diff --git a/modules/problem.js b/modules/problem.js
index 05e0b38..fea51a9 100644
--- a/modules/problem.js
+++ b/modules/problem.js
@@ -465,7 +465,7 @@ app.post('/problem/:id/import', async (req, res) => {
     problem.file_io = json.obj.file_io;
     problem.file_io_input_name = json.obj.file_io_input_name;
     problem.file_io_output_name = json.obj.file_io_output_name;
-    if(json.obj.type) problem.type = json.obj.type;
+    if (json.obj.type) problem.type = json.obj.type;
 
     let validateMsg = await problem.validate();
     if (validateMsg) throw new ErrorMessage('无效的题目数据配置。', null, validateMsg);