diff --git a/views/problem.ejs b/views/problem.ejs
index 4ba8c26..2664ea9 100644
--- a/views/problem.ejs
+++ b/views/problem.ejs
@@ -24,7 +24,7 @@ if (contest) {
<% if (contest) { %>
<%= syzoj.utils.removeTitleTag(problem.title) %>
<% } else { %>
- <%= problem.title %><% if (problem.allowedEdit && !problem.is_public) { %>未公开<% } %>
+ #<%= problem.id %>. <%= problem.title %><% if (problem.allowedEdit && !problem.is_public) { %>未公开<% } %>
<% } %>