From a6eee48a1890709ecc6118648e292a2fa003fc4d Mon Sep 17 00:00:00 2001
From: undefined <i@undefined.moe>
Date: Sun, 23 Aug 2026 05:17:11 +0000
Subject: [PATCH] judge: fix #1200

---
 packages/hydrojudge/src/cases.ts | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/packages/hydrojudge/src/cases.ts b/packages/hydrojudge/src/cases.ts
index 773399ec8..35dbb388b 100644
--- a/packages/hydrojudge/src/cases.ts
+++ b/packages/hydrojudge/src/cases.ts
@@ -16,6 +16,7 @@ function isValidConfig(config) {
         throw new FormatError('Too many testcases. Cancelled.');
     }
     if (config.type === 'communication') {
+        config.num_processes ??= 2;
         if (!Number.isInteger(config.num_processes) || config.num_processes <= 0) {
             throw new FormatError('Number of processes must be a positive integer for communication type.');
         }
@@ -23,7 +24,7 @@ function isValidConfig(config) {
             throw new FormatError('Number of processes larger than processLimit');
         }
     }
-    const time = (config.num_processes || 1) * Math.sum(...config.subtasks.flatMap((subtask) => subtask.cases.map((c) => c.time)));
+    const time = config.num_processes * Math.sum(...config.subtasks.flatMap((subtask) => subtask.cases.map((c) => c.time)));
     if (time > (getConfig('total_time_limit') || 60) * 1000) {
         throw new FormatError('Total time limit longer than {0}s. Cancelled.', [+getConfig('total_time_limit') || 60]);
     }
@@ -35,14 +36,16 @@ function isValidConfig(config) {
     if (config.type === 'interactive' && !config.interactor) {
         throw new FormatError('Interactive problems require an interactor.');
     }
-    if (config.multi_pass && (!Number.isInteger(config.multi_pass) || config.multi_pass < 2 || config.multi_pass > 20)) {
-        throw new FormatError('Multi Pass must be between 2 and 20.');
-    }
-    if (config.multi_pass > 1 && !['default', 'interactive'].includes(config.type)) {
-        throw new FormatError('Multi Pass only supported on default and interactive problems.');
-    }
-    if (config.multi_pass > 1 && config.type === 'default' && !['testlib', 'kattis'].includes(config.checker_type)) {
-        throw new FormatError('Multi Pass on default problems requires a testlib or kattis checker.');
+    if (config.multi_pass) {
+        if (!Number.isInteger(config.multi_pass) || config.multi_pass < 2 || config.multi_pass > 20) {
+            throw new FormatError('Multi Pass must be between 2 and 20.');
+        }
+        if (!['default', 'interactive'].includes(config.type)) {
+            throw new FormatError('Multi Pass only supported on default and interactive problems.');
+        }
+        if (config.type === 'default' && !['testlib', 'kattis'].includes(config.checker_type)) {
+            throw new FormatError('Multi Pass on default problems requires a testlib or kattis checker.');
+        }
     }
 }