diff --git a/web/admin/problem_edit.php b/web/admin/problem_edit.php
index 6cd24a4..ac456a4 100644
--- a/web/admin/problem_edit.php
+++ b/web/admin/problem_edit.php
@@ -236,17 +236,20 @@ include_once("kindeditor.php") ;
       $description = $_POST['description'];
      // $description = str_replace("<p>", "", $description);
      // $description = str_replace("</p>", "<br />", $description);
-      $description = str_replace(",", "&#44;", $description);
+      // $description = str_replace(",", "&#44;", $description);
+      $description = html_entity_decode($description,ENT_QUOTES,"UTF-8");
 
       $input = $_POST['input'];
      // $input = str_replace("<p>", "", $input);
      // $input = str_replace("</p>", "<br />", $input);
-      $input = str_replace(",", "&#44;", $input);
+      // $input = str_replace(",", "&#44;", $input);
+      $input = html_entity_decode($input,ENT_QUOTES,"UTF-8");
 
       $output = $_POST['output'];
      // $output = str_replace("<p>", "", $output);
      // $output = str_replace("</p>", "<br />", $output);
-      $output = str_replace(",", "&#44;", $output);
+      // $output = str_replace(",", "&#44;", $output);
+      $output = html_entity_decode($output,ENT_QUOTES,"UTF-8");
 
       $sample_input = $_POST['sample_input'];
       $sample_output = $_POST['sample_output'];
@@ -256,7 +259,8 @@ include_once("kindeditor.php") ;
       $hint = $_POST['hint'];
      // $hint = str_replace("<p>", "", $hint);
     //  $hint = str_replace("</p>", "<br />", $hint);
-      $hint = str_replace(",", "&#44;", $hint);
+      // $hint = str_replace(",", "&#44;", $hint);
+      $hint = html_entity_decode($hint,ENT_QUOTES,"UTF-8");
 
       $source = $_POST['source'];
       $remote_oj= $_POST['remote_oj'];