diff --git a/README.md b/README.md
index eafb630..6ae8f51 100644
--- a/README.md
+++ b/README.md
@@ -12,9 +12,9 @@ git clone https://github.com/syzoj/syzoj
 cd syzoj
 ```
 
-Install dependencies with `npm install` or `yarn`.
+Install dependencies with `npm install` or `yarn`. Also, follow the instructions [here](https://www.npmjs.com/package/node-7z#installation) to install `7z` executable used by the `node-7z` package.
 
-Copy the `config-example.json` file to `config.json`, and change the configures.
+Copy `config-example.json` to `config.json`, and make necessary changes.
 
 ## Database
 SYZOJ 2 uses [Sequelize](http://sequelizejs.com), which supports many database systems, including MySQL and Sqlite.
diff --git a/modules/submission.js b/modules/submission.js
index ad8943d..aa2e961 100644
--- a/modules/submission.js
+++ b/modules/submission.js
@@ -149,6 +149,7 @@ app.get('/submission/:id', async (req, res) => {
     judge.allowedRejudge = await judge.problem.isAllowedEditBy(res.locals.user);
     judge.allowedManage = await judge.problem.isAllowedManageBy(res.locals.user);
 
+    let hideScore = false;
     if (contest) {
       let problems_id = await contest.getProblems();
       judge.problem_id = problems_id.indexOf(judge.problem_id) + 1;
@@ -158,10 +159,13 @@ app.get('/submission/:id', async (req, res) => {
         if (!['Compile Error', 'Waiting', 'Compiling'].includes(judge.status)) {
           judge.status = 'Submitted';
         }
+
+        hideScore = true;
       }
     }
 
     res.render('submission', {
+      hideScore, hideScore,
       contest: contest,
       judge: judge
     });
@@ -197,6 +201,7 @@ app.get('/submission/:id/ajax', async (req, res) => {
     judge.allowedRejudge = await judge.problem.isAllowedEditBy(res.locals.user);
     judge.allowedManage = await judge.problem.isAllowedManageBy(res.locals.user);
 
+    let hideScore = false;
     if (contest) {
       let problems_id = await contest.getProblems();
       judge.problem_id = problems_id.indexOf(judge.problem_id) + 1;
@@ -206,10 +211,13 @@ app.get('/submission/:id/ajax', async (req, res) => {
         if (!['Compile Error', 'Waiting', 'Compiling'].includes(judge.status)) {
           judge.status = 'Submitted';
         }
+
+        hideScore = true;
       }
     }
 
     res.render('submission_content', {
+      hideScore, hideScore,
       contest: contest,
       judge: judge
     });
diff --git a/views/submission_content.ejs b/views/submission_content.ejs
index aad2c2d..3ca2274 100644
--- a/views/submission_content.ejs
+++ b/views/submission_content.ejs
@@ -36,12 +36,14 @@ else problemUrl = syzoj.utils.makeUrl(['problem', judge.problem_id]);
         <th>编号</th>
         <th>题目名称</th>
         <th>状态</th>
-        <% if ((typeof contest === 'undefined' || !contest) || !((!user || !user.is_admin) && !contest.ended && (contest.type === 'acm' || contest.type === 'noi'))) { %>
+        <% if ((typeof contest === 'undefined' || !contest) || !((!user || !user.is_admin) && !contest.ended && contest.type === 'acm') && !hideScore) { %>
           <th>分数</th>
         <% } %>
         <% if (judge.problem.type !== 'submit-answer') { %>
-          <th>总时间</th>
-          <th>内存</th>
+          <% if (!hideScore) { %>
+            <th>总时间</th>
+            <th>内存</th>
+          <% } %>
           <th>代码</th>
         <% } else { %>
