use pcode if title empty

Crawler.php

@@ -85,6 +85,12 @@ private function _extractCodeForces($pcode, $url)
         $this->currentProblemCcode = $pcode;
         $this->imageIndex = 1;
 
+        $this->pro["input"] = null;
+        $this->pro["output"] = null;
+        $this->pro["note"] = null;
+        $this->pro["sample"] = null;
+        $this->pro["description"] = null;
+
         $response = $this->getCodeForcesResponse($url);
         $contentType = $response->headers['content-type'];
         $content = $response->body;
@@ -287,6 +293,9 @@ public function crawl($con, $cached, $incremental, $range)
 
             $this->pro['origin'] = "https://codeforces.com/contest/{$problem['contestId']}/problem/{$problem['index']}";
             $this->pro['title'] = str_replace('"', "'", $problem['name']);
+            if(blank($this->pro['title'])) {
+                $this->pro['title'] = $pcode;
+            }
             $this->pro['solved_count'] = $problemset['result']['problemStatistics'][$index]['solvedCount'];
             $this->pro['pcode'] = $pcode;
             $this->pro['index_id'] = $problem['index'];

babel.json

@@ -6,7 +6,7 @@
     "description": "Codeforces & Gym interface for NOJ",
     "license": "MIT",
     "repository": "https://github.com/NJUPTAAA/NOJ_Extension_Codeforces",
-    "version": "0.4.2",
+    "version": "0.4.3",
     "website": "https://codeforces.com/",
     "custom": {
         "css": "resources/custom.css"