试试gemini的建议

web/template/syzoj/problem.php

@@ -511,19 +511,29 @@ if ($pr_flag) {
           headerIds: false
         });
 
+        // Helper function to decode HTML entities from Markdown source
+        function decodeHtmlEntities(text) {
+          var textArea = document.createElement('textarea');
+          textArea.innerHTML = text;
+          return textArea.value;
+        }
+
         $(".md").each(function () {
+          let raw_markdown_source = $(this).html();
+          let decoded_markdown_source = decodeHtmlEntities(raw_markdown_source);
+
           <?php if ( $OJ_MARKDOWN == "marked.js") { ?>
-            let markdown_content = marked.parse($(this).html());
+            let markdown_content = marked.parse(decoded_markdown_source);
           <?php } else if ($OJ_MARKDOWN == "markdown-it") { ?>
               const md = window.markdownit();
               md.set({
                 html: true,
                 linkify: true,
                 typographer: true,
-              })
-              let markdown_content = md.render($(this).html());
+              });
+              let markdown_content = md.render(decoded_markdown_source);
           <?php } ?>
-          $(this).html(markdown_content)
+          $(this).html(markdown_content);
         });
         // adding note for ```input1  ```output1 in description
         for (let i = 1; i < 10; i++) {