           <th>文件大小</th>
@@ -58,12 +60,14 @@ else problemUrl = syzoj.utils.makeUrl(['problem', judge.problem_id]);
         <i class="<%= icon[getStatusMeta(judge.status)] || 'remove' %> icon"></i>
         <%= judge.status %>
         </td>
-        <% if ((typeof contest === 'undefined' || !contest) || !((!user || !user.is_admin) && !contest.ended && (contest.type === 'acm' || contest.type === 'noi'))) { %>
+        <% if ((typeof contest === 'undefined' || !contest) || !((!user || !user.is_admin) && !contest.ended && contest.type === 'acm') && !hideScore) { %>
           <td class="score score_<%= parseInt(judge.result.score / 10) || 0 %>"><%= judge.result.score %></td>
         <% } %>
         <% if (judge.problem.type !== 'submit-answer') { %>
-          <td><%= judge.result.total_time %> ms</td>
-          <td><%= parseInt(judge.result.max_memory) || 0 %> K</td>
+          <% if (!hideScore) { %>
+            <td><%= judge.result.total_time %> ms</td>
+            <td><%= parseInt(judge.result.max_memory) || 0 %> K</td>
+          <% } %>
           <% if (judge.allowedSeeCode) { %>
             <td><%= syzoj.config.languages[judge.language].show %> / <%= syzoj.utils.formatSize(judge.codeLength) %></td>
           <% } else { %>
diff --git a/views/submissions_item.ejs b/views/submissions_item.ejs
index 456d400..8de86f6 100644
--- a/views/submissions_item.ejs
+++ b/views/submissions_item.ejs
@@ -18,18 +18,18 @@ textFit(e, { maxFontSize: 14 });
 </a></td>
 <% if ((typeof contest === 'undefined' || !contest) || !((!user || !user.is_admin) && !contest.ended && (contest.type === 'acm' || contest.type === 'noi'))) { %>
   <td><a href="<%= syzoj.utils.makeUrl(['submission', judge.id]) %>"><span class="score score_<%= parseInt(judge.result.score / 10) || 0 %>"><%= judge.result.score %></span></a></td>
-<% } %>
-<% if (judge.problem.type !== 'submit-answer') { %>
-<td><%= judge.result.total_time %> ms</td>
-<td><%= parseInt(judge.result.max_memory) || 0 %> K</td>
-<% if (judge.allowedSeeCode) { %>
-  <td><a href="<%= syzoj.utils.makeUrl(['submission', judge.id]) %>"><%= syzoj.config.languages[judge.language].show %></a> / <%= syzoj.utils.formatSize(judge.code.length) %></td>
-<% } else { %>
-  <td><a href="<%= syzoj.utils.makeUrl(['submission', judge.id]) %>"><%= syzoj.config.languages[judge.language].show %></a> / 隐藏</td>
-<% } %>
-<% } else { %>
-<td>-</td><td>-</td>
-<td><%= syzoj.utils.formatSize(judge.max_memory) %></td>
+  <% if (judge.problem.type !== 'submit-answer') { %>
+    <td><%= judge.result.total_time %> ms</td>
+    <td><%= parseInt(judge.result.max_memory) || 0 %> K</td>
+    <% if (judge.allowedSeeCode) { %>
+      <td><a href="<%= syzoj.utils.makeUrl(['submission', judge.id]) %>"><%= syzoj.config.languages[judge.language].show %></a> / <%= syzoj.utils.formatSize(judge.code.length) %></td>
+    <% } else { %>
+      <td><a href="<%= syzoj.utils.makeUrl(['submission', judge.id]) %>"><%= syzoj.config.languages[judge.language].show %></a> / 隐藏</td>
+    <% } %>
+  <% } else { %>
+    <td>-</td><td>-</td>
+    <td><%= syzoj.utils.formatSize(judge.max_memory) %></td>
+  <% } %>
 <% } %>
 <td><a href="<%= syzoj.utils.makeUrl(['user', judge.user_id]) %>"><%= judge.user.username %></a><% if (judge.user.nameplate) { %><%- judge.user.nameplate %><% } %></td>
 <td><%= syzoj.utils.formatDate(judge.submit_time) %>