fix: correct type conversion in leetcode-show-problem function

leetcode.el

@@ -215,6 +215,11 @@ Default is programming language.")
 c, cpp, csharp, golang, java, javascript, typescript, kotlin, php, python,
 python3, ruby, rust, scala, swift, mysql, mssql, oraclesql.")
 
+(defconst leetcode--code-start "// code_start"
+  "Code start mark in LeetCode description.")
+(defconst leetcode--code-end "// code_end"
+  "Code end mark in LeetCode description.")
+
 (defvar leetcode--filter-regex nil "Filter rows by regex.")
 (defvar leetcode--filter-tag nil "Filter rows by tag.")
 (defvar leetcode--filter-difficulty nil
@@ -370,6 +375,18 @@ query consolePanelConfig($titleSlug: String!) {
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Utils ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
+(defun leetcode--insert-code-start-marker ()
+  "Insert code start marker."
+  (when (or (string= leetcode--lang "c")
+            (string= leetcode--lang "cpp"))
+    (insert (format "\n\n%s\n\n" leetcode--code-start))))
+
+(defun leetcode--insert-code-end-marker ()
+  "Insert code end marker."
+  (when (or (string= leetcode--lang "c")
+            (string= leetcode--lang "cpp"))
+    (insert (format "\n\n%s\n\n" leetcode--code-end))))
+
 (defun leetcode--referer (value)
   "It will return an alist as the HTTP Referer Header.
 VALUE should be the referer."
@@ -485,7 +502,11 @@ Such as 'Two Sum' will be converted to 'two-sum'. 'Pow(x, n)' will be 'powx-n'"
 
 (defun leetcode--code-buffer-data ()
   "Get code buffer content, that is, the `current-buffer'."
-  (leetcode--buffer-content (current-buffer)))
+  (let ((code (leetcode--buffer-content (current-buffer)))
+        (pattern (concat leetcode--code-start "\\([\0-\377]*?\\)" leetcode--code-end)))
+    (if (string-match pattern code)
+        (match-string 1 code)
+      code)))
 
 (defun leetcode--get-slug-title (code-buf)
   "Get slug title before try or submit with CODE-BUF.
@@ -889,11 +910,12 @@ row."
       (goto-char url-http-end-of-headers)
       (let-alist (json-read)
         (let ((qid .data.activeDailyCodingChallengeQuestion.question.qid))
-          (leetcode-show-problem (string-to-number qid)))))))
+          (leetcode-show-problem qid))))))
 
 (aio-defun leetcode-try ()
   "Asynchronously test the code using customized testcase."
   (interactive)
+  (leetcode-restore-layout)
   (aio-await (leetcode--ensure-login t))
   (let* ((title-slug (leetcode--get-slug-title (current-buffer)))
          (problem (leetcode--get-problem title-slug))
@@ -904,9 +926,10 @@ row."
 (aio-defun leetcode-submit ()
   "Asynchronously submit the code and show result."
   (interactive)
+  (leetcode-restore-layout)
   (aio-await (leetcode--ensure-login t))
   (let* ((code-buf (current-buffer))
-         (code (leetcode--buffer-content code-buf))
+         (code (leetcode--code-buffer-data))
          (slug-title (leetcode--get-slug-title code-buf))
          (problem (leetcode--get-problem slug-title))
          (problem-id (leetcode-problem-id problem))
@@ -994,6 +1017,10 @@ alist specified in `display-buffer-alist'."
       (goto-char (point-max))
       (cond
        ((eq .status_code 10)
+        (if (equal .code_answer .expected_code_answer)
+            (insert (leetcode--add-font-lock "PASS: " 'leetcode-accepted-face))
+          (insert (leetcode--add-font-lock "FAIL: " 'leetcode-error-face)))
+        (insert "\n\n")
         ;; Code Answer
         (insert "Code Answer:\n")
         (dotimes (i (length .code_answer))
@@ -1058,9 +1085,12 @@ STATUS_CODE has following possible value:
           (insert (format "Stdout: \n%s\n" .std_output))))
        ((eq .status_code 14)
         (insert (format "Status: %s" (leetcode--add-font-lock .status_msg 'leetcode-error-face)))
-        (insert "\n"))
+        (insert (format "\n\n%s / %s testcases passed\n" .total_correct .total_testcases))
+        (insert (format "Last Test Case: %s\n" .last_testcase)))
        ((eq .status_code 15)
         (insert (format "Status: %s" (leetcode--add-font-lock .status_msg 'leetcode-error-face)))
+        (insert (format "\n\n%s / %s testcases passed\n" .total_correct .total_testcases))
+        (insert (format "Last Test Case: %s\n" .last_testcase))
         (insert "\n\n")
         (insert (format .full_runtime_error)))
        ((eq .status_code 20)
@@ -1313,7 +1343,9 @@ major mode by `leetcode-prefer-language'and `auto-mode-alist'."
                                       (equal (leetcode-snippet-lang-slug s) leetcode--lang))
                                     snippets))
                  (template-code (leetcode-snippet-code snippet)))
+            (leetcode--insert-code-start-marker)
             (insert template-code)
+            (leetcode--insert-code-end-marker)
             (leetcode--replace-in-buffer "" "")))
         (funcall (assoc-default suffix auto-mode-alist #'string-match-p))
         (leetcode-solution-mode t))
@@ -1336,7 +1368,7 @@ major mode by `leetcode-prefer-language'and `auto-mode-alist'."
   "This command should be run in LeetCode code buffer.
 It will restore the layout based on current buffer's name."
   (interactive)
-  (let* ((slug-title (file-name-sans-extension (buffer-name)))
+  (let* ((slug-title (leetcode--get-slug-title (current-buffer)))
          (problem (leetcode--get-problem slug-title))
          (problem-id (leetcode-problem-id problem))
          (desc-buf (get-buffer (leetcode--detail-buffer-name problem-id)))
@@ -1345,6 +1377,9 @@ It will restore the layout based on current buffer's name."
     (leetcode--solving-window-layout)
     (unless desc-buf
       (aio-await (leetcode-show-problem problem-id)))
+    (with-current-buffer result-buf
+      (erase-buffer)
+      (insert "Waiting for result..."))
     (display-buffer desc-buf
                     '((display-buffer-reuse-window
                        leetcode--display-detail)