diff --git a/models/contest.js b/models/contest.js
index 9365f70..47e5b92 100644
--- a/models/contest.js
+++ b/models/contest.js
@@ -46,6 +46,7 @@ let model = db.define('contest', {
 
   information: { type: Sequelize.TEXT },
   problems: { type: Sequelize.TEXT },
+  admins: { type: Sequelize.TEXT },
 
   ranklist_id: {
     type: Sequelize.INTEGER,
@@ -57,17 +58,17 @@ let model = db.define('contest', {
 
   is_public: { type: Sequelize.BOOLEAN }
 }, {
-  timestamps: false,
-  tableName: 'contest',
-  indexes: [
-    {
-      fields: ['holder_id'],
-    },
-    {
-      fields: ['ranklist_id'],
-    }
-  ]
-});
+    timestamps: false,
+    tableName: 'contest',
+    indexes: [
+      {
+        fields: ['holder_id'],
+      },
+      {
+        fields: ['ranklist_id'],
+      }
+    ]
+  });
 
 let Model = require('./common');
 class Contest extends Model {
@@ -76,6 +77,7 @@ class Contest extends Model {
       title: '',
       subtitle: '',
       problems: '',
+      admins: '',
       information: '',
       type: 'noi',
       start_time: 0,
@@ -92,7 +94,7 @@ class Contest extends Model {
   }
 
   async isSupervisior(user) {
-    return user && (user.is_admin || this.holder_id === user.id);
+    return user && (user.is_admin || this.holder_id === user.id || this.admins.split('|').includes(user.id.toString()));
   }
 
   allowedSeeingOthers() {
diff --git a/modules/api_v2.js b/modules/api_v2.js
index f79d5af..3dd25de 100644
--- a/modules/api_v2.js
+++ b/modules/api_v2.js
@@ -19,6 +19,37 @@
 
 'use strict';
 
+app.get('/api/v2/search/users/:keyword*?', async (req, res) => {
+  try {
+    let User = syzoj.model('user');
+
+    let keyword = req.params.keyword || '';
+    let conditions = [];
+    const uid = parseInt(keyword);
+    if (uid != null && !isNaN(uid)) {
+      conditions.push({ id: uid });
+    }
+    if (keyword != null && String(keyword).length >= 2) {
+      conditions.push({ username: { like: `%${req.params.keyword}%` } });
+    }
+    if (conditions.length === 0) {
+      res.send({ success: true, results: [] });
+    } else {
+      let users = await User.query(null, {
+        $or: conditions
+      }, [['username', 'asc']]);
+
+      let result = [];
+
+      result = users.map(x => ({ name: `${x.username}`, value: x.id, url: syzoj.utils.makeUrl(['user', x.id]) }));
+      res.send({ success: true, results: result });
+    }
+  } catch (e) {
+    syzoj.log(e);
+    res.send({ success: false });
+  }
+});
+
 app.get('/api/v2/search/problems/:keyword*?', async (req, res) => {
   try {
     let Problem = syzoj.model('problem');
diff --git a/modules/contest.js b/modules/contest.js
index 0a210f1..3951b43 100644
--- a/modules/contest.js
+++ b/modules/contest.js
@@ -63,12 +63,14 @@ app.get('/contest/:id/edit', async (req, res) => {
       contest.id = 0;
     }
 
-    let problems = [];
+    let problems = [], admins = [];
     if (contest.problems) problems = await contest.problems.split('|').mapAsync(async id => await Problem.fromID(id));
+    if (contest.admins) admins = await contest.admins.split('|').mapAsync(async id => await User.fromID(id));
 
     res.render('contest_edit', {
       contest: contest,
-      problems: problems
+      problems: problems,
+      admins: admins
     });
   } catch (e) {
     syzoj.log(e);
@@ -103,6 +105,7 @@ app.post('/contest/:id/edit', async (req, res) => {
     contest.subtitle = req.body.subtitle;
     if (!Array.isArray(req.body.problems)) req.body.problems = [req.body.problems];
     contest.problems = req.body.problems.join('|');
+    contest.admins = req.body.admins.join('|');
     contest.information = req.body.information;
     contest.start_time = syzoj.utils.parseDate(req.body.start_time);
     contest.end_time = syzoj.utils.parseDate(req.body.end_time);
@@ -223,9 +226,13 @@ app.get('/contest/:id/ranklist', async (req, res) => {
   try {
     let contest_id = parseInt(req.params.id);
     let contest = await Contest.fromID(contest_id);
+    const curUser = res.locals.user;
 
     if (!contest) throw new ErrorMessage('无此比赛。');
-    if (!await contest.isAllowedSeeResultBy(res.locals.user)) throw new ErrorMessage('您没有权限进行此操作。');
+    if ([contest.allowedSeeingResult() && contest.allowedSeeingOthers(),
+    contest.isEnded(),
+    contest.isSupervisior(curUser)].every(x => !x))
+      throw new ErrorMessage('您没有权限进行此操作。');
 
     await contest.loadRelationships();
 
diff --git a/views/contest.ejs b/views/contest.ejs
index feaedc6..20176df 100644
--- a/views/contest.ejs
+++ b/views/contest.ejs
@@ -71,7 +71,7 @@
               <tr>
                 <td class="center aligned" style="white-space: nowrap; ">
                 <% if (problem.judge_id) { %>
-                  <a href="<%= syzoj.utils.makeUrl(['submission', problem.judge_id]) %>">
+                  <a href="<%= syzoj.utils.makeUrl(['contest', 'submission', problem.judge_id]) %>">
                   <% if (typeof problem.status === 'string') { %>
                     <span class="status <%= problem.status.toLowerCase().split(' ').join('_') %>">
                       <i class="<%= icon[getStatusMeta(problem.status)] || 'remove' %> icon"></i>
diff --git a/views/contest_edit.ejs b/views/contest_edit.ejs
index e1cd562..31b4ed9 100644
--- a/views/contest_edit.ejs
+++ b/views/contest_edit.ejs
@@ -18,6 +18,14 @@
                 <% } %>
                 </select>
             </div>
+            <div class="field">
+                <label>比赛管理员</label>
+                <select class="ui fluid search dropdown" multiple="" id="search_admins" name="admins">
+                <% for (let admin of admins) { %>
+                <option value="<%= admin.id %>" selected><%= admin.username %></option>
+                <% } %>
+                </select>
+            </div>
             <div class="inline fields">
               <label>赛制</label>
               <div class="field">
@@ -62,6 +70,21 @@
         </form>
 <script>
 $(function () {
+  $('#search_admins')
+    .dropdown({
+      debug: true,
+      apiSettings: {
+        url: '/api/v2/search/users/{query}',
+        onResponse: function (response) {
+          var a = $('#search_admins').val().map(function (x) { return parseInt(x) });
+          if (response.results) {
+            response.results = response.results.filter(x => !a.includes(parseInt(x.value)));
+          }
+          return response;
+        },
+        cache: false
+      }
+    });
   $('#search_problems')
     .dropdown({
       debug: true,