fix a stupid bug

hydro/model/problem.ts

@@ -49,7 +49,7 @@ export async function get(
     uid: number = null,
 ): Promise<Pdoc> {
     if (typeof pid !== 'number') {
-        if (!Number.isSafeInteger(parseInt(pid, 10))) pid = parseInt(pid, 10);
+        if (Number.isSafeInteger(parseInt(pid, 10))) pid = parseInt(pid, 10);
     }
     const pdoc = Number.isInteger(pid)
         ? await document.get(domainId, document.TYPE_PROBLEM, pid)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "hydrooj",
-  "version": "2.11.7",
+  "version": "2.11.8",
   "main": "dist/loader.js",
   "bin": "bin/hydrooj.js",
   "repository": "https://github.com/hydro-dev/Hydro.git",