7 @@
             <td class="lightbox-submissions-time">
                 <b>{{_('Subtask')}} {{subtask}}:</b>
             </td>
-            <td class="lightbox-submissions-time case-{{'AC' if cur_subtask.points == cur_subtask.total else 'WA'}}">
+            <td class="lightbox-submissions-time case-{{'AC' if cur_subtask.points == cur_subtask.total else ('TLE' if cur_subtask.points == '???' else 'WA')}}">
                 {{ cur_subtask.points }} / {{ cur_subtask.total }}
             </td>
             <td>
@@ -28,7 +28,7 @@
         <td class="lightbox-submissions-time">
             <b>{{_('Total')}}:</b>
         </td>
-        <td style="border-top: 1px black solid" class="case-{{'AC' if points == total else 'WA'}}">
+        <td style="border-top: 1px solid" class="case-{{'AC' if points == total else 'WA'}}">
             {{ points }} / {{ total }}
         </td>
     </tr>