judge: support multi answers (#401, issue #397)

packages/hydrojudge/package.json

@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.22.5",
+    "version": "2.22.6",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",

packages/hydrojudge/src/judge/objective.ts

@@ -38,8 +38,9 @@ export async function judge({
             time: 0,
             memory: 0,
         };
-        if (typeof ansInfo[0] === 'string') {
+        if (typeof answers[key] === 'string') {
-            if (ansInfo[0]?.trim() === (answers[key] as any)?.trim()) {
+            const stdAns = typeof ansInfo[0] === 'string' ? [ansInfo[0]] : ansInfo[0];
+            if (stdAns.some((ans) => ans.trim() === (answers[key] as any)?.trim())) {
                 totalScore += score;
                 totalStatus = Math.max(totalStatus, STATUS.STATUS_ACCEPTED);
                 next({