diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 824c03185..a3cb36199 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.3.12",
+    "version": "3.3.13",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index 4265ae984..f5c0ffa77 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -78,7 +78,7 @@ export class ContestDetailHandler extends Handler {
     @param('page', Types.PositiveInt, true)
     async prepare(domainId: string, tid: ObjectID) {
         const tdoc = await contest.get(domainId, tid);
-        if (tdoc.assign) {
+        if (tdoc.assign?.length) {
             const groups = await user.listGroup(domainId, this.user._id);
             if (!Set.intersection(tdoc.assign, groups.map((i) => i.name)).size) {
                 throw new ForbiddenError('You are not assigned.');
@@ -214,16 +214,6 @@ export class ContestEditHandler extends Handler {
         this.response.template = 'contest_edit.html';
         const rules = {};
         for (const i in contest.RULES) rules[i] = contest.RULES[i].TEXT;
-        const path = [
-            ['Hydro', 'homepage'],
-            ['contest_main', 'contest_main'],
-            ...tid
-                ? [
-                    [this.tdoc.title, 'contest_detail', { tid: this.tdoc.docId }, true],
-                    ['contest_edit', null],
-                ]
-                : [['contest_create', null]],
-        ];
         let ts = new Date().getTime();
         ts = ts - (ts % (15 * Time.minute)) + 15 * Time.minute;
         const dt = this.tdoc?.beginAt || new Date(ts);
@@ -231,7 +221,6 @@ export class ContestEditHandler extends Handler {
             rules,
             tdoc: this.tdoc,
             duration: tid ? (this.tdoc.endAt.getTime() - this.tdoc.beginAt.getTime()) / Time.hour : 2,
-            path,
             pids: tid ? this.tdoc.pids.join(',') : '',
             date_text: dt.format('%Y-%m-%d'),
             time_text: dt.format('%H:%M'),
@@ -250,7 +239,7 @@ export class ContestEditHandler extends Handler {
     @param('rated', Types.Boolean)
     @param('code', Types.String, true)
     @param('autoHide', Types.String, true)
-    @param('assign', Types.Array, true)
+    @param('assign', Types.CommaSeperatedArray, true)
     async post(
         domainId: string, tid: ObjectID, beginAtDate: string, beginAtTime: string, duration: number,
         title: string, content: string, rule: string, _pids: string, rated = false,
diff --git a/packages/hydrooj/src/handler/homework.ts b/packages/hydrooj/src/handler/homework.ts
index 7d92c7e3b..b45939069 100644
--- a/packages/hydrooj/src/handler/homework.ts
+++ b/packages/hydrooj/src/handler/homework.ts
@@ -45,7 +45,7 @@ class HomeworkDetailHandler extends Handler {
     async prepare(domainId: string, tid: ObjectID) {
         const tdoc = await contest.get(domainId, tid);
         if (tdoc.rule !== 'homework') throw new ContestNotFoundError(domainId, tid);
-        if (tdoc.assign) {
+        if (tdoc.assign?.length) {
             if (!Set.intersection(tdoc.assign, this.user.group).size) {
                 throw new ForbiddenError('You are not assigned.');
             }
@@ -151,10 +151,12 @@ class HomeworkEditHandler extends Handler {
     @param('content', Types.Content)
     @param('pids', Types.Content)
     @param('rated', Types.Boolean)
+    @param('assign', Types.CommaSeperatedArray, true)
     async post(
         domainId: string, tid: ObjectID, beginAtDate: string, beginAtTime: string,
         penaltySinceDate: string, penaltySinceTime: string, extensionDays: number,
         penaltyRules: PenaltyRules, title: string, content: string, _pids: string, rated = false,
+        assign: string[] = [],
     ) {
         const pids = _pids.replace(/，/g, ',').split(',').map((i) => +i).filter((i) => i);
         const tdoc = tid ? await contest.get(domainId, tid) : null;
@@ -172,10 +174,18 @@ class HomeworkEditHandler extends Handler {
         if (!tid) {
             tid = await contest.add(domainId, title, content, this.user._id,
                 'homework', beginAt.toDate(), endAt.toDate(), pids, rated,
-                { penaltySince: penaltySince.toDate(), penaltyRules });
+                { penaltySince: penaltySince.toDate(), penaltyRules, assign });
         } else {
             await contest.edit(domainId, tid, {
-                title, content, beginAt: beginAt.toDate(), endAt: endAt.toDate(), pids, penaltySince: penaltySince.toDate(), penaltyRules, rated,
+                title,
+                content,
+                beginAt: beginAt.toDate(),
+                endAt: endAt.toDate(),
+                pids,
+                penaltySince: penaltySince.toDate(),
+                penaltyRules,
+                rated,
+                assign,
             });
             if (tdoc.beginAt !== beginAt.toDate()
                 || tdoc.endAt !== endAt.toDate()
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 939adad3d..dad0e4f41 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.30.2",
+  "version": "4.30.3",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
diff --git a/packages/ui-default/templates/contest_edit.html b/packages/ui-default/templates/contest_edit.html
index c8ff83339..fcd542b21 100644
--- a/packages/ui-default/templates/contest_edit.html
+++ b/packages/ui-default/templates/contest_edit.html
@@ -42,7 +42,7 @@
           </div>
           <div class="row">
             {{ form.form_text({
-              columns:4,
+              columns:3,
               label:'Begin Date',
               name:'beginAtDate',
               placeholder:'YYYY-mm-dd',
@@ -51,7 +51,7 @@
               row:false
             }) }}
             {{ form.form_text({
-              columns:4,
+              columns:3,
               label:'Begin Time',
               name:'beginAtTime',
               placeholder:'HH:MM',
@@ -60,12 +60,19 @@
               row:false
             }) }}
             {{ form.form_text({
-              columns:4,
+              columns:2,
               label:'Duration (hours)',
               name:'duration',
               value:duration|default('3'),
               row:false
             }) }}
+            {{ form.form_text({
+              columns:4,
+              label:'Assign',
+              name:'assign',
+              value:tdoc.assign|default(''),
+              row:false
+            }) }}
           </div>
           <div class="row">
           {{ form.form_text({
diff --git a/packages/ui-default/templates/homework_edit.html b/packages/ui-default/templates/homework_edit.html
index 4cd99c0c2..e69d21c8b 100644
--- a/packages/ui-default/templates/homework_edit.html
+++ b/packages/ui-default/templates/homework_edit.html
@@ -54,16 +54,25 @@
                 row:false
             }) }}
           </div>
-          {{ form.form_text({
-              columns:4,
-              label:'Extension (days)',
-              name:'extensionDays',
-              value:extension_days
-          }) }}
+          <div class="row">
+            {{ form.form_text({
+                row:false,
+                columns:4,
+                label:'Extension (days)',
+                name:'extensionDays',
+                value:extension_days
+            }) }}
+            {{ form.form_text({
+                columns:4,
+                label:'Assign',
+                name:'assign',
+                value:tdoc.assign|default('')
+            }) }}
+          </div>
           <div class="row"><div class="columns">
             <label>
               {{ _('Extension Score Penalty') }}
-              <textarea name="penaltyRules" class="monospace textbox">{% if tdoc %}{{ penaltyRules }}{% else %}{% include 'partials/homework_default_penalty_rules.yaml' %}{% endif %}</textarea>
+              <textarea name="penaltyRules" class="monospace textbox" data-yaml>{% if tdoc %}{{ penaltyRules }}{% else %}{% include 'partials/homework_default_penalty_rules.yaml' %}{% endif %}</textarea>
             </label>
           </div></div>
           {{ form.form_text